Class represent classes and
+ * interfaces in a running Java application. An enum is a kind of
+ * class and an annotation is a kind of interface. Every array also
+ * belongs to a class that is reflected as a Class object
+ * that is shared by all arrays with the same element type and number
+ * of dimensions. The primitive Java types (boolean,
+ * byte, char, short,
+ * int, long, float, and
+ * double), and the keyword void are also
+ * represented as Class objects.
+ *
+ * Class has no public constructor. Instead Class
+ * objects are constructed automatically by the Java Virtual Machine as classes
+ * are loaded and by calls to the defineClass method in the class
+ * loader.
+ *
+ *
The following example uses a Class object to print the
+ * class name of an object:
+ *
+ *
+ * void printClassName(Object obj) {
+ * System.out.println("The class of " + obj +
+ * " is " + obj.getClass().getName());
+ * }
+ * It is also possible to get the Class object for a named
+ * type (or for void) using a class literal
+ * (JLS Section 15.8.2).
+ * For example:
+ *
+ *
+ * System.out.println("The name of class Foo is: "+Foo.class.getName());
+ * getName. If this Class object represents a
+ * primitive type, this method returns the name of the primitive type. If
+ * this Class object represents void this method returns
+ * "void".
+ *
+ * @return a string representation of this class object.
+ */
+ public String toString() {
+ return (isInterface() ? "interface " : (isPrimitive() ? "" : "class "))
+ + getName();
+ }
+
+
+ /**
+ * Returns the Class object associated with the class or
+ * interface with the given string name. Invoking this method is
+ * equivalent to:
+ *
+ * + * + * where+ * Class.forName(className, true, currentLoader) + *
currentLoader denotes the defining class loader of
+ * the current class.
+ *
+ * For example, the following code fragment returns the
+ * runtime Class descriptor for the class named
+ * java.lang.Thread:
+ *
+ *
+ * Class t = Class.forName("java.lang.Thread")
+ *
+ * A call to forName("X") causes the class named
+ * X to be initialized.
+ *
+ * @param className the fully qualified name of the desired class.
+ * @return the Class object for the class with the
+ * specified name.
+ * @exception LinkageError if the linkage fails
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails
+ * @exception ClassNotFoundException if the class cannot be located
+ */
+ public static Class forName(String className)
+ throws ClassNotFoundException {
+ return forName0(className, true, ClassLoader.getCallerClassLoader());
+ }
+
+
+ /**
+ * Returns the Class object associated with the class or
+ * interface with the given string name, using the given class loader.
+ * Given the fully qualified name for a class or interface (in the same
+ * format returned by getName) this method attempts to
+ * locate, load, and link the class or interface. The specified class
+ * loader is used to load the class or interface. If the parameter
+ * loader is null, the class is loaded through the bootstrap
+ * class loader. The class is initialized only if the
+ * initialize parameter is true and if it has
+ * not been initialized earlier.
+ *
+ *
If name denotes a primitive type or void, an attempt
+ * will be made to locate a user-defined class in the unnamed package whose
+ * name is name. Therefore, this method cannot be used to
+ * obtain any of the Class objects representing primitive
+ * types or void.
+ *
+ *
If name denotes an array class, the component type of
+ * the array class is loaded but not initialized.
+ *
+ *
For example, in an instance method the expression: + * + *
+ * Class.forName("Foo")
+ *
+ * Class.forName("Foo", true, this.getClass().getClassLoader())
+ * If the loader is null, and a security
+ * manager is present, and the caller's class loader is not null, then this
+ * method calls the security manager's checkPermission method
+ * with a RuntimePermission("getClassLoader") permission to
+ * ensure it's ok to access the bootstrap class loader.
+ *
+ * @param name fully qualified name of the desired class
+ * @param initialize whether the class must be initialized
+ * @param loader class loader from which the class must be loaded
+ * @return class object representing the desired class
+ *
+ * @exception LinkageError if the linkage fails
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails
+ * @exception ClassNotFoundException if the class cannot be located by
+ * the specified class loader
+ *
+ * @see java.lang.Class#forName(String)
+ * @see java.lang.ClassLoader
+ * @since 1.2
+ */
+ public static Class forName(String name, boolean initialize,
+ ClassLoader loader)
+ throws ClassNotFoundException
+ {
+ if (loader == null) {
+ SecurityManager sm = System.getSecurityManager();
+ if (sm != null) {
+ ClassLoader ccl = ClassLoader.getCallerClassLoader();
+ if (ccl != null) {
+ sm.checkPermission(
+ SecurityConstants.GET_CLASSLOADER_PERMISSION);
+ }
+ }
+ }
+ return forName0(name, initialize, loader);
+ }
+
+ /** Called after security checks have been made. */
+ private static native Class forName0(String name, boolean initialize,
+ ClassLoader loader)
+ throws ClassNotFoundException;
+
+ /**
+ * Creates a new instance of the class represented by this Class
+ * object. The class is instantiated as if by a new
+ * expression with an empty argument list. The class is initialized if it
+ * has not already been initialized.
+ *
+ *
Note that this method propagates any exception thrown by the
+ * nullary constructor, including a checked exception. Use of
+ * this method effectively bypasses the compile-time exception
+ * checking that would otherwise be performed by the compiler.
+ * The {@link
+ * java.lang.reflect.Constructor#newInstance(java.lang.Object...)
+ * Constructor.newInstance} method avoids this problem by wrapping
+ * any exception thrown by the constructor in a (checked) {@link
+ * java.lang.reflect.InvocationTargetException}.
+ *
+ * @return a newly allocated instance of the class represented by this
+ * object.
+ * @exception IllegalAccessException if the class or its nullary
+ * constructor is not accessible.
+ * @exception InstantiationException
+ * if this Class represents an abstract class,
+ * an interface, an array class, a primitive type, or void;
+ * or if the class has no nullary constructor;
+ * or if the instantiation fails for some other reason.
+ * @exception ExceptionInInitializerError if the initialization
+ * provoked by this method fails.
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
Object is assignment-compatible
+ * with the object represented by this Class. This method is
+ * the dynamic equivalent of the Java language instanceof
+ * operator. The method returns true if the specified
+ * Object argument is non-null and can be cast to the
+ * reference type represented by this Class object without
+ * raising a ClassCastException. It returns false
+ * otherwise.
+ *
+ * Specifically, if this Class object represents a
+ * declared class, this method returns true if the specified
+ * Object argument is an instance of the represented class (or
+ * of any of its subclasses); it returns false otherwise. If
+ * this Class object represents an array class, this method
+ * returns true if the specified Object argument
+ * can be converted to an object of the array class by an identity
+ * conversion or by a widening reference conversion; it returns
+ * false otherwise. If this Class object
+ * represents an interface, this method returns true if the
+ * class or any superclass of the specified Object argument
+ * implements this interface; it returns false otherwise. If
+ * this Class object represents a primitive type, this method
+ * returns false.
+ *
+ * @param obj the object to check
+ * @return true if obj is an instance of this class
+ *
+ * @since JDK1.1
+ */
+ public native boolean isInstance(Object obj);
+
+
+ /**
+ * Determines if the class or interface represented by this
+ * Class object is either the same as, or is a superclass or
+ * superinterface of, the class or interface represented by the specified
+ * Class parameter. It returns true if so;
+ * otherwise it returns false. If this Class
+ * object represents a primitive type, this method returns
+ * true if the specified Class parameter is
+ * exactly this Class object; otherwise it returns
+ * false.
+ *
+ *
Specifically, this method tests whether the type represented by the
+ * specified Class parameter can be converted to the type
+ * represented by this Class object via an identity conversion
+ * or via a widening reference conversion. See The Java Language
+ * Specification, sections 5.1.1 and 5.1.4 , for details.
+ *
+ * @param cls the Class object to be checked
+ * @return the boolean value indicating whether objects of the
+ * type cls can be assigned to objects of this class
+ * @exception NullPointerException if the specified Class parameter is
+ * null.
+ * @since JDK1.1
+ */
+ public native boolean isAssignableFrom(Class cls);
+
+
+ /**
+ * Determines if the specified Class object represents an
+ * interface type.
+ *
+ * @return true if this object represents an interface;
+ * false otherwise.
+ */
+ public native boolean isInterface();
+
+
+ /**
+ * Determines if this Class object represents an array class.
+ *
+ * @return true if this object represents an array class;
+ * false otherwise.
+ * @since JDK1.1
+ */
+ public native boolean isArray();
+
+
+ /**
+ * Determines if the specified Class object represents a
+ * primitive type.
+ *
+ *
There are nine predefined Class objects to represent
+ * the eight primitive types and void. These are created by the Java
+ * Virtual Machine, and have the same names as the primitive types that
+ * they represent, namely boolean, byte,
+ * char, short, int,
+ * long, float, and double.
+ *
+ *
These objects may only be accessed via the following public static
+ * final variables, and are the only Class objects for which
+ * this method returns true.
+ *
+ * @return true if and only if this class represents a primitive type
+ *
+ * @see java.lang.Boolean#TYPE
+ * @see java.lang.Character#TYPE
+ * @see java.lang.Byte#TYPE
+ * @see java.lang.Short#TYPE
+ * @see java.lang.Integer#TYPE
+ * @see java.lang.Long#TYPE
+ * @see java.lang.Float#TYPE
+ * @see java.lang.Double#TYPE
+ * @see java.lang.Void#TYPE
+ * @since JDK1.1
+ */
+ public native boolean isPrimitive();
+
+ /**
+ * Returns true if this Class object represents an annotation
+ * type. Note that if this method returns true, {@link #isInterface()}
+ * would also return true, as all annotation types are also interfaces.
+ *
+ * @return true if this class object represents an annotation
+ * type; false otherwise
+ * @since 1.5
+ */
+ public boolean isAnnotation() {
+ return (getModifiers() & ANNOTATION) != 0;
+ }
+
+ /**
+ * Returns true if this class is a synthetic class;
+ * returns false otherwise.
+ * @return true if and only if this class is a synthetic class as
+ * defined by the Java Language Specification.
+ * @since 1.5
+ */
+ public boolean isSynthetic() {
+ return (getModifiers() & SYNTHETIC) != 0;
+ }
+
+ /**
+ * Returns the name of the entity (class, interface, array class,
+ * primitive type, or void) represented by this Class object,
+ * as a String.
+ *
+ *
If this class object represents a reference type that is not an + * array type then the binary name of the class is returned, as specified + * by the Java Language Specification, Second Edition. + * + *
If this class object represents a primitive type or void, then the + * name returned is a String equal to the Java language + * keyword corresponding to the primitive type or void. + * + *
If this class object represents a class of arrays, then the internal + * form of the name consists of the name of the element type preceded by + * one or more '[' characters representing the depth of the array + * nesting. The encoding of element type names is as follows: + * + *
+ * + *+ *
Element Type Encoding + * boolean Z + * byte B + * char C + * class or interface + * Lclassname; + * double D + * float F + * int I + * long J + * short S + *
The class or interface name classname is the binary name of + * the class specified above. + * + *
Examples: + *
+ * + * @return the name of the class or interface + * represented by this object. + */ + public String getName() { + if (name == null) + name = getName0(); + return name; + } + + // cache the name to reduce the number of calls into the VM + private transient String name; + private native String getName0(); + + /** + * Returns the class loader for the class. Some implementations may use + * null to represent the bootstrap class loader. This method will return + * null in such implementations if this class was loaded by the bootstrap + * class loader. + * + *+ * String.class.getName() + * returns "java.lang.String" + * byte.class.getName() + * returns "byte" + * (new Object[3]).getClass().getName() + * returns "[Ljava.lang.Object;" + * (new int[3][4][5][6][7][8][9]).getClass().getName() + * returns "[[[[[[[I" + *
If a security manager is present, and the caller's class loader is
+ * not null and the caller's class loader is not the same as or an ancestor of
+ * the class loader for the class whose class loader is requested, then
+ * this method calls the security manager's checkPermission
+ * method with a RuntimePermission("getClassLoader")
+ * permission to ensure it's ok to access the class loader for the class.
+ *
+ *
If this object
+ * represents a primitive type or void, null is returned.
+ *
+ * @return the class loader that loaded the class or interface
+ * represented by this object.
+ * @throws SecurityException
+ * if a security manager exists and its
+ * If the superclass is a parameterized type, the Type
+ * object returned must accurately reflect the actual type
+ * parameters used in the source code. The parameterized type
+ * representing the superclass is created if it had not been
+ * created before. See the declaration of {@link
+ * java.lang.reflect.ParameterizedType ParameterizedType} for the
+ * semantics of the creation process for parameterized types. If
+ * this Class represents either the Object
+ * class, an interface, a primitive type, or void, then null is
+ * returned. If this object represents an array class then the
+ * Class object representing the Object class is
+ * returned.
+ *
+ * @throws GenericSignatureFormatError if the generic
+ * class signature does not conform to the format specified in the
+ * Java Virtual Machine Specification, 3rd edition
+ * @throws TypeNotPresentException if the generic superclass
+ * refers to a non-existent type declaration
+ * @throws MalformedParameterizedTypeException if the
+ * generic superclass refers to a parameterized type that cannot be
+ * instantiated for any reason
+ * @return the superclass of the class represented by this object
+ * @since 1.5
+ */
+ public Type getGenericSuperclass() {
+ if (getGenericSignature() != null) {
+ // Historical irregularity:
+ // Generic signature marks interfaces with superclass = Object
+ // but this API returns null for interfaces
+ if (isInterface())
+ return null;
+ return getGenericInfo().getSuperclass();
+ } else
+ return getSuperclass();
+ }
+
+ /**
+ * Gets the package for this class. The class loader of this class is used
+ * to find the package. If the class was loaded by the bootstrap class
+ * loader the set of packages loaded from CLASSPATH is searched to find the
+ * package of the class. Null is returned if no package object was created
+ * by the class loader of this class.
+ *
+ * Packages have attributes for versions and specifications only if the
+ * information was defined in the manifests that accompany the classes, and
+ * if the class loader created the package instance with the attributes
+ * from the manifest.
+ *
+ * @return the package of the class, or null if no package
+ * information is available from the archive or codebase.
+ */
+ public Package getPackage() {
+ return Package.getPackage(this);
+ }
+
+
+ /**
+ * Determines the interfaces implemented by the class or interface
+ * represented by this object.
+ *
+ * If this object represents a class, the return value is an array
+ * containing objects representing all interfaces implemented by the
+ * class. The order of the interface objects in the array corresponds to
+ * the order of the interface names in the If this object represents an interface, the array contains objects
+ * representing all interfaces extended by the interface. The order of the
+ * interface objects in the array corresponds to the order of the interface
+ * names in the If this object represents a class or interface that implements no
+ * interfaces, the method returns an array of length 0.
+ *
+ * If this object represents a primitive type or void, the method
+ * returns an array of length 0.
+ *
+ * @return an array of interfaces implemented by this class.
+ */
+ public native Class[] getInterfaces();
+
+ /**
+ * Returns the Types representing the interfaces
+ * directly implemented by the class or interface represented by
+ * this object.
+ *
+ * If a superinterface is a parameterized type, the
+ * Type object returned for it must accurately reflect
+ * the actual type parameters used in the source code. The
+ * parameterized type representing each superinterface is created
+ * if it had not been created before. See the declaration of
+ * {@link java.lang.reflect.ParameterizedType ParameterizedType}
+ * for the semantics of the creation process for parameterized
+ * types.
+ *
+ * If this object represents a class, the return value is an
+ * array containing objects representing all interfaces
+ * implemented by the class. The order of the interface objects in
+ * the array corresponds to the order of the interface names in
+ * the implements clause of the declaration of the class
+ * represented by this object. In the case of an array class, the
+ * interfaces Cloneable and Serializable are
+ * returned in that order.
+ *
+ * If this object represents an interface, the array contains
+ * objects representing all interfaces directly extended by the
+ * interface. The order of the interface objects in the array
+ * corresponds to the order of the interface names in the
+ * extends clause of the declaration of the interface
+ * represented by this object.
+ *
+ * If this object represents a class or interface that
+ * implements no interfaces, the method returns an array of length
+ * 0.
+ *
+ * If this object represents a primitive type or void, the
+ * method returns an array of length 0.
+ *
+ * @throws GenericSignatureFormatError
+ * if the generic class signature does not conform to the format
+ * specified in the Java Virtual Machine Specification, 3rd edition
+ * @throws TypeNotPresentException if any of the generic
+ * superinterfaces refers to a non-existent type declaration
+ * @throws MalformedParameterizedTypeException if any of the
+ * generic superinterfaces refer to a parameterized type that cannot
+ * be instantiated for any reason
+ * @return an array of interfaces implemented by this class
+ * @since 1.5
+ */
+ public Type[] getGenericInterfaces() {
+ if (getGenericSignature() != null)
+ return getGenericInfo().getSuperInterfaces();
+ else
+ return getInterfaces();
+ }
+
+
+ /**
+ * Returns the If the underlying class is an array class, then its
+ * The modifier encodings are defined in The Java Virtual Machine
+ * Specification, table 4.1.
+ *
+ * @return the The simple name of an array is the simple name of the
+ * component type with "[]" appended. In particular the simple
+ * name of an array whose component type is anonymous is "[]".
+ *
+ * @return the simple name of the underlying class
+ * @since 1.5
+ */
+ public String getSimpleName() {
+ if (isArray())
+ return getComponentType().getSimpleName()+"[]";
+
+ String simpleName = getSimpleBinaryName();
+ if (simpleName == null) { // top level class
+ simpleName = getName();
+ return simpleName.substring(simpleName.lastIndexOf(".")+1); // strip the package name
+ }
+ // According to JLS3 "Binary Compatibility" (13.1) the binary
+ // name of non-package classes (not top level) is the binary
+ // name of the immediately enclosing class followed by a '$' followed by:
+ // (for nested and inner classes): the simple name.
+ // (for local classes): 1 or more digits followed by the simple name.
+ // (for anonymous classes): 1 or more digits.
+
+ // Since getSimpleBinaryName() will strip the binary name of
+ // the immediatly enclosing class, we are now looking at a
+ // string that matches the regular expression "\$[0-9]*"
+ // followed by a simple name (considering the simple of an
+ // anonymous class to be the empty string).
+
+ // Remove leading "\$[0-9]*" from the name
+ int length = simpleName.length();
+ if (length < 1 || simpleName.charAt(0) != '$')
+ throw new InternalError("Malformed class name");
+ int index = 1;
+ while (index < length && isAsciiDigit(simpleName.charAt(index)))
+ index++;
+ // Eventually, this is the empty string iff this is an anonymous class
+ return simpleName.substring(index);
+ }
+
+ /**
+ * Character.isDigit answers true to some non-ascii
+ * digits. This one does not.
+ */
+ private static boolean isAsciiDigit(char c) {
+ return '0' <= c && c <= '9';
+ }
+
+ /**
+ * Returns the canonical name of the underlying class as
+ * defined by the Java Language Specification. Returns null if
+ * the underlying class does not have a canonical name (i.e., if
+ * it is a local or anonymous class or an array whose component
+ * type does not have a canonical name).
+ * @return the canonical name of the underlying class if it exists, and
+ * null otherwise.
+ * @since 1.5
+ */
+ public String getCanonicalName() {
+ if (isArray()) {
+ String canonicalName = getComponentType().getCanonicalName();
+ if (canonicalName != null)
+ return canonicalName + "[]";
+ else
+ return null;
+ }
+ if (isLocalOrAnonymousClass())
+ return null;
+ Class enclosingClass = getEnclosingClass();
+ if (enclosingClass == null) { // top level class
+ return getName();
+ } else {
+ String enclosingName = enclosingClass.getCanonicalName();
+ if (enclosingName == null)
+ return null;
+ return enclosingName + "." + getSimpleName();
+ }
+ }
+
+ /**
+ * Returns true if and only if the underlying class
+ * is an anonymous class.
+ *
+ * @return true if and only if this class is an anonymous class.
+ * @since 1.5
+ */
+ public boolean isAnonymousClass() {
+ return "".equals(getSimpleName());
+ }
+
+ /**
+ * Returns true if and only if the underlying class
+ * is a local class.
+ *
+ * @return true if and only if this class is a local class.
+ * @since 1.5
+ */
+ public boolean isLocalClass() {
+ return isLocalOrAnonymousClass() && !isAnonymousClass();
+ }
+
+ /**
+ * Returns true if and only if the underlying class
+ * is a member class.
+ *
+ * @return true if and only if this class is a member class.
+ * @since 1.5
+ */
+ public boolean isMemberClass() {
+ return getSimpleBinaryName() != null && !isLocalOrAnonymousClass();
+ }
+
+ /**
+ * Returns the "simple binary name" of the underlying class, i.e.,
+ * the binary name without the leading enclosing class name.
+ * Returns null if the underlying class is a top level
+ * class.
+ */
+ private String getSimpleBinaryName() {
+ Class enclosingClass = getEnclosingClass();
+ if (enclosingClass == null) // top level class
+ return null;
+ // Otherwise, strip the enclosing class' name
+ try {
+ return getName().substring(enclosingClass.getName().length());
+ } catch (IndexOutOfBoundsException ex) {
+ throw new InternalError("Malformed class name");
+ }
+ }
+
+ /**
+ * Returns true if this is a local class or an anonymous
+ * class. Returns false otherwise.
+ */
+ private boolean isLocalOrAnonymousClass() {
+ // JVM Spec 4.8.6: A class must have an EnclosingMethod
+ // attribute if and only if it is a local class or an
+ // anonymous class.
+ return getEnclosingMethodInfo() != null;
+ }
+
+ /**
+ * Returns an array containing Specifically, if this The implicit length field for array class is not reflected by this
+ * method. User code should use the methods of class See The Java Language Specification, sections 8.2 and 8.3.
+ *
+ * @return the array of The class initialization method See The Java Language Specification, sections 8.2 and 8.4.
+ *
+ * @return the array of The field to be reflected is determined by the algorithm that
+ * follows. Let C be the class represented by this object:
+ * See The Java Language Specification, sections 8.2 and 8.3.
+ *
+ * @param name the field name
+ * @return the If the Note that there may be more than one matching method in a
+ * class because while the Java language forbids a class to
+ * declare multiple methods with the same signature but different
+ * return types, the Java virtual machine does not. This
+ * increased flexibility in the virtual machine can be used to
+ * implement various language features. For example, covariant
+ * returns can be implemented with {@linkplain
+ * java.lang.reflect.Method#isBridge bridge methods}; the bridge
+ * method and the method being overridden would have the same
+ * signature but different return types.
+ *
+ * See The Java Language Specification, sections 8.2 and 8.4.
+ *
+ * @param name the name of the method
+ * @param parameterTypes the list of parameters
+ * @return the The constructor to reflect is the public constructor of the class
+ * represented by this See The Java Language Specification, sections 8.2 and 8.3.
+ *
+ * @return the array of See The Java Language Specification, section 8.2.
+ *
+ * @return the array of See The Java Language Specification, section 8.2.
+ *
+ * @return the array of Before delegation, an absolute resource name is constructed from the
+ * given resource name using this algorithm:
+ *
+ * Where the modified_package_name is the package name of this
+ * object with '/' substituted for '.'
+ * ('\u002e').
+ *
+ * Before delegation, an absolute resource name is constructed from the
+ * given resource name using this algorithm:
+ *
+ * Where the modified_package_name is the package name of this
+ * object with '/' substituted for '.'
+ * ('\u002e').
+ *
+ * Default policy: allow all clients access with normal Java access
+ * control.
+ */
+ private void checkMemberAccess(int which, ClassLoader ccl) {
+ SecurityManager s = System.getSecurityManager();
+ if (s != null) {
+ s.checkMemberAccess(this, which);
+ ClassLoader cl = getClassLoader0();
+ if ((ccl != null) && (ccl != cl) &&
+ ((cl == null) || !cl.isAncestor(ccl))) {
+ String name = this.getName();
+ int i = name.lastIndexOf('.');
+ if (i != -1) {
+ s.checkPackageAccess(name.substring(0, i));
+ }
+ }
+ }
+ }
+
+ /**
+ * Add a package name prefix if the name is not absolute Remove leading "/"
+ * if name is absolute
+ */
+ private String resolveName(String name) {
+ if (name == null) {
+ return name;
+ }
+ if (!name.startsWith("/")) {
+ Class c = this;
+ while (c.isArray()) {
+ c = c.getComponentType();
+ }
+ String baseName = c.getName();
+ int index = baseName.lastIndexOf('.');
+ if (index != -1) {
+ name = baseName.substring(0, index).replace('.', '/')
+ +"/"+name;
+ }
+ } else {
+ name = name.substring(1);
+ }
+ return name;
+ }
+
+ /**
+ * Reflection support.
+ */
+
+ // Caches for certain reflective results
+ private static boolean useCaches = true;
+ private volatile transient SoftReference declaredFields;
+ private volatile transient SoftReference publicFields;
+ private volatile transient SoftReference declaredMethods;
+ private volatile transient SoftReference publicMethods;
+ private volatile transient SoftReference declaredConstructors;
+ private volatile transient SoftReference publicConstructors;
+ // Intermediate results for getFields and getMethods
+ private volatile transient SoftReference declaredPublicFields;
+ private volatile transient SoftReference declaredPublicMethods;
+
+ // Incremented by the VM on each call to JVM TI RedefineClasses()
+ // that redefines this class or a superclass.
+ private volatile transient int classRedefinedCount = 0;
+
+ // Value of classRedefinedCount when we last cleared the cached values
+ // that are sensitive to class redefinition.
+ private volatile transient int lastRedefinedCount = 0;
+
+ // Clears cached values that might possibly have been obsoleted by
+ // a class redefinition.
+ private void clearCachesOnClassRedefinition() {
+ if (lastRedefinedCount != classRedefinedCount) {
+ declaredFields = publicFields = declaredPublicFields = null;
+ declaredMethods = publicMethods = declaredPublicMethods = null;
+ declaredConstructors = publicConstructors = null;
+ annotations = declaredAnnotations = null;
+
+ // Use of "volatile" (and synchronization by caller in the case
+ // of annotations) ensures that no thread sees the update to
+ // lastRedefinedCount before seeing the caches cleared.
+ // We do not guard against brief windows during which multiple
+ // threads might redundantly work to fill an empty cache.
+ lastRedefinedCount = classRedefinedCount;
+ }
+ }
+
+ // Generic signature handling
+ private native String getGenericSignature();
+
+ // Generic info repository; lazily initialized
+ private transient ClassRepository genericInfo;
+
+ // accessor for factory
+ private GenericsFactory getFactory() {
+ // create scope and factory
+ return CoreReflectionFactory.make(this, ClassScope.make(this));
+ }
+
+ // accessor for generic info repository
+ private ClassRepository getGenericInfo() {
+ // lazily initialize repository if necessary
+ if (genericInfo == null) {
+ // create and cache generic info repository
+ genericInfo = ClassRepository.make(getGenericSignature(),
+ getFactory());
+ }
+ return genericInfo; //return cached repository
+ }
+
+ // Annotations handling
+ private native Map
+ * Few programmers will have any need for this method; it is provided
+ * for the benefit of the JRE itself. (It allows a class to determine at
+ * the time that it is initialized whether assertions should be enabled.)
+ * Note that this method is not guaranteed to return the actual
+ * assertion status that was (or will be) associated with the specified
+ * class when it was (or will be) initialized.
+ *
+ * @return the desired assertion status of the specified class.
+ * @see java.lang.ClassLoader#setClassAssertionStatus
+ * @see java.lang.ClassLoader#setPackageAssertionStatus
+ * @see java.lang.ClassLoader#setDefaultAssertionStatus
+ * @since 1.4
+ */
+ public boolean desiredAssertionStatus() {
+ ClassLoader loader = getClassLoader();
+ // If the loader is null this is a system class, so ask the VM
+ if (loader == null)
+ return desiredAssertionStatus0(this);
+
+ synchronized(loader) {
+ // If the classloader has been initialized with
+ // the assertion directives, ask it. Otherwise,
+ // ask the VM.
+ return (loader.classAssertionStatus == null ?
+ desiredAssertionStatus0(this) :
+ loader.desiredAssertionStatus(getName()));
+ }
+ }
+
+ // Retrieves the desired assertion status of this class from the VM
+ private static native boolean desiredAssertionStatus0(Class clazz);
+
+ /**
+ * Returns true if and only if this class was declared as an enum in the
+ * source code.
+ *
+ * @return true if and only if this class was declared as an enum in the
+ * source code
+ * @since 1.5
+ */
+ public boolean isEnum() {
+ // An enum must both directly extend java.lang.Enum and have
+ // the ENUM bit set; classes for specialized enum constants
+ // don't do the former.
+ return (this.getModifiers() & ENUM) != 0 &&
+ this.getSuperclass() == java.lang.Enum.class;
+ }
+
+ // Fetches the factory for reflective objects
+ private static ReflectionFactory getReflectionFactory() {
+ if (reflectionFactory == null) {
+ reflectionFactory = (ReflectionFactory)
+ java.security.AccessController.doPrivileged
+ (new sun.reflect.ReflectionFactory.GetReflectionFactoryAction());
+ }
+ return reflectionFactory;
+ }
+ private static ReflectionFactory reflectionFactory;
+
+ // To be able to query system properties as soon as they're available
+ private static boolean initted = false;
+ private static void checkInitted() {
+ if (initted) return;
+ AccessController.doPrivileged(new PrivilegedAction() {
+ public Object run() {
+ // Tests to ensure the system properties table is fully
+ // initialized. This is needed because reflection code is
+ // called very early in the initialization process (before
+ // command-line arguments have been parsed and therefore
+ // these user-settable properties installed.) We assume that
+ // if System.out is non-null then the System class has been
+ // fully initialized and that the bulk of the startup code
+ // has been run.
+
+ if (System.out == null) {
+ // java.lang.System not yet fully initialized
+ return null;
+ }
+
+ String val =
+ System.getProperty("sun.reflect.noCaches");
+ if (val != null && val.equals("true")) {
+ useCaches = false;
+ }
+
+ initted = true;
+ return null;
+ }
+ });
+ }
+
+ /**
+ * Returns the elements of this enum class or null if this
+ * Class object does not represent an enum type.
+ *
+ * @return an array containing the values comprising the enum class
+ * represented by this Class object in the order they're
+ * declared, or null if this Class object does not
+ * represent an enum type
+ * @since 1.5
+ */
+ public T[] getEnumConstants() {
+ T[] values = getEnumConstantsShared();
+ return (values != null) ? values.clone() : null;
+ }
+
+ /**
+ * Returns the elements of this enum class or null if this
+ * Class object does not represent an enum type;
+ * identical to getEnumConstantsShared except that
+ * the result is uncloned, cached, and shared by all callers.
+ */
+ T[] getEnumConstantsShared() {
+ if (enumConstants == null) {
+ if (!isEnum()) return null;
+ try {
+ final Method values = getMethod("values");
+ java.security.AccessController.doPrivileged
+ (new java.security.PrivilegedAction() {
+ public Object run() {
+ values.setAccessible(true);
+ return null;
+ }
+ });
+ enumConstants = (T[])values.invoke(null);
+ }
+ // These can happen when users concoct enum-like classes
+ // that don't comply with the enum spec.
+ catch (InvocationTargetException ex) { return null; }
+ catch (NoSuchMethodException ex) { return null; }
+ catch (IllegalAccessException ex) { return null; }
+ }
+ return enumConstants;
+ }
+ private volatile transient T[] enumConstants = null;
+
+ /**
+ * Returns a map from simple name to enum constant. This package-private
+ * method is used internally by Enum to implement
+ * public static This method is useful when a client needs to "narrow" the type of
+ * a Class object to pass it to an API that restricts the
+ * Class objects that it is willing to accept. A cast would
+ * generate a compile-time warning, as the correctness of the cast
+ * could not be checked at runtime (because generic types are implemented
+ * by erasure).
+ *
+ * @return this Class object, cast to represent a subclass of
+ * the specified class object.
+ * @throws ClassCastException if this Class object does not
+ * represent a subclass of the specified class (here "subclass" includes
+ * the class itself).
+ * @since 1.5
+ */
+ public Class asSubclass(Class clazz) {
+ if (clazz.isAssignableFrom(this))
+ return (Class) this;
+ else
+ throw new ClassCastException(this.toString());
+ }
+
+ /**
+ * @throws NullPointerException {@inheritDoc}
+ * @since 1.5
+ */
+ public A getAnnotation(Class annotationClass) {
+ if (annotationClass == null)
+ throw new NullPointerException();
+
+ initAnnotationsIfNecessary();
+ return (A) annotations.get(annotationClass);
+ }
+
+ /**
+ * @throws NullPointerException {@inheritDoc}
+ * @since 1.5
+ */
+ public boolean isAnnotationPresent(
+ Class annotationClass) {
+ if (annotationClass == null)
+ throw new NullPointerException();
+
+ return getAnnotation(annotationClass) != null;
+ }
+
+
+ private static Annotation[] EMPTY_ANNOTATIONS_ARRAY = new Annotation[0];
+
+ /**
+ * @since 1.5
+ */
+ public Annotation[] getAnnotations() {
+ initAnnotationsIfNecessary();
+ return annotations.values().toArray(EMPTY_ANNOTATIONS_ARRAY);
+ }
+
+ /**
+ * @since 1.5
+ */
+ public Annotation[] getDeclaredAnnotations() {
+ initAnnotationsIfNecessary();
+ return declaredAnnotations.values().toArray(EMPTY_ANNOTATIONS_ARRAY);
+ }
+
+ // Annotations cache
+ private transient Map If a formal parameter type is a parameterized type,
+ * the Type object returned for it must accurately reflect
+ * the actual type parameters used in the source code.
+ *
+ * If a formal parameter type is a type variable or a parameterized
+ * type, it is created. Otherwise, it is resolved.
+ *
+ * @return an array of Types that represent the formal
+ * parameter types of the underlying method, in declaration order
+ * @throws GenericSignatureFormatError
+ * if the generic method signature does not conform to the format
+ * specified in the Java Virtual Machine Specification, 3rd edition
+ * @throws TypeNotPresentException if any of the parameter
+ * types of the underlying method refers to a non-existent type
+ * declaration
+ * @throws MalformedParameterizedTypeException if any of
+ * the underlying method's parameter types refer to a parameterized
+ * type that cannot be instantiated for any reason
+ * @since 1.5
+ */
+ public Type[] getGenericParameterTypes() {
+ if (getSignature() != null)
+ return getGenericInfo().getParameterTypes();
+ else
+ return getParameterTypes();
+ }
+
+
+ /**
+ * Returns an array of If an exception type is a parameterized type, the Type
+ * object returned for it must accurately reflect the actual type
+ * parameters used in the source code.
+ *
+ * If an exception type is a type variable or a parameterized
+ * type, it is created. Otherwise, it is resolved.
+ *
+ * @return an array of Types that represent the exception types
+ * thrown by the underlying method
+ * @throws GenericSignatureFormatError
+ * if the generic method signature does not conform to the format
+ * specified in the Java Virtual Machine Specification, 3rd edition
+ * @throws TypeNotPresentException if the underlying method's
+ * throws clause refers to a non-existent type declaration
+ * @throws MalformedParameterizedTypeException if
+ * the underlying method's throws clause refers to a
+ * parameterized type that cannot be instantiated for any reason
+ * @since 1.5
+ */
+ public Type[] getGenericExceptionTypes() {
+ Type[] result;
+ if (getSignature() != null &&
+ ( (result = getGenericInfo().getExceptionTypes()).length > 0 ))
+ return result;
+ else
+ return getExceptionTypes();
+ }
+
+ /**
+ * Compares this The only possible modifiers for constructors are the access
+ * modifiers public, protected or
+ * private. Only one of these may appear, or none if the
+ * constructor has default (package) access.
+ */
+ public String toString() {
+ try {
+ StringBuffer sb = new StringBuffer();
+ int mod = getModifiers() & LANGUAGE_MODIFIERS;
+ if (mod != 0) {
+ sb.append(Modifier.toString(mod) + " ");
+ }
+ sb.append(Field.getTypeName(getDeclaringClass()));
+ sb.append("(");
+ Class[] params = parameterTypes; // avoid clone
+ for (int j = 0; j < params.length; j++) {
+ sb.append(Field.getTypeName(params[j]));
+ if (j < (params.length - 1))
+ sb.append(",");
+ }
+ sb.append(")");
+ Class[] exceptions = exceptionTypes; // avoid clone
+ if (exceptions.length > 0) {
+ sb.append(" throws ");
+ for (int k = 0; k < exceptions.length; k++) {
+ sb.append(exceptions[k].getName());
+ if (k < (exceptions.length - 1))
+ sb.append(",");
+ }
+ }
+ return sb.toString();
+ } catch (Exception e) {
+ return "<" + e + ">";
+ }
+ }
+
+ /**
+ * Returns a string describing this The only possible modifiers for constructors are the access
+ * modifiers public, protected or
+ * private. Only one of these may appear, or none if the
+ * constructor has default (package) access.
+ *
+ * @return a string describing this If the number of formal parameters required by the underlying constructor
+ * is 0, the supplied If the constructor's declaring class is an inner class in a
+ * non-static context, the first argument to the constructor needs
+ * to be the enclosing instance; see The Java Language
+ * Specification, section 15.9.3.
+ *
+ * If the required access and argument checks succeed and the
+ * instantiation will proceed, the constructor's declaring class
+ * is initialized if it has not already been initialized.
+ *
+ * If the constructor completes normally, returns the newly
+ * created and initialized instance.
+ *
+ * @param initargs array of objects to be passed as arguments to
+ * the constructor call; values of primitive types are wrapped in
+ * a wrapper object of the appropriate type (e.g. a float
+ * in a {@link java.lang.Float Float})
+ *
+ * @return a new object created by calling the constructor
+ * this object represents
+ *
+ * @exception IllegalAccessException if this A If the Type is a parameterized type, the
+ * Type object returned must accurately reflect the
+ * actual type parameters used in the source code.
+ *
+ * If the type of the underlying field is a type variable or a
+ * parameterized type, it is created. Otherwise, it is resolved.
+ *
+ * @return a Type object that represents the declared type for
+ * the field represented by this Field object
+ * @throws GenericSignatureFormatError if the generic field
+ * signature does not conform to the format specified in the Java
+ * Virtual Machine Specification, 3rd edition
+ * @throws TypeNotPresentException if the generic type
+ * signature of the underlying field refers to a non-existent
+ * type declaration
+ * @throws MalformedParameterizedTypeException if the generic
+ * signature of the underlying field refers to a parameterized type
+ * that cannot be instantiated for any reason
+ * @since 1.5
+ */
+ public Type getGenericType() {
+ if (getGenericSignature() != null)
+ return getGenericInfo().getGenericType();
+ else
+ return getType();
+ }
+
+
+ /**
+ * Compares this The modifiers are placed in canonical order as specified by
+ * "The Java Language Specification". This is public,
+ * protected or private first, and then other
+ * modifiers in the following order: static, final,
+ * transient, volatile.
+ */
+ public String toString() {
+ int mod = getModifiers();
+ return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
+ + getTypeName(getType()) + " "
+ + getTypeName(getDeclaringClass()) + "."
+ + getName());
+ }
+
+ /**
+ * Returns a string describing this The modifiers are placed in canonical order as specified by
+ * "The Java Language Specification". This is public,
+ * protected or private first, and then other
+ * modifiers in the following order: static, final,
+ * transient, volatile.
+ *
+ * @return a string describing this The underlying field's value is obtained as follows:
+ *
+ * If the underlying field is a static field, the Otherwise, the underlying field is an instance field. If the
+ * specified If this Otherwise, the value is retrieved from the underlying instance
+ * or static field. If the field has a primitive type, the value
+ * is wrapped in an object before being returned, otherwise it is
+ * returned as is.
+ *
+ * If the field is hidden in the type of The operation proceeds as follows:
+ *
+ * If the underlying field is static, the Otherwise the underlying field is an instance field. If the
+ * specified object argument is null, the method throws a
+ * If this If the underlying field is final, the method throws an
+ * If the underlying field is of a primitive type, an unwrapping
+ * conversion is attempted to convert the new value to a value of
+ * a primitive type. If this attempt fails, the method throws an
+ * If, after possible unwrapping, the new value cannot be
+ * converted to the type of the underlying field by an identity or
+ * widening conversion, the method throws an
+ * If the underlying field is static, the class that declared the
+ * field is initialized if it has not already been initialized.
+ *
+ * The field is set to the possibly unwrapped and widened new value.
+ *
+ * If the field is hidden in the type of checkPermission method denies
+ * access to the class loader for the class.
+ * @see java.lang.ClassLoader
+ * @see SecurityManager#checkPermission
+ * @see java.lang.RuntimePermission
+ */
+ public ClassLoader getClassLoader() {
+ ClassLoader cl = getClassLoader0();
+ if (cl == null)
+ return null;
+ SecurityManager sm = System.getSecurityManager();
+ if (sm != null) {
+ ClassLoader ccl = ClassLoader.getCallerClassLoader();
+ if (ccl != null && ccl != cl && !cl.isAncestor(ccl)) {
+ sm.checkPermission(SecurityConstants.GET_CLASSLOADER_PERMISSION);
+ }
+ }
+ return cl;
+ }
+
+ // Package-private to allow ClassLoader access
+ native ClassLoader getClassLoader0();
+
+
+ /**
+ * Returns an array of TypeVariable objects that represent the
+ * type variables declared by the generic declaration represented by this
+ * GenericDeclaration object, in declaration order. Returns an
+ * array of length 0 if the underlying generic declaration declares no type
+ * variables.
+ *
+ * @return an array of TypeVariable objects that represent
+ * the type variables declared by this generic declaration
+ * @throws GenericSignatureFormatError if the generic
+ * signature of this generic declaration does not conform to
+ * the format specified in the Java Virtual Machine Specification,
+ * 3rd edition
+ * @since 1.5
+ */
+ public TypeVariableClass representing the superclass of the entity
+ * (class, interface, primitive type or void) represented by this
+ * Class. If this Class represents either the
+ * Object class, an interface, a primitive type, or void, then
+ * null is returned. If this object represents an array class then the
+ * Class object representing the Object class is
+ * returned.
+ *
+ * @return the superclass of the class represented by this object.
+ */
+ public native Class getSuperclass();
+
+
+ /**
+ * Returns the Type representing the direct superclass of
+ * the entity (class, interface, primitive type or void) represented by
+ * this Class.
+ *
+ * implements clause
+ * of the declaration of the class represented by this object. For
+ * example, given the declaration:
+ *
+ * suppose the value of
+ * class Shimmer implements FloorWax, DessertTopping { ... }
+ * s is an instance of
+ * Shimmer; the value of the expression:
+ *
+ * is the
+ * s.getClass().getInterfaces()[0]
+ *
Class object that represents interface
+ * FloorWax; and the value of:
+ *
+ * is the
+ * s.getClass().getInterfaces()[1]
+ *
Class object that represents interface
+ * DessertTopping.
+ *
+ * extends clause of the declaration of the
+ * interface represented by this object.
+ *
+ * Class representing the component type of an
+ * array. If this class does not represent an array class this method
+ * returns null.
+ *
+ * @return the Class representing the component type of this
+ * class if this class is an array
+ * @see java.lang.reflect.Array
+ * @since JDK1.1
+ */
+ public native Class getComponentType();
+
+
+ /**
+ * Returns the Java language modifiers for this class or interface, encoded
+ * in an integer. The modifiers consist of the Java Virtual Machine's
+ * constants for public, protected,
+ * private, final, static,
+ * abstract and interface; they should be decoded
+ * using the methods of class Modifier.
+ *
+ * public, private and protected
+ * modifiers are the same as those of its component type. If this
+ * Class represents a primitive type or void, its
+ * public modifier is always true, and its
+ * protected and private modifiers are always
+ * false. If this object represents an array class, a
+ * primitive type or void, then its final modifier is always
+ * true and its interface modifier is always
+ * false. The values of its other modifiers are not determined
+ * by this specification.
+ *
+ * int representing the modifiers for this class
+ * @see java.lang.reflect.Modifier
+ * @since JDK1.1
+ */
+ public native int getModifiers();
+
+
+ /**
+ * Gets the signers of this class.
+ *
+ * @return the signers of this class, or null if there are no signers. In
+ * particular, this method returns null if this object represents
+ * a primitive type or void.
+ * @since JDK1.1
+ */
+ public native Object[] getSigners();
+
+
+ /**
+ * Set the signers of this class.
+ */
+ native void setSigners(Object[] signers);
+
+
+ /**
+ * If this Class object represents a local or anonymous
+ * class within a method, returns a {@link
+ * java.lang.reflect.Method Method} object representing the
+ * immediately enclosing method of the underlying class. Returns
+ * null otherwise.
+ *
+ * In particular, this method returns null if the underlying
+ * class is a local or anonymous class immediately enclosed by a type
+ * declaration, instance initializer or static initializer.
+ *
+ * @return the immediately enclosing method of the underlying class, if
+ * that class is a local or anonymous class; otherwise null.
+ * @since 1.5
+ */
+ public Method getEnclosingMethod() {
+ EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
+
+ if (enclosingInfo == null)
+ return null;
+ else {
+ if (!enclosingInfo.isMethod())
+ return null;
+
+ MethodRepository typeInfo = MethodRepository.make(enclosingInfo.getDescriptor(),
+ getFactory());
+ Class returnType = toClass(typeInfo.getReturnType());
+ Type [] parameterTypes = typeInfo.getParameterTypes();
+ Class[] parameterClasses = new Class[parameterTypes.length];
+
+ // Convert Types to Classes; returned types *should*
+ // be class objects since the methodDescriptor's used
+ // don't have generics information
+ for(int i = 0; i < parameterClasses.length; i++)
+ parameterClasses[i] = toClass(parameterTypes[i]);
+
+ /*
+ * Loop over all declared methods; match method name,
+ * number of and type of parameters, *and* return
+ * type. Matching return type is also necessary
+ * because of covariant returns, etc.
+ */
+ for(Method m: enclosingInfo.getEnclosingClass().getDeclaredMethods()) {
+ if (m.getName().equals(enclosingInfo.getName()) ) {
+ Class[] candidateParamClasses = m.getParameterTypes();
+ if (candidateParamClasses.length == parameterClasses.length) {
+ boolean matches = true;
+ for(int i = 0; i < candidateParamClasses.length; i++) {
+ if (!candidateParamClasses[i].equals(parameterClasses[i])) {
+ matches = false;
+ break;
+ }
+ }
+
+ if (matches) { // finally, check return type
+ if (m.getReturnType().equals(returnType) )
+ return m;
+ }
+ }
+ }
+ }
+
+ throw new InternalError("Enclosing method not found");
+ }
+ }
+
+ private native Object[] getEnclosingMethod0();
+
+ private EnclosingMethodInfo getEnclosingMethodInfo() {
+ Object[] enclosingInfo = getEnclosingMethod0();
+ if (enclosingInfo == null)
+ return null;
+ else {
+ return new EnclosingMethodInfo(enclosingInfo);
+ }
+ }
+
+ private final static class EnclosingMethodInfo {
+ private Class enclosingClass;
+ private String name;
+ private String descriptor;
+
+ private EnclosingMethodInfo(Object[] enclosingInfo) {
+ if (enclosingInfo.length != 3)
+ throw new InternalError("Malformed enclosing method information");
+ try {
+ // The array is expected to have three elements:
+
+ // the immediately enclosing class
+ enclosingClass = (Class) enclosingInfo[0];
+ assert(enclosingClass != null);
+
+ // the immediately enclosing method or constructor's
+ // name (can be null).
+ name = (String) enclosingInfo[1];
+
+ // the immediately enclosing method or constructor's
+ // descriptor (null iff name is).
+ descriptor = (String) enclosingInfo[2];
+ assert((name != null && descriptor != null) || name == descriptor);
+ } catch (ClassCastException cce) {
+ throw new InternalError("Invalid type in enclosing method information");
+ }
+ }
+
+ boolean isPartial() {
+ return enclosingClass == null || name == null || descriptor == null;
+ }
+
+ boolean isConstructor() { return !isPartial() && "Class object
+ * is a member of another class, returns the Class object
+ * representing the class in which it was declared. This method returns
+ * null if this class or interface is not a member of any other class. If
+ * this Class object represents an array class, a primitive
+ * type, or void,then this method returns null.
+ *
+ * @return the declaring class for this class
+ * @since JDK1.1
+ */
+ public native Class getDeclaringClass();
+
+
+ /**
+ * Returns the immediately enclosing class of the underlying
+ * class. If the underlying class is a top level class this
+ * method returns null.
+ * @return the immediately enclosing class of the underlying class
+ * @since 1.5
+ */
+ public Class getEnclosingClass() {
+ // There are five kinds of classes (or interfaces):
+ // a) Top level classes
+ // b) Nested classes (static member classes)
+ // c) Inner classes (non-static member classes)
+ // d) Local classes (named classes declared within a method)
+ // e) Anonymous classes
+
+
+ // JVM Spec 4.8.6: A class must have an EnclosingMethod
+ // attribute if and only if it is a local class or an
+ // anonymous class.
+ EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
+
+ if (enclosingInfo == null) {
+ // This is a top level or a nested class or an inner class (a, b, or c)
+ return getDeclaringClass();
+ } else {
+ Class enclosingClass = enclosingInfo.getEnclosingClass();
+ // This is a local class or an anonymous class (d or e)
+ if (enclosingClass == this || enclosingClass == null)
+ throw new InternalError("Malformed enclosing method information");
+ else
+ return enclosingClass;
+ }
+ }
+
+ /**
+ * Returns the simple name of the underlying class as given in the
+ * source code. Returns an empty string if the underlying class is
+ * anonymous.
+ *
+ * Class objects representing all
+ * the public classes and interfaces that are members of the class
+ * represented by this Class object. This includes public
+ * class and interface members inherited from superclasses and public class
+ * and interface members declared by the class. This method returns an
+ * array of length 0 if this Class object has no public member
+ * classes or interfaces. This method also returns an array of length 0 if
+ * this Class object represents a primitive type, an array
+ * class, or void.
+ *
+ * @return the array of Class objects representing the public
+ * members of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Class[] getClasses() {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+
+ // Privileged so this implementation can look at DECLARED classes,
+ // something the caller might not have privilege to do. The code here
+ // is allowed to look at DECLARED classes because (1) it does not hand
+ // out anything other than public members and (2) public member access
+ // has already been ok'd by the SecurityManager.
+
+ Class[] result = (Class[]) java.security.AccessController.doPrivileged
+ (new java.security.PrivilegedAction() {
+ public Object run() {
+ java.util.ListField objects reflecting all
+ * the accessible public fields of the class or interface represented by
+ * this Class object. The elements in the array returned are
+ * not sorted and are not in any particular order. This method returns an
+ * array of length 0 if the class or interface has no accessible public
+ * fields, or if it represents an array class, a primitive type, or void.
+ *
+ * Class object represents a class,
+ * this method returns the public fields of this class and of all its
+ * superclasses. If this Class object represents an
+ * interface, this method returns the fields of this interface and of all
+ * its superinterfaces.
+ *
+ * Array to
+ * manipulate arrays.
+ *
+ * Field objects representing the
+ * public fields
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Field[] getFields() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ return copyFields(privateGetPublicFields(null));
+ }
+
+
+ /**
+ * Returns an array containing Method objects reflecting all
+ * the public member methods of the class or interface represented
+ * by this Class object, including those declared by the class
+ * or interface and those inherited from superclasses and
+ * superinterfaces. Array classes return all the (public) member methods
+ * inherited from the Object class. The elements in the array
+ * returned are not sorted and are not in any particular order. This
+ * method returns an array of length 0 if this Class object
+ * represents a class or interface that has no public member methods, or if
+ * this Class object represents a primitive type or void.
+ *
+ * <clinit> is not
+ * included in the returned array. If the class declares multiple public
+ * member methods with the same parameter types, they are all included in
+ * the returned array.
+ *
+ * Method objects representing the
+ * public methods of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Method[] getMethods() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ return copyMethods(privateGetPublicMethods());
+ }
+
+
+ /**
+ * Returns an array containing Constructor objects reflecting
+ * all the public constructors of the class represented by this
+ * Class object. An array of length 0 is returned if the
+ * class has no public constructors, or if the class is an array class, or
+ * if the class reflects a primitive type or void.
+ *
+ * Note that while this method returns an array of {@code
+ * ConstructorConstructor objects representing the
+ * public constructors of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Constructor[] getConstructors() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ return copyConstructors(privateGetDeclaredConstructors(true));
+ }
+
+
+ /**
+ * Returns a Field object that reflects the specified public
+ * member field of the class or interface represented by this
+ * Class object. The name parameter is a
+ * String specifying the simple name of the desired field.
+ *
+ *
+ *
+ *
+ * NoSuchFieldException
+ * is thrown.Field object of this class specified by
+ * name
+ * @exception NoSuchFieldException if a field with the specified name is
+ * not found.
+ * @exception NullPointerException if name is null
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Field getField(String name)
+ throws NoSuchFieldException, SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ Field field = getField0(name);
+ if (field == null) {
+ throw new NoSuchFieldException(name);
+ }
+ return field;
+ }
+
+
+ /**
+ * Returns a Method object that reflects the specified public
+ * member method of the class or interface represented by this
+ * Class object. The name parameter is a
+ * String specifying the simple name of the desired method. The
+ * parameterTypes parameter is an array of Class
+ * objects that identify the method's formal parameter types, in declared
+ * order. If parameterTypes is null, it is
+ * treated as if it were an empty array.
+ *
+ * name is "{@code NoSuchMethodException is raised. Otherwise, the method to
+ * be reflected is determined by the algorithm that follows. Let C be the
+ * class represented by this object:
+ *
+ *
+ *
+ * To find a matching method in a class C: If C declares exactly one
+ * public method with the specified name and exactly the same formal
+ * parameter types, that is the method reflected. If more than one such
+ * method is found in C, and one of these methods has a return type that is
+ * more specific than any of the others, that method is reflected;
+ * otherwise one of the methods is chosen arbitrarily.
+ *
+ * Method object that matches the specified
+ * name and parameterTypes
+ * @exception NoSuchMethodException if a matching method is not found
+ * or if the name is "<init>"or "<clinit>".
+ * @exception NullPointerException if name is null
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Method getMethod(String name, Class... parameterTypes)
+ throws NoSuchMethodException, SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.PUBLIC, ClassLoader.getCallerClassLoader());
+ Method method = getMethod0(name, parameterTypes);
+ if (method == null) {
+ throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
+ }
+ return method;
+ }
+
+
+ /**
+ * Returns a Constructor object that reflects the specified
+ * public constructor of the class represented by this Class
+ * object. The parameterTypes parameter is an array of
+ * Class objects that identify the constructor's formal
+ * parameter types, in declared order.
+ *
+ * If this Class object represents an inner class
+ * declared in a non-static context, the formal parameter types
+ * include the explicit enclosing instance as the first parameter.
+ *
+ * Class object whose formal parameter
+ * types match those specified by parameterTypes.
+ *
+ * @param parameterTypes the parameter array
+ * @return the Constructor object of the public constructor that
+ * matches the specified parameterTypes
+ * @exception NoSuchMethodException if a matching method is not found.
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public ConstructorClass objects reflecting all the
+ * classes and interfaces declared as members of the class represented by
+ * this Class object. This includes public, protected, default
+ * (package) access, and private classes and interfaces declared by the
+ * class, but excludes inherited classes and interfaces. This method
+ * returns an array of length 0 if the class declares no classes or
+ * interfaces as members, or if this Class object represents a
+ * primitive type, an array class, or void.
+ *
+ * @return the array of Class objects representing all the
+ * declared members of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Class[] getDeclaredClasses() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ return getDeclaredClasses0();
+ }
+
+
+ /**
+ * Returns an array of Field objects reflecting all the fields
+ * declared by the class or interface represented by this
+ * Class object. This includes public, protected, default
+ * (package) access, and private fields, but excludes inherited fields.
+ * The elements in the array returned are not sorted and are not in any
+ * particular order. This method returns an array of length 0 if the class
+ * or interface declares no fields, or if this Class object
+ * represents a primitive type, an array class, or void.
+ *
+ * Field objects representing all the
+ * declared fields of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Field[] getDeclaredFields() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ return copyFields(privateGetDeclaredFields(false));
+ }
+
+
+ /**
+ * Returns an array of Method objects reflecting all the
+ * methods declared by the class or interface represented by this
+ * Class object. This includes public, protected, default
+ * (package) access, and private methods, but excludes inherited methods.
+ * The elements in the array returned are not sorted and are not in any
+ * particular order. This method returns an array of length 0 if the class
+ * or interface declares no methods, or if this Class object
+ * represents a primitive type, an array class, or void. The class
+ * initialization method <clinit> is not included in the
+ * returned array. If the class declares multiple public member methods
+ * with the same parameter types, they are all included in the returned
+ * array.
+ *
+ * Method objects representing all the
+ * declared methods of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Method[] getDeclaredMethods() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ return copyMethods(privateGetDeclaredMethods(false));
+ }
+
+
+ /**
+ * Returns an array of Constructor objects reflecting all the
+ * constructors declared by the class represented by this
+ * Class object. These are public, protected, default
+ * (package) access, and private constructors. The elements in the array
+ * returned are not sorted and are not in any particular order. If the
+ * class has a default constructor, it is included in the returned array.
+ * This method returns an array of length 0 if this Class
+ * object represents an interface, a primitive type, an array class, or
+ * void.
+ *
+ * Constructor objects representing all the
+ * declared constructors of this class
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Constructor[] getDeclaredConstructors() throws SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ return copyConstructors(privateGetDeclaredConstructors(false));
+ }
+
+
+ /**
+ * Returns a Field object that reflects the specified declared
+ * field of the class or interface represented by this Class
+ * object. The name parameter is a String that
+ * specifies the simple name of the desired field. Note that this method
+ * will not reflect the length field of an array class.
+ *
+ * @param name the name of the field
+ * @return the Field object for the specified field in this
+ * class
+ * @exception NoSuchFieldException if a field with the specified name is
+ * not found.
+ * @exception NullPointerException if name is null
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Field getDeclaredField(String name)
+ throws NoSuchFieldException, SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ Field field = searchFields(privateGetDeclaredFields(false), name);
+ if (field == null) {
+ throw new NoSuchFieldException(name);
+ }
+ return field;
+ }
+
+
+ /**
+ * Returns a Method object that reflects the specified
+ * declared method of the class or interface represented by this
+ * Class object. The name parameter is a
+ * String that specifies the simple name of the desired
+ * method, and the parameterTypes parameter is an array of
+ * Class objects that identify the method's formal parameter
+ * types, in declared order. If more than one method with the same
+ * parameter types is declared in a class, and one of these methods has a
+ * return type that is more specific than any of the others, that method is
+ * returned; otherwise one of the methods is chosen arbitrarily. If the
+ * name is "<init>"or "<clinit>" a NoSuchMethodException
+ * is raised.
+ *
+ * @param name the name of the method
+ * @param parameterTypes the parameter array
+ * @return the Method object for the method of this class
+ * matching the specified name and parameters
+ * @exception NoSuchMethodException if a matching method is not found.
+ * @exception NullPointerException if name is null
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Method getDeclaredMethod(String name, Class... parameterTypes)
+ throws NoSuchMethodException, SecurityException {
+ // be very careful not to change the stack depth of this
+ // checkMemberAccess call for security reasons
+ // see java.lang.SecurityManager.checkMemberAccess
+ checkMemberAccess(Member.DECLARED, ClassLoader.getCallerClassLoader());
+ Method method = searchMethods(privateGetDeclaredMethods(false), name, parameterTypes);
+ if (method == null) {
+ throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
+ }
+ return method;
+ }
+
+
+ /**
+ * Returns a Constructor object that reflects the specified
+ * constructor of the class or interface represented by this
+ * Class object. The parameterTypes parameter is
+ * an array of Class objects that identify the constructor's
+ * formal parameter types, in declared order.
+ *
+ * If this Class object represents an inner class
+ * declared in a non-static context, the formal parameter types
+ * include the explicit enclosing instance as the first parameter.
+ *
+ * @param parameterTypes the parameter array
+ * @return The Constructor object for the constructor with the
+ * specified parameter list
+ * @exception NoSuchMethodException if a matching method is not found.
+ * @exception SecurityException
+ * If a security manager, s, is present and any of the
+ * following conditions is met:
+ *
+ *
+ *
+ *
+ *
+ * @since JDK1.1
+ */
+ public Constructor
+ *
+ *
+ *
+ * @param name name of the desired resource
+ * @return A {@link java.io.InputStream} object or null if
+ * no resource with this name is found
+ * @throws NullPointerException If name is null
+ * @since JDK1.1
+ */
+ public InputStream getResourceAsStream(String name) {
+ name = resolveName(name);
+ ClassLoader cl = getClassLoader0();
+ if (cl==null) {
+ // A system class.
+ return ClassLoader.getSystemResourceAsStream(name);
+ }
+ return cl.getResourceAsStream(name);
+ }
+
+ /**
+ * Finds a resource with a given name. The rules for searching resources
+ * associated with a given class are implemented by the defining
+ * {@linkplain ClassLoader class loader} of the class. This method
+ * delegates to this object's class loader. If this object was loaded by
+ * the bootstrap class loader, the method delegates to {@link
+ * ClassLoader#getSystemResource}.
+ *
+ *
+ *
+ *
+ * modified_package_name/name
+ *
+ *
+ *
+ *
+ * @param name name of the desired resource
+ * @return A {@link java.net.URL} object or null if no
+ * resource with this name is found
+ * @since JDK1.1
+ */
+ public java.net.URL getResource(String name) {
+ name = resolveName(name);
+ ClassLoader cl = getClassLoader0();
+ if (cl==null) {
+ // A system class.
+ return ClassLoader.getSystemResource(name);
+ }
+ return cl.getResource(name);
+ }
+
+
+
+ /** protection domain returned when the internal domain is null */
+ private static java.security.ProtectionDomain allPermDomain;
+
+
+ /**
+ * Returns the
+ *
+ *
+ * modified_package_name/name
+ *
ProtectionDomain of this class. If there is a
+ * security manager installed, this method first calls the security
+ * manager's checkPermission method with a
+ * RuntimePermission("getProtectionDomain") permission to
+ * ensure it's ok to get the
+ * ProtectionDomain.
+ *
+ * @return the ProtectionDomain of this class
+ *
+ * @throws SecurityException
+ * if a security manager exists and its
+ * checkPermission method doesn't allow
+ * getting the ProtectionDomain.
+ *
+ * @see java.security.ProtectionDomain
+ * @see SecurityManager#checkPermission
+ * @see java.lang.RuntimePermission
+ * @since 1.2
+ */
+ public java.security.ProtectionDomain getProtectionDomain() {
+ SecurityManager sm = System.getSecurityManager();
+ if (sm != null) {
+ sm.checkPermission(SecurityConstants.GET_PD_PERMISSION);
+ }
+ java.security.ProtectionDomain pd = getProtectionDomain0();
+ if (pd == null) {
+ if (allPermDomain == null) {
+ java.security.Permissions perms =
+ new java.security.Permissions();
+ perms.add(SecurityConstants.ALL_PERMISSION);
+ allPermDomain =
+ new java.security.ProtectionDomain(null, perms);
+ }
+ pd = allPermDomain;
+ }
+ return pd;
+ }
+
+
+ /**
+ * Returns the ProtectionDomain of this class.
+ */
+ private native java.security.ProtectionDomain getProtectionDomain0();
+
+
+ /**
+ * Set the ProtectionDomain for this class. Called by
+ * ClassLoader.defineClass.
+ */
+ native void setProtectionDomain0(java.security.ProtectionDomain pd);
+
+
+ /*
+ * Return the Virtual Machine's Class object for the named
+ * primitive type.
+ */
+ static native Class getPrimitiveClass(String name);
+
+
+ /*
+ * Check if client is allowed to access members. If access is denied,
+ * throw a SecurityException.
+ *
+ * Be very careful not to change the stack depth of this checkMemberAccess
+ * call for security reasons.
+ * See java.lang.SecurityManager.checkMemberAccess.
+ *
+ *
+ *
+ * A new handle is generated for the initial time the class descriptor
+ * is written into the stream. Future references to the class descriptor
+ * are written as references to the initial class descriptor instance.
+ *
+ * @see java.io.ObjectStreamClass
+ */
+ private static final ObjectStreamField[] serialPersistentFields =
+ new ObjectStreamField[0];
+
+
+ /**
+ * Returns the assertion status that would be assigned to this
+ * class if it were to be initialized at the time this method is invoked.
+ * If this class has had its assertion status set, the most recent
+ * setting will be returned; otherwise, if any package default assertion
+ * status pertains to this class, the most recent setting for the most
+ * specific pertinent package default assertion status is returned;
+ * otherwise, if this class is not a system class (i.e., it has a
+ * class loader) its class loader's default assertion status is returned;
+ * otherwise, the system class default assertion status is returned.
+ * TC_CLASS ClassDescriptor
+ * A ClassDescriptor is a special cased serialization of
+ * a java.io.ObjectStreamClass instance.
+ * Constructor provides information about, and access to, a single
+ * constructor for a class.
+ *
+ * Constructor permits widening conversions to occur when matching the
+ * actual parameters to newInstance() with the underlying
+ * constructor's formal parameters, but throws an
+ * IllegalArgumentException if a narrowing conversion would occur.
+ *
+ * @param Class object representing the class that declares
+ * the constructor represented by this Constructor object.
+ */
+ public ClassConstructor object, as an integer. The
+ * Modifier class should be used to decode the modifiers.
+ *
+ * @see Modifier
+ */
+ public int getModifiers() {
+ return modifiers;
+ }
+
+ /**
+ * Returns an array of TypeVariable objects that represent the
+ * type variables declared by the generic declaration represented by this
+ * GenericDeclaration object, in declaration order. Returns an
+ * array of length 0 if the underlying generic declaration declares no type
+ * variables.
+ *
+ * @return an array of TypeVariable objects that represent
+ * the type variables declared by this generic declaration
+ * @throws GenericSignatureFormatError if the generic
+ * signature of this generic declaration does not conform to
+ * the format specified in the Java Virtual Machine Specification,
+ * 3rd edition
+ * @since 1.5
+ */
+ public TypeVariableClass objects that represent the formal
+ * parameter types, in declaration order, of the constructor
+ * represented by this Constructor object. Returns an array of
+ * length 0 if the underlying constructor takes no parameters.
+ *
+ * @return the parameter types for the constructor this object
+ * represents
+ */
+ public Class[] getParameterTypes() {
+ return (Class[]) parameterTypes.clone();
+ }
+
+
+ /**
+ * Returns an array of Type objects that represent the formal
+ * parameter types, in declaration order, of the method represented by
+ * this Constructor object. Returns an array of length 0 if the
+ * underlying method takes no parameters.
+ *
+ * Class objects that represent the types
+ * of exceptions declared to be thrown by the underlying constructor
+ * represented by this Constructor object. Returns an array of
+ * length 0 if the constructor declares no exceptions in its throws clause.
+ *
+ * @return the exception types declared as being thrown by the
+ * constructor this object represents
+ */
+ public Class[] getExceptionTypes() {
+ return (Class[])exceptionTypes.clone();
+ }
+
+
+ /**
+ * Returns an array of Type objects that represent the
+ * exceptions declared to be thrown by this Constructor object.
+ * Returns an array of length 0 if the underlying method declares
+ * no exceptions in its throws clause.
+ *
+ * Constructor against the specified object.
+ * Returns true if the objects are the same. Two Constructor objects are
+ * the same if they were declared by the same class and have the
+ * same formal parameter types.
+ */
+ public boolean equals(Object obj) {
+ if (obj != null && obj instanceof Constructor) {
+ Constructor other = (Constructor)obj;
+ if (getDeclaringClass() == other.getDeclaringClass()) {
+ /* Avoid unnecessary cloning */
+ Class[] params1 = parameterTypes;
+ Class[] params2 = other.parameterTypes;
+ if (params1.length == params2.length) {
+ for (int i = 0; i < params1.length; i++) {
+ if (params1[i] != params2[i])
+ return false;
+ }
+ return true;
+ }
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Returns a hashcode for this Constructor. The hashcode is
+ * the same as the hashcode for the underlying constructor's
+ * declaring class name.
+ */
+ public int hashCode() {
+ return getDeclaringClass().getName().hashCode();
+ }
+
+ /**
+ * Returns a string describing this Constructor. The string is
+ * formatted as the constructor access modifiers, if any,
+ * followed by the fully-qualified name of the declaring class,
+ * followed by a parenthesized, comma-separated list of the
+ * constructor's formal parameter types. For example:
+ *
+ * public java.util.Hashtable(int,float)
+ *
+ *
+ * Constructor,
+ * including type parameters. The string is formatted as the
+ * constructor access modifiers, if any, followed by an
+ * angle-bracketed comma separated list of the constructor's type
+ * parameters, if any, followed by the fully-qualified name of the
+ * declaring class, followed by a parenthesized, comma-separated
+ * list of the constructor's generic formal parameter types.
+ *
+ * If this constructor was declared to take a variable number of
+ * arguments, instead of denoting the last parameter as
+ * "Type[]", it is denoted as
+ * "Type...".
+ *
+ * A space is used to separate access modifiers from one another
+ * and from the type parameters or return type. If there are no
+ * type parameters, the type parameter list is elided; if the type
+ * parameter list is present, a space separates the list from the
+ * class name. If the constructor is declared to throw
+ * exceptions, the parameter list is followed by a space, followed
+ * by the word "throws" followed by a
+ * comma-separated list of the thrown exception types.
+ *
+ * Constructor,
+ * include type parameters
+ *
+ * @since 1.5
+ */
+ public String toGenericString() {
+ try {
+ StringBuilder sb = new StringBuilder();
+ int mod = getModifiers() & LANGUAGE_MODIFIERS;
+ if (mod != 0) {
+ sb.append(Modifier.toString(mod) + " ");
+ }
+ Type[] typeparms = getTypeParameters();
+ if (typeparms.length > 0) {
+ boolean first = true;
+ sb.append("<");
+ for(Type typeparm: typeparms) {
+ if (!first)
+ sb.append(",");
+ if (typeparm instanceof Class)
+ sb.append(((Class)typeparm).getName());
+ else
+ sb.append(typeparm.toString());
+ first = false;
+ }
+ sb.append("> ");
+ }
+ sb.append(Field.getTypeName(getDeclaringClass()));
+ sb.append("(");
+ Type[] params = getGenericParameterTypes();
+ for (int j = 0; j < params.length; j++) {
+ String param = (params[j] instanceof Class)?
+ Field.getTypeName((Class)params[j]):
+ (params[j].toString());
+ if (isVarArgs() && (j == params.length - 1)) // replace T[] with T...
+ param = param.replaceFirst("\\[\\]$", "...");
+ sb.append(param);
+ if (j < (params.length - 1))
+ sb.append(",");
+ }
+ sb.append(")");
+ Type[] exceptions = getGenericExceptionTypes();
+ if (exceptions.length > 0) {
+ sb.append(" throws ");
+ for (int k = 0; k < exceptions.length; k++) {
+ sb.append((exceptions[k] instanceof Class)?
+ ((Class)exceptions[k]).getName():
+ exceptions[k].toString());
+ if (k < (exceptions.length - 1))
+ sb.append(",");
+ }
+ }
+ return sb.toString();
+ } catch (Exception e) {
+ return "<" + e + ">";
+ }
+ }
+
+ /**
+ * Uses the constructor represented by this Constructor object to
+ * create and initialize a new instance of the constructor's
+ * declaring class, with the specified initialization parameters.
+ * Individual parameters are automatically unwrapped to match
+ * primitive formal parameters, and both primitive and reference
+ * parameters are subject to method invocation conversions as necessary.
+ *
+ * initargs array may be of length 0 or null.
+ *
+ * Constructor object
+ * enforces Java language access control and the underlying
+ * constructor is inaccessible.
+ * @exception IllegalArgumentException if the number of actual
+ * and formal parameters differ; if an unwrapping
+ * conversion for primitive arguments fails; or if,
+ * after possible unwrapping, a parameter value
+ * cannot be converted to the corresponding formal
+ * parameter type by a method invocation conversion; if
+ * this constructor pertains to an enum type.
+ * @exception InstantiationException if the class that declares the
+ * underlying constructor represents an abstract class.
+ * @exception InvocationTargetException if the underlying constructor
+ * throws an exception.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ */
+ public T newInstance(Object ... initargs)
+ throws InstantiationException, IllegalAccessException,
+ IllegalArgumentException, InvocationTargetException
+ {
+ if (!override) {
+ if (!Reflection.quickCheckMemberAccess(clazz, modifiers)) {
+ Class caller = Reflection.getCallerClass(2);
+ if (securityCheckCache != caller) {
+ Reflection.ensureMemberAccess(caller, clazz, null, modifiers);
+ securityCheckCache = caller;
+ }
+ }
+ }
+ if ((clazz.getModifiers() & Modifier.ENUM) != 0)
+ throw new IllegalArgumentException("Cannot reflectively create enum objects");
+ if (constructorAccessor == null) acquireConstructorAccessor();
+ return (T) constructorAccessor.newInstance(initargs);
+ }
+
+ /**
+ * Returns true if this constructor was declared to take
+ * a variable number of arguments; returns false
+ * otherwise.
+ *
+ * @return true if an only if this constructor was declared to
+ * take a variable number of arguments.
+ * @since 1.5
+ */
+ public boolean isVarArgs() {
+ return (getModifiers() & Modifier.VARARGS) != 0;
+ }
+
+ /**
+ * Returns true if this constructor is a synthetic
+ * constructor; returns false otherwise.
+ *
+ * @return true if and only if this constructor is a synthetic
+ * constructor as defined by the Java Language Specification.
+ * @since 1.5
+ */
+ public boolean isSynthetic() {
+ return Modifier.isSynthetic(getModifiers());
+ }
+
+ // NOTE that there is no synchronization used here. It is correct
+ // (though not efficient) to generate more than one
+ // ConstructorAccessor for a given Constructor. However, avoiding
+ // synchronization will probably make the implementation more
+ // scalable.
+ private void acquireConstructorAccessor() {
+ // First check to see if one has been created yet, and take it
+ // if so.
+ ConstructorAccessor tmp = null;
+ if (root != null) tmp = root.getConstructorAccessor();
+ if (tmp != null) {
+ constructorAccessor = tmp;
+ return;
+ }
+ // Otherwise fabricate one and propagate it up to the root
+ tmp = reflectionFactory.newConstructorAccessor(this);
+ setConstructorAccessor(tmp);
+ }
+
+ // Returns ConstructorAccessor for this Constructor object, not
+ // looking up the chain to the root
+ ConstructorAccessor getConstructorAccessor() {
+ return constructorAccessor;
+ }
+
+ // Sets the ConstructorAccessor for this Constructor object and
+ // (recursively) its root
+ void setConstructorAccessor(ConstructorAccessor accessor) {
+ constructorAccessor = accessor;
+ // Propagate up
+ if (root != null) {
+ root.setConstructorAccessor(accessor);
+ }
+ }
+
+ int getSlot() {
+ return slot;
+ }
+
+ String getSignature() {
+ return signature;
+ }
+
+ byte[] getRawAnnotations() {
+ return annotations;
+ }
+
+ byte[] getRawParameterAnnotations() {
+ return parameterAnnotations;
+ }
+
+ /**
+ * @throws NullPointerException {@inheritDoc}
+ * @since 1.5
+ */
+ public Field provides information about, and dynamic access to, a
+ * single field of a class or an interface. The reflected field may
+ * be a class (static) field or an instance field.
+ *
+ * Field permits widening conversions to occur during a get or
+ * set access operation, but throws an IllegalArgumentException if a
+ * narrowing conversion would occur.
+ *
+ * @see Member
+ * @see java.lang.Class
+ * @see java.lang.Class#getFields()
+ * @see java.lang.Class#getField(String)
+ * @see java.lang.Class#getDeclaredFields()
+ * @see java.lang.Class#getDeclaredField(String)
+ *
+ * @author Kenneth Russell
+ * @author Nakul Saraiya
+ */
+public final
+class Field extends AccessibleObject implements Member {
+
+ private Class clazz;
+ private int slot;
+ // This is guaranteed to be interned by the VM in the 1.4
+ // reflection implementation
+ private String name;
+ private Class type;
+ private int modifiers;
+ // Generics and annotations support
+ private transient String signature;
+ // generic info repository; lazily initialized
+ private transient FieldRepository genericInfo;
+ private byte[] annotations;
+ // Cached field accessor created without override
+ private FieldAccessor fieldAccessor;
+ // Cached field accessor created with override
+ private FieldAccessor overrideFieldAccessor;
+ // For sharing of FieldAccessors. This branching structure is
+ // currently only two levels deep (i.e., one root Field and
+ // potentially many Field objects pointing to it.)
+ private Field root;
+
+ // More complicated security check cache needed here than for
+ // Class.newInstance() and Constructor.newInstance()
+ private Class securityCheckCache;
+ private Class securityCheckTargetClassCache;
+
+ // Generics infrastructure
+
+ private String getGenericSignature() {return signature;}
+
+ // Accessor for factory
+ private GenericsFactory getFactory() {
+ Class c = getDeclaringClass();
+ // create scope and factory
+ return CoreReflectionFactory.make(c, ClassScope.make(c));
+ }
+
+ // Accessor for generic info repository
+ private FieldRepository getGenericInfo() {
+ // lazily initialize repository if necessary
+ if (genericInfo == null) {
+ // create and cache generic info repository
+ genericInfo = FieldRepository.make(getGenericSignature(),
+ getFactory());
+ }
+ return genericInfo; //return cached repository
+ }
+
+
+ /**
+ * Package-private constructor used by ReflectAccess to enable
+ * instantiation of these objects in Java code from the java.lang
+ * package via sun.reflect.LangReflectAccess.
+ */
+ Field(Class declaringClass,
+ String name,
+ Class type,
+ int modifiers,
+ int slot,
+ String signature,
+ byte[] annotations)
+ {
+ this.clazz = declaringClass;
+ this.name = name;
+ this.type = type;
+ this.modifiers = modifiers;
+ this.slot = slot;
+ this.signature = signature;
+ this.annotations = annotations;
+ }
+
+ /**
+ * Package-private routine (exposed to java.lang.Class via
+ * ReflectAccess) which returns a copy of this Field. The copy's
+ * "root" field points to this Field.
+ */
+ Field copy() {
+ // This routine enables sharing of FieldAccessor objects
+ // among Field objects which refer to the same underlying
+ // method in the VM. (All of this contortion is only necessary
+ // because of the "accessibility" bit in AccessibleObject,
+ // which implicitly requires that new java.lang.reflect
+ // objects be fabricated for each reflective call on Class
+ // objects.)
+ Field res = new Field(clazz, name, type, modifiers, slot, signature, annotations);
+ res.root = this;
+ // Might as well eagerly propagate this if already present
+ res.fieldAccessor = fieldAccessor;
+ res.overrideFieldAccessor = overrideFieldAccessor;
+ return res;
+ }
+
+ /**
+ * Returns the Class object representing the class or interface
+ * that declares the field represented by this Field object.
+ */
+ public Class getDeclaringClass() {
+ return clazz;
+ }
+
+ /**
+ * Returns the name of the field represented by this Field object.
+ */
+ public String getName() {
+ return name;
+ }
+
+ /**
+ * Returns the Java language modifiers for the field represented
+ * by this Field object, as an integer. The Modifier class should
+ * be used to decode the modifiers.
+ *
+ * @see Modifier
+ */
+ public int getModifiers() {
+ return modifiers;
+ }
+
+ /**
+ * Returns true if this field represents an element of
+ * an enumerated type; returns false otherwise.
+ *
+ * @return true if and only if this field represents an element of
+ * an enumerated type.
+ * @since 1.5
+ */
+ public boolean isEnumConstant() {
+ return (getModifiers() & Modifier.ENUM) != 0;
+ }
+
+ /**
+ * Returns true if this field is a synthetic
+ * field; returns false otherwise.
+ *
+ * @return true if and only if this field is a synthetic
+ * field as defined by the Java Language Specification.
+ * @since 1.5
+ */
+ public boolean isSynthetic() {
+ return Modifier.isSynthetic(getModifiers());
+ }
+
+ /**
+ * Returns a Class object that identifies the
+ * declared type for the field represented by this
+ * Field object.
+ *
+ * @return a Class object identifying the declared
+ * type of the field represented by this object
+ */
+ public Class getType() {
+ return type;
+ }
+
+ /**
+ * Returns a Type object that represents the declared type for
+ * the field represented by this Field object.
+ *
+ * Field against the specified object. Returns
+ * true if the objects are the same. Two Field objects are the same if
+ * they were declared by the same class and have the same name
+ * and type.
+ */
+ public boolean equals(Object obj) {
+ if (obj != null && obj instanceof Field) {
+ Field other = (Field)obj;
+ return (getDeclaringClass() == other.getDeclaringClass())
+ && (getName() == other.getName())
+ && (getType() == other.getType());
+ }
+ return false;
+ }
+
+ /**
+ * Returns a hashcode for this Field. This is computed as the
+ * exclusive-or of the hashcodes for the underlying field's
+ * declaring class name and its name.
+ */
+ public int hashCode() {
+ return getDeclaringClass().getName().hashCode() ^ getName().hashCode();
+ }
+
+ /**
+ * Returns a string describing this Field. The format is
+ * the access modifiers for the field, if any, followed
+ * by the field type, followed by a space, followed by
+ * the fully-qualified name of the class declaring the field,
+ * followed by a period, followed by the name of the field.
+ * For example:
+ *
+ * public static final int java.lang.Thread.MIN_PRIORITY
+ * private int java.io.FileDescriptor.fd
+ *
+ *
+ * Field, including
+ * its generic type. The format is the access modifiers for the
+ * field, if any, followed by the generic field type, followed by
+ * a space, followed by the fully-qualified name of the class
+ * declaring the field, followed by a period, followed by the name
+ * of the field.
+ *
+ * Field, including
+ * its generic type
+ *
+ * @since 1.5
+ */
+ public String toGenericString() {
+ int mod = getModifiers();
+ Type fieldType = getGenericType();
+ return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
+ + ((fieldType instanceof Class) ?
+ getTypeName((Class)fieldType): fieldType.toString())+ " "
+ + getTypeName(getDeclaringClass()) + "."
+ + getName());
+ }
+
+ /**
+ * Returns the value of the field represented by this Field, on
+ * the specified object. The value is automatically wrapped in an
+ * object if it has a primitive type.
+ *
+ * obj argument
+ * is ignored; it may be null.
+ *
+ * obj argument is null, the method throws a
+ * NullPointerException. If the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field, the method throws an IllegalArgumentException.
+ *
+ * Field object enforces Java language access control, and
+ * the underlying field is inaccessible, the method throws an
+ * IllegalAccessException.
+ * If the underlying field is static, the class that declared the
+ * field is initialized if it has not already been initialized.
+ *
+ * obj,
+ * the field's value is obtained according to the preceding rules.
+ *
+ * @param obj object from which the represented field's value is
+ * to be extracted
+ * @return the value of the represented field in object
+ * obj; primitive values are wrapped in an appropriate
+ * object before being returned
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof).
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ */
+ public Object get(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).get(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance boolean field.
+ *
+ * @param obj the object to extract the boolean value
+ * from
+ * @return the value of the boolean field
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type boolean by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public boolean getBoolean(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getBoolean(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance byte field.
+ *
+ * @param obj the object to extract the byte value
+ * from
+ * @return the value of the byte field
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type byte by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public byte getByte(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getByte(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * char or of another primitive type convertible to
+ * type char via a widening conversion.
+ *
+ * @param obj the object to extract the char value
+ * from
+ * @return the value of the field converted to type char
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type char by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public char getChar(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getChar(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * short or of another primitive type convertible to
+ * type short via a widening conversion.
+ *
+ * @param obj the object to extract the short value
+ * from
+ * @return the value of the field converted to type short
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type short by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public short getShort(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getShort(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * int or of another primitive type convertible to
+ * type int via a widening conversion.
+ *
+ * @param obj the object to extract the int value
+ * from
+ * @return the value of the field converted to type int
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type int by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public int getInt(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getInt(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * long or of another primitive type convertible to
+ * type long via a widening conversion.
+ *
+ * @param obj the object to extract the long value
+ * from
+ * @return the value of the field converted to type long
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type long by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public long getLong(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getLong(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * float or of another primitive type convertible to
+ * type float via a widening conversion.
+ *
+ * @param obj the object to extract the float value
+ * from
+ * @return the value of the field converted to type float
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type float by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public float getFloat(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getFloat(obj);
+ }
+
+ /**
+ * Gets the value of a static or instance field of type
+ * double or of another primitive type convertible to
+ * type double via a widening conversion.
+ *
+ * @param obj the object to extract the double value
+ * from
+ * @return the value of the field converted to type double
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not
+ * an instance of the class or interface declaring the
+ * underlying field (or a subclass or implementor
+ * thereof), or if the field value cannot be
+ * converted to the type double by a
+ * widening conversion.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#get
+ */
+ public double getDouble(Object obj)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ return getFieldAccessor(obj).getDouble(obj);
+ }
+
+ /**
+ * Sets the field represented by this Field object on the
+ * specified object argument to the specified new value. The new
+ * value is automatically unwrapped if the underlying field has a
+ * primitive type.
+ *
+ * obj argument is
+ * ignored; it may be null.
+ *
+ * NullPointerException. If the specified object argument is not
+ * an instance of the class or interface declaring the underlying
+ * field, the method throws an IllegalArgumentException.
+ *
+ * Field object enforces Java language access control, and
+ * the underlying field is inaccessible, the method throws an
+ * IllegalAccessException.
+ *
+ * IllegalAccessException unless
+ * setAccessible(true) has succeeded for this field
+ * and this field is non-static. Setting a final field in this way
+ * is meaningful only during deserialization or reconstruction of
+ * instances of classes with blank final fields, before they are
+ * made available for access by other parts of a program. Use in
+ * any other context may have unpredictable effects, including cases
+ * in which other parts of a program continue to use the original
+ * value of this field.
+ *
+ * IllegalArgumentException.
+ *
+ * IllegalArgumentException.
+ *
+ * obj,
+ * the field's value is set according to the preceding rules.
+ *
+ * @param obj the object whose field should be modified
+ * @param value the new value for the field of obj
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ */
+ public void set(Object obj, Object value)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).set(obj, value);
+ }
+
+ /**
+ * Sets the value of a field as a boolean on the specified object.
+ * This method is equivalent to
+ * set(obj, zObj),
+ * where zObj is a Boolean object and
+ * zObj.booleanValue() == z.
+ *
+ * @param obj the object whose field should be modified
+ * @param z the new value for the field of obj
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setBoolean(Object obj, boolean z)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setBoolean(obj, z);
+ }
+
+ /**
+ * Sets the value of a field as a byte on the specified object.
+ * This method is equivalent to
+ * set(obj, bObj),
+ * where bObj is a Byte object and
+ * bObj.byteValue() == b.
+ *
+ * @param obj the object whose field should be modified
+ * @param b the new value for the field of obj
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setByte(Object obj, byte b)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setByte(obj, b);
+ }
+
+ /**
+ * Sets the value of a field as a char on the specified object.
+ * This method is equivalent to
+ * set(obj, cObj),
+ * where cObj is a Character object and
+ * cObj.charValue() == c.
+ *
+ * @param obj the object whose field should be modified
+ * @param c the new value for the field of obj
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setChar(Object obj, char c)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setChar(obj, c);
+ }
+
+ /**
+ * Sets the value of a field as a short on the specified object.
+ * This method is equivalent to
+ * set(obj, sObj),
+ * where sObj is a Short object and
+ * sObj.shortValue() == s.
+ *
+ * @param obj the object whose field should be modified
+ * @param s the new value for the field of obj
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setShort(Object obj, short s)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setShort(obj, s);
+ }
+
+ /**
+ * Sets the value of a field as an int on the specified object.
+ * This method is equivalent to
+ * set(obj, iObj),
+ * where iObj is a Integer object and
+ * iObj.intValue() == i.
+ *
+ * @param obj the object whose field should be modified
+ * @param i the new value for the field of obj
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setInt(Object obj, int i)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setInt(obj, i);
+ }
+
+ /**
+ * Sets the value of a field as a long on the specified object.
+ * This method is equivalent to
+ * set(obj, lObj),
+ * where lObj is a Long object and
+ * lObj.longValue() == l.
+ *
+ * @param obj the object whose field should be modified
+ * @param l the new value for the field of obj
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setLong(Object obj, long l)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setLong(obj, l);
+ }
+
+ /**
+ * Sets the value of a field as a float on the specified object.
+ * This method is equivalent to
+ * set(obj, fObj),
+ * where fObj is a Float object and
+ * fObj.floatValue() == f.
+ *
+ * @param obj the object whose field should be modified
+ * @param f the new value for the field of obj
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setFloat(Object obj, float f)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setFloat(obj, f);
+ }
+
+ /**
+ * Sets the value of a field as a double on the specified object.
+ * This method is equivalent to
+ * set(obj, dObj),
+ * where dObj is a Double object and
+ * dObj.doubleValue() == d.
+ *
+ * @param obj the object whose field should be modified
+ * @param d the new value for the field of obj
+ * being modified
+ *
+ * @exception IllegalAccessException if the underlying field
+ * is inaccessible.
+ * @exception IllegalArgumentException if the specified object is not an
+ * instance of the class or interface declaring the underlying
+ * field (or a subclass or implementor thereof),
+ * or if an unwrapping conversion fails.
+ * @exception NullPointerException if the specified object is null
+ * and the field is an instance field.
+ * @exception ExceptionInInitializerError if the initialization provoked
+ * by this method fails.
+ * @see Field#set
+ */
+ public void setDouble(Object obj, double d)
+ throws IllegalArgumentException, IllegalAccessException
+ {
+ getFieldAccessor(obj).setDouble(obj, d);
+ }
+
+ // Convenience routine which performs security checks
+ private FieldAccessor getFieldAccessor(Object obj)
+ throws IllegalAccessException
+ {
+ doSecurityCheck(obj);
+ boolean ov = override;
+ FieldAccessor a = (ov)? overrideFieldAccessor : fieldAccessor;
+ return (a != null)? a : acquireFieldAccessor(ov);
+ }
+
+ // NOTE that there is no synchronization used here. It is correct
+ // (though not efficient) to generate more than one FieldAccessor
+ // for a given Field. However, avoiding synchronization will
+ // probably make the implementation more scalable.
+ private FieldAccessor acquireFieldAccessor(boolean overrideFinalCheck) {
+ // First check to see if one has been created yet, and take it
+ // if so
+ FieldAccessor tmp = null;
+ if (root != null) tmp = root.getFieldAccessor(overrideFinalCheck);
+ if (tmp != null) {
+ if (overrideFinalCheck)
+ overrideFieldAccessor = tmp;
+ else
+ fieldAccessor = tmp;
+ } else {
+ // Otherwise fabricate one and propagate it up to the root
+ tmp = reflectionFactory.newFieldAccessor(this, overrideFinalCheck);
+ setFieldAccessor(tmp, overrideFinalCheck);
+ }
+ return tmp;
+ }
+
+ // Returns FieldAccessor for this Field object, not looking up
+ // the chain to the root
+ private FieldAccessor getFieldAccessor(boolean overrideFinalCheck) {
+ return (overrideFinalCheck)? overrideFieldAccessor : fieldAccessor;
+ }
+
+ // Sets the FieldAccessor for this Field object and
+ // (recursively) its root
+ private void setFieldAccessor(FieldAccessor accessor, boolean overrideFinalCheck) {
+ if (overrideFinalCheck)
+ overrideFieldAccessor = accessor;
+ else
+ fieldAccessor = accessor;
+ // Propagate up
+ if (root != null) {
+ root.setFieldAccessor(accessor, overrideFinalCheck);
+ }
+ }
+
+ // NOTE: be very careful if you change the stack depth of this
+ // routine. The depth of the "getCallerClass" call is hardwired so
+ // that the compiler can have an easier time if this gets inlined.
+ private void doSecurityCheck(Object obj) throws IllegalAccessException {
+ if (!override) {
+ if (!Reflection.quickCheckMemberAccess(clazz, modifiers)) {
+ Class caller = Reflection.getCallerClass(4);
+ Class targetClass = ((obj == null || !Modifier.isProtected(modifiers))
+ ? clazz
+ : obj.getClass());
+
+ synchronized (this) {
+ if ((securityCheckCache == caller)
+ && (securityCheckTargetClassCache == targetClass)) {
+ return;
+ }
+ }
+ Reflection.ensureMemberAccess(caller, clazz, obj, modifiers);
+ synchronized (this) {
+ securityCheckCache = caller;
+ securityCheckTargetClassCache = targetClass;
+ }
+ }
+ }
+ }
+
+ /*
+ * Utility routine to paper over array type names
+ */
+ static String getTypeName(Class type) {
+ if (type.isArray()) {
+ try {
+ Class cl = type;
+ int dimensions = 0;
+ while (cl.isArray()) {
+ dimensions++;
+ cl = cl.getComponentType();
+ }
+ StringBuffer sb = new StringBuffer();
+ sb.append(cl.getName());
+ for (int i = 0; i < dimensions; i++) {
+ sb.append("[]");
+ }
+ return sb.toString();
+ } catch (Throwable e) { /*FALLTHRU*/ }
+ }
+ return type.getName();
+ }
+
+ /**
+ * @throws NullPointerException {@inheritDoc}
+ * @since 1.5
+ */
+ public