зеркало из https://github.com/mozilla/gecko-dev.git
Make JavaAdapter work on mozilla-only.
This commit is contained in:
norris%netscape.com
Родитель
fa3b54b8e5
Коммит
e07d8c6b14
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Загрузить разницу
Разница между файлами не показана из-за своего большого размера
Загрузить разницу
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@ -474,7 +474,8 @@ public final class Context {
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"NativeNumber", "NativeDate",
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"NativeMath", "NativeCall",
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"NativeClosure", "NativeWith",
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"regexp.NativeRegExp", "NativeScript"
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"regexp.NativeRegExp", "NativeScript",
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"JavaAdapter"
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};
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for (int i=0; i < classes.length; i++) {
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try {
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@ -488,9 +489,6 @@ public final class Context {
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// This creates the Packages and java package roots.
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NativeJavaPackage.init(scope);
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// Define JavaAdapter class if possible.
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getCompiler().defineJavaAdapter(scope);
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}
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// All of these exceptions should not occur since we are initializing
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// from known classes
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@ -53,19 +53,7 @@ public class Interpreter extends LabelTable {
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}
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return generateScriptICode(cx, scope, tree, securityDomain);
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}
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public void defineJavaAdapter(Scriptable scope) {
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// do nothing; only the code generator can define the JavaAdapter
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try {
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String adapterName = System.getProperty("org.mozilla.javascript.JavaAdapter");
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if (adapterName != null) {
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Class adapterClass = Class.forName(adapterName);
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ScriptableObject.defineClass(scope, adapterClass);
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}
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} catch (Exception e) {
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}
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}
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private void generateICodeFromTree(Node tree,
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VariableTable varTable,
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boolean needsActivation,
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@ -0,0 +1,492 @@
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/* -*- Mode: java; tab-width: 8 -*-
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* Copyright © 1997, 1998 Netscape Communications Corporation,
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* All Rights Reserved.
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*/
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package org.mozilla.javascript;
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import org.mozilla.classfile.*;
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import java.lang.reflect.*;
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import java.io.*;
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import java.util.*;
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public class JavaAdapter extends ScriptableObject {
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public String getClassName() {
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return "JavaAdapter";
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}
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public static Object js_JavaAdapter(Context cx, Object[] args,
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Function ctorObj, boolean inNewExpr)
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throws InstantiationException, NoSuchMethodException,
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IllegalAccessException, InvocationTargetException,
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ClassNotFoundException
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{
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Class superClass = Object.class;
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Class[] intfs = new Class[args.length-1];
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int interfaceCount = 0;
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for (int i=0; i < args.length-1; i++) {
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if (!(args[i] instanceof NativeJavaClass)) {
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// TODO: report error
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throw new RuntimeException("expected java class object");
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}
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Class c = ((NativeJavaClass) args[i]).getClassObject();
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if (!c.isInterface()) {
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superClass = c;
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break;
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}
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intfs[interfaceCount++] = c;
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}
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StringBuffer sb = new StringBuffer("adapter");
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sb.append(serial++);
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String genName = sb.toString();
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ClassFileWriter cfw = new ClassFileWriter(genName,
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superClass.getName(),
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"<adapter>");
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cfw.addField("o", "Lorg/mozilla/javascript/FlattenedObject;",
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ClassFileWriter.ACC_PRIVATE);
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cfw.addField("self", "Lorg/mozilla/javascript/Scriptable;",
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(short) (ClassFileWriter.ACC_PUBLIC | ClassFileWriter.ACC_FINAL));
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for (int i = 0; i < interfaceCount; i++) {
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if (intfs[i] != null)
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cfw.addInterface(intfs[i].getName());
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}
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generateCtor(cfw, genName, superClass);
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Hashtable generatedOverrides = new Hashtable();
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// if abstract class was specified, then generate appropriate overrides.
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for (int i = 0; i < interfaceCount; i++) {
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Method[] methods = intfs[i].getMethods();
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for (int j = 0; j < methods.length; j++) {
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Method method = methods[j];
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int mods = method.getModifiers();
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if (Modifier.isStatic(mods) || Modifier.isFinal(mods))
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continue;
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// make sure to generate only one instance of a particular
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// method/signature.
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String methodKey = getMethodSignature(method);
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if (! generatedOverrides.containsKey(methodKey)) {
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generateOverride(cfw, genName, method);
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generatedOverrides.put(methodKey, methodKey);
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}
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}
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}
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// Now, go through the superclasses methods, checking for abstract methods
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// or additional methods to override.
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FlattenedObject obj = new FlattenedObject(
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(Scriptable) args[args.length - 1]);
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// generate any additional overrides that the object might contain.
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Method[] methods = superClass.getMethods();
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for (int j = 0; j < methods.length; j++) {
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Method method = methods[j];
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int mods = method.getModifiers();
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if (Modifier.isStatic(mods) || Modifier.isFinal(mods))
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continue;
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// if a method is marked abstract, must implement it or the
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// resulting class won't be instantiable. otherwise, if the object
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// has a property of the same name, then an override is intended.
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if (Modifier.isAbstract(mods) || obj.hasProperty(method.getName())) {
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// make sure to generate only one instance of a particular
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// method/signature.
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String methodKey = getMethodSignature(method);
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if (! generatedOverrides.containsKey(methodKey)) {
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generateOverride(cfw, genName, method);
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generatedOverrides.put(methodKey, method);
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}
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}
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}
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// TODO: generate Java methods, fields for remaining properties that
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// are not overrides? Probably not necessary to generate methods
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// that aren't overrides.
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ByteArrayOutputStream out = new ByteArrayOutputStream(512);
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try {
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cfw.write(out);
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}
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catch (IOException ioe) {
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throw new RuntimeException("unexpected IOException");
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}
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byte[] bytes = out.toByteArray();
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classLoader.defineClass(genName, bytes);
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Class c = classLoader.loadClass(genName, true);
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Class[] ctorParms = { FlattenedObject.class };
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Object[] ctorArgs = { obj };
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Object v = c.getConstructor(ctorParms).newInstance(ctorArgs);
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return cx.toObject(v, ScriptableObject.getTopLevelScope(ctorObj));
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}
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/**
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* Utility method, which dynamically binds a Context to the current thread,
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* if none already exists.
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*/
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public static Object callMethod(FlattenedObject object, Object methodId,
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Object[] args)
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{
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try {
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// old way, bind a Context dynamically, unbind if it wasn't there before.
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Context cx = Context.getCurrentContext();
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if (cx == null) {
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cx = new Context();
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cx.enter();
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try {
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return (object.hasProperty(methodId)
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? object.callMethod(methodId, args)
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: Context.getUndefinedValue());
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} finally {
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cx.exit();
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}
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} else {
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return (object.hasProperty(methodId)
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? object.callMethod(methodId, args)
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: Context.getUndefinedValue());
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}
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} catch (Exception ex) {
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ex.printStackTrace(System.err);
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throw new Error(ex.getMessage());
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}
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}
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private static void generateCtor(ClassFileWriter cfw, String genName,
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Class superClass)
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{
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cfw.startMethod("<init>",
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"(Lorg/mozilla/javascript/FlattenedObject;)V",
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ClassFileWriter.ACC_PUBLIC);
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// Invoke base class constructor
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cfw.add(ByteCode.ALOAD_0); // this
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cfw.add(ByteCode.INVOKESPECIAL,
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superClass.getName().replace('.', '/'),
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"<init>", "()", "V");
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// save parameter in instance variable
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cfw.add(ByteCode.ALOAD_0); // this
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cfw.add(ByteCode.ALOAD_1); // first arg
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cfw.add(ByteCode.PUTFIELD, genName, "o",
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"Lorg/mozilla/javascript/FlattenedObject;");
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// store Scriptable object in "self" a public instance variable, so scripts can read it.
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cfw.add(ByteCode.ALOAD_0); // this
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cfw.add(ByteCode.ALOAD_1); // first arg
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cfw.add(ByteCode.INVOKEVIRTUAL,
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"org/mozilla/javascript/FlattenedObject",
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"getObject", "()",
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"Lorg/mozilla/javascript/Scriptable;");
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cfw.add(ByteCode.PUTFIELD, genName, "self",
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"Lorg/mozilla/javascript/Scriptable;");
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cfw.add(ByteCode.RETURN);
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cfw.stopMethod((short)20, null); // TODO: magic number "20"
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}
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/**
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* Generates code to create a java.lang.Boolean, java.lang.Character or a
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* java.lang.Double to wrap the specified primitive parameter. Leaves the
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* wrapper object on the top of the stack.
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*/
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private static int generateWrapParam(ClassFileWriter cfw, int paramOffset,
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Class paramType)
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{
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if (paramType.equals(Boolean.TYPE)) {
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// wrap boolean values with java.lang.Boolean.
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cfw.add(ByteCode.NEW, "java/lang/Boolean");
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cfw.add(ByteCode.DUP);
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cfw.add(ByteCode.ILOAD, paramOffset++);
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cfw.add(ByteCode.INVOKESPECIAL, "java/lang/Boolean",
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"<init>", "(Z)", "V");
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} else
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if (paramType.equals(Character.TYPE)) {
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// Create a string of length 1 using the character parameter.
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cfw.add(ByteCode.NEW, "java/lang/String");
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cfw.add(ByteCode.DUP);
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cfw.add(ByteCode.ICONST_1);
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cfw.add(ByteCode.NEWARRAY, ByteCode.T_CHAR);
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cfw.add(ByteCode.DUP);
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cfw.add(ByteCode.ICONST_0);
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cfw.add(ByteCode.ILOAD, paramOffset++);
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cfw.add(ByteCode.CASTORE);
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cfw.add(ByteCode.INVOKESPECIAL, "java/lang/String",
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"<init>", "([C)", "V");
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} else {
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// convert all numeric values to java.lang.Double.
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cfw.add(ByteCode.NEW, "java/lang/Double");
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cfw.add(ByteCode.DUP);
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String typeName = paramType.getName();
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switch (typeName.charAt(0)) {
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case 'b':
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case 's':
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case 'i':
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// load an int value, convert to double.
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cfw.add(ByteCode.ILOAD, paramOffset++);
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cfw.add(ByteCode.I2D);
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break;
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case 'l':
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// load a long, convert to double.
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cfw.add(ByteCode.LLOAD, paramOffset);
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cfw.add(ByteCode.L2D);
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paramOffset += 2;
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break;
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case 'f':
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// load a float, convert to double.
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cfw.add(ByteCode.FLOAD, paramOffset++);
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cfw.add(ByteCode.F2D);
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break;
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case 'd':
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cfw.add(ByteCode.DLOAD, paramOffset);
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paramOffset += 2;
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break;
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}
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cfw.add(ByteCode.INVOKESPECIAL, "java/lang/Double",
|
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"<init>", "(D)", "V");
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}
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return paramOffset;
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}
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/**
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* Generates code to convert a wrapped value type to a primitive type.
|
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* Handles unwrapping java.lang.Boolean, and java.lang.Number types.
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||||
* May need to map between char and java.lang.String as well.
|
||||
* Generates the appropriate RETURN bytecode.
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||||
*/
|
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private static void generateReturnResult(ClassFileWriter cfw,
|
||||
Class retType)
|
||||
{
|
||||
// wrap boolean values with java.lang.Boolean, convert all other
|
||||
// primitive values to java.lang.Double.
|
||||
if (retType.equals(Boolean.TYPE)) {
|
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cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toBoolean", "(Ljava/lang/Object;)",
|
||||
"Z");
|
||||
cfw.add(ByteCode.IRETURN);
|
||||
} else if (retType.equals(Character.TYPE)) {
|
||||
// characters are represented as strings in JavaScript.
|
||||
// return the first character.
|
||||
// first convert the value to a string if possible.
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toString", "(Ljava/lang/Object;)",
|
||||
"Ljava/lang/String;");
|
||||
cfw.add(ByteCode.ICONST_0);
|
||||
cfw.add(ByteCode.INVOKEVIRTUAL, "java/lang/String", "charAt",
|
||||
"(I)", "C");
|
||||
cfw.add(ByteCode.IRETURN);
|
||||
} else if (retType.isPrimitive()) {
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toNumber", "(Ljava/lang/Object;)",
|
||||
"D");
|
||||
String typeName = retType.getName();
|
||||
switch (typeName.charAt(0)) {
|
||||
case 'b':
|
||||
case 's':
|
||||
case 'i':
|
||||
cfw.add(ByteCode.D2I);
|
||||
cfw.add(ByteCode.IRETURN);
|
||||
break;
|
||||
case 'l':
|
||||
cfw.add(ByteCode.D2L);
|
||||
cfw.add(ByteCode.LRETURN);
|
||||
break;
|
||||
case 'f':
|
||||
cfw.add(ByteCode.D2F);
|
||||
cfw.add(ByteCode.FRETURN);
|
||||
break;
|
||||
case 'd':
|
||||
cfw.add(ByteCode.DRETURN);
|
||||
break;
|
||||
default:
|
||||
throw new RuntimeException("Unexpected return type " +
|
||||
retType.toString());
|
||||
}
|
||||
} else if (retType.equals(String.class)) {
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toString", "(Ljava/lang/Object;)",
|
||||
"Ljava/lang/String;");
|
||||
cfw.add(ByteCode.ARETURN);
|
||||
} else if (retType.equals(Scriptable.class)) {
|
||||
cfw.add(ByteCode.ALOAD_0); // load 'this' to find scope from
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toObject",
|
||||
"(Ljava/lang/Object;" +
|
||||
"Lorg/mozilla/javascript/Scriptable;)",
|
||||
"Lorg/mozilla/javascript/Scriptable;");
|
||||
cfw.add(ByteCode.ARETURN);
|
||||
} else {
|
||||
// If it is a wrapped type, cast to Wrapper and call unwrap()
|
||||
cfw.add(ByteCode.DUP);
|
||||
cfw.add(ByteCode.INSTANCEOF, "org/mozilla/javascript/Wrapper");
|
||||
// skip 3 for IFEQ, 3 for CHECKCAST, and 3 for INVOKEVIRTUAL
|
||||
cfw.add(ByteCode.IFEQ, 9);
|
||||
cfw.add(ByteCode.CHECKCAST, "org/mozilla/javascript/Wrapper");
|
||||
cfw.add(ByteCode.INVOKEVIRTUAL,
|
||||
"org/mozilla/javascript/Wrapper",
|
||||
"unwrap", "()", "Ljava/lang/Object;");
|
||||
// Now cast to return type
|
||||
String retTypeStr = retType.getName().replace('.', '/');
|
||||
cfw.add(ByteCode.CHECKCAST, retTypeStr);
|
||||
cfw.add(ByteCode.ARETURN);
|
||||
}
|
||||
}
|
||||
|
||||
private static void generateOverride(ClassFileWriter cfw, String genName,
|
||||
Method m)
|
||||
{
|
||||
Class[] parms = m.getParameterTypes();
|
||||
StringBuffer sb = new StringBuffer();
|
||||
sb.append('(');
|
||||
short arrayLocal = 1; // includes this.
|
||||
for (int i = 0; i < parms.length; i++) {
|
||||
Class type = parms[i];
|
||||
appendTypeString(sb, type);
|
||||
if (type.equals(Long.TYPE) || type.equals(Double.TYPE))
|
||||
arrayLocal += 2;
|
||||
else
|
||||
arrayLocal += 1;
|
||||
}
|
||||
sb.append(')');
|
||||
appendTypeString(sb, m.getReturnType());
|
||||
String methodSignature = sb.toString();
|
||||
// System.out.println("generating " + m.getName() + methodSignature);
|
||||
// System.out.flush();
|
||||
cfw.startMethod(m.getName(), methodSignature,
|
||||
ClassFileWriter.ACC_PUBLIC);
|
||||
cfw.add(ByteCode.BIPUSH, (byte) parms.length); // > 255 parms?
|
||||
cfw.add(ByteCode.ANEWARRAY, "java/lang/Object");
|
||||
cfw.add(ByteCode.ASTORE, arrayLocal);
|
||||
|
||||
// allocate a local variable to store the scope used to wrap native objects.
|
||||
short scopeLocal = (short) (arrayLocal + 1);
|
||||
boolean loadedScope = false;
|
||||
|
||||
int paramOffset = 1;
|
||||
for (int i = 0; i < parms.length; i++) {
|
||||
cfw.add(ByteCode.ALOAD, arrayLocal);
|
||||
cfw.add(ByteCode.BIPUSH, i);
|
||||
if (parms[i].isPrimitive()) {
|
||||
paramOffset = generateWrapParam(cfw, paramOffset, parms[i]);
|
||||
} else {
|
||||
// An arbitary Java object; call Context.toObject to wrap in
|
||||
// a Scriptable object
|
||||
cfw.add(ByteCode.ALOAD, paramOffset++);
|
||||
if (! loadedScope) {
|
||||
// load this.self into a local the first time it's needed.
|
||||
// it will provide the scope needed by Context.toObject().
|
||||
cfw.add(ByteCode.ALOAD_0);
|
||||
cfw.add(ByteCode.GETFIELD, genName, "self",
|
||||
"Lorg/mozilla/javascript/Scriptable;");
|
||||
cfw.add(ByteCode.ASTORE, scopeLocal);
|
||||
loadedScope = true;
|
||||
}
|
||||
cfw.add(ByteCode.ALOAD, scopeLocal);
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toObject",
|
||||
"(Ljava/lang/Object;" +
|
||||
"Lorg/mozilla/javascript/Scriptable;)",
|
||||
"Lorg/mozilla/javascript/Scriptable;");
|
||||
}
|
||||
cfw.add(ByteCode.AASTORE);
|
||||
}
|
||||
|
||||
cfw.add(ByteCode.ALOAD_0); // this
|
||||
cfw.add(ByteCode.GETFIELD, genName, "o",
|
||||
"Lorg/mozilla/javascript/FlattenedObject;");
|
||||
|
||||
cfw.addLoadConstant(m.getName());
|
||||
cfw.add(ByteCode.ALOAD, arrayLocal);
|
||||
|
||||
// go through utility method, which creates a Context to run the
|
||||
// method in.
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/JavaAdapter",
|
||||
"callMethod",
|
||||
"(Lorg/mozilla/javascript/FlattenedObject;" +
|
||||
"Ljava/lang/Object;[Ljava/lang/Object;)",
|
||||
"Ljava/lang/Object;");
|
||||
|
||||
Class retType = m.getReturnType();
|
||||
if (retType.equals(Void.TYPE)) {
|
||||
cfw.add(ByteCode.POP);
|
||||
cfw.add(ByteCode.RETURN);
|
||||
} else {
|
||||
generateReturnResult(cfw, retType);
|
||||
}
|
||||
cfw.stopMethod((short)(scopeLocal + 1), null);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a fully qualified method name concatenated with its signature.
|
||||
*/
|
||||
private static String getMethodSignature(Method method) {
|
||||
Class[] parms = method.getParameterTypes();
|
||||
StringBuffer sb = new StringBuffer();
|
||||
sb.append(method.getName());
|
||||
sb.append('(');
|
||||
for (int i = 0; i < parms.length; i++) {
|
||||
Class type = parms[i];
|
||||
appendTypeString(sb, type);
|
||||
}
|
||||
sb.append(')');
|
||||
appendTypeString(sb, method.getReturnType());
|
||||
return sb.toString();
|
||||
}
|
||||
|
||||
private static StringBuffer appendTypeString(StringBuffer sb, Class type)
|
||||
{
|
||||
while (type.isArray()) {
|
||||
sb.append('[');
|
||||
type = type.getComponentType();
|
||||
}
|
||||
if (type.isPrimitive()) {
|
||||
if (type.equals(Boolean.TYPE)) {
|
||||
sb.append('Z');
|
||||
} else
|
||||
if (type.equals(Long.TYPE)) {
|
||||
sb.append('J');
|
||||
} else {
|
||||
String typeName = type.getName();
|
||||
sb.append(Character.toUpperCase(typeName.charAt(0)));
|
||||
}
|
||||
} else {
|
||||
sb.append('L');
|
||||
sb.append(type.getName().replace('.', '/'));
|
||||
sb.append(';');
|
||||
}
|
||||
return sb;
|
||||
}
|
||||
|
||||
static final class MyClassLoader extends ClassLoader {
|
||||
public Class defineClass(String name, byte data[]) {
|
||||
return super.defineClass(name, data, 0, data.length);
|
||||
}
|
||||
|
||||
protected Class loadClass(String name, boolean resolve)
|
||||
throws ClassNotFoundException
|
||||
{
|
||||
Class clazz = findLoadedClass(name);
|
||||
if (clazz == null) {
|
||||
ClassLoader loader = getClass().getClassLoader();
|
||||
if (loader != null)
|
||||
return loader.loadClass(name);
|
||||
clazz = findSystemClass(name);
|
||||
}
|
||||
if (resolve)
|
||||
resolveClass(clazz);
|
||||
return clazz;
|
||||
}
|
||||
|
||||
private java.util.Hashtable loaded;
|
||||
}
|
||||
|
||||
private static int serial;
|
||||
private static MyClassLoader classLoader = new MyClassLoader();
|
||||
}
|
||||
|
|
@ -33,6 +33,28 @@ public class LocalVariable {
|
|||
|
||||
public String getName() { return itsName; }
|
||||
|
||||
/**
|
||||
* Return the starting PC where this variable is live, or -1
|
||||
* if it is not a Java register.
|
||||
*/
|
||||
public int getStartPC() {
|
||||
return -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the Java register number or -1 if it is not a Java register.
|
||||
*/
|
||||
public short getJRegister() {
|
||||
return -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true if the local variable is a Java register with double type.
|
||||
*/
|
||||
public boolean isNumber() {
|
||||
return false;
|
||||
}
|
||||
|
||||
private String itsName;
|
||||
private int itsIndex = -1;
|
||||
|
||||
|
|
|
|||
|
|
@ -112,7 +112,7 @@ public class VariableTable {
|
|||
itsVariables.addElement(lVar);
|
||||
itsVariableNames.put(vName, new Integer(index));
|
||||
}
|
||||
|
||||
|
||||
// a list of the formal parameters and local variables
|
||||
protected Vector itsVariables = new Vector();
|
||||
|
||||
|
|
|
|||
Разница между файлами не показана из-за своего большого размера
Загрузить разницу
Разница между файлами не показана из-за своего большого размера
Загрузить разницу
|
|
@ -474,7 +474,8 @@ public final class Context {
|
|||
"NativeNumber", "NativeDate",
|
||||
"NativeMath", "NativeCall",
|
||||
"NativeClosure", "NativeWith",
|
||||
"regexp.NativeRegExp", "NativeScript"
|
||||
"regexp.NativeRegExp", "NativeScript",
|
||||
"JavaAdapter"
|
||||
};
|
||||
for (int i=0; i < classes.length; i++) {
|
||||
try {
|
||||
|
|
@ -488,9 +489,6 @@ public final class Context {
|
|||
|
||||
// This creates the Packages and java package roots.
|
||||
NativeJavaPackage.init(scope);
|
||||
|
||||
// Define JavaAdapter class if possible.
|
||||
getCompiler().defineJavaAdapter(scope);
|
||||
}
|
||||
// All of these exceptions should not occur since we are initializing
|
||||
// from known classes
|
||||
|
|
|
|||
|
|
@ -53,19 +53,7 @@ public class Interpreter extends LabelTable {
|
|||
}
|
||||
return generateScriptICode(cx, scope, tree, securityDomain);
|
||||
}
|
||||
|
||||
public void defineJavaAdapter(Scriptable scope) {
|
||||
// do nothing; only the code generator can define the JavaAdapter
|
||||
try {
|
||||
String adapterName = System.getProperty("org.mozilla.javascript.JavaAdapter");
|
||||
if (adapterName != null) {
|
||||
Class adapterClass = Class.forName(adapterName);
|
||||
ScriptableObject.defineClass(scope, adapterClass);
|
||||
}
|
||||
} catch (Exception e) {
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
private void generateICodeFromTree(Node tree,
|
||||
VariableTable varTable,
|
||||
boolean needsActivation,
|
||||
|
|
|
|||
|
|
@ -0,0 +1,492 @@
|
|||
/* -*- Mode: java; tab-width: 8 -*-
|
||||
* Copyright © 1997, 1998 Netscape Communications Corporation,
|
||||
* All Rights Reserved.
|
||||
*/
|
||||
|
||||
package org.mozilla.javascript;
|
||||
|
||||
import org.mozilla.classfile.*;
|
||||
import java.lang.reflect.*;
|
||||
import java.io.*;
|
||||
import java.util.*;
|
||||
|
||||
public class JavaAdapter extends ScriptableObject {
|
||||
|
||||
public String getClassName() {
|
||||
return "JavaAdapter";
|
||||
}
|
||||
|
||||
public static Object js_JavaAdapter(Context cx, Object[] args,
|
||||
Function ctorObj, boolean inNewExpr)
|
||||
throws InstantiationException, NoSuchMethodException,
|
||||
IllegalAccessException, InvocationTargetException,
|
||||
ClassNotFoundException
|
||||
{
|
||||
Class superClass = Object.class;
|
||||
Class[] intfs = new Class[args.length-1];
|
||||
int interfaceCount = 0;
|
||||
for (int i=0; i < args.length-1; i++) {
|
||||
if (!(args[i] instanceof NativeJavaClass)) {
|
||||
// TODO: report error
|
||||
throw new RuntimeException("expected java class object");
|
||||
}
|
||||
Class c = ((NativeJavaClass) args[i]).getClassObject();
|
||||
if (!c.isInterface()) {
|
||||
superClass = c;
|
||||
break;
|
||||
}
|
||||
intfs[interfaceCount++] = c;
|
||||
}
|
||||
|
||||
StringBuffer sb = new StringBuffer("adapter");
|
||||
sb.append(serial++);
|
||||
String genName = sb.toString();
|
||||
ClassFileWriter cfw = new ClassFileWriter(genName,
|
||||
superClass.getName(),
|
||||
"<adapter>");
|
||||
cfw.addField("o", "Lorg/mozilla/javascript/FlattenedObject;",
|
||||
ClassFileWriter.ACC_PRIVATE);
|
||||
cfw.addField("self", "Lorg/mozilla/javascript/Scriptable;",
|
||||
(short) (ClassFileWriter.ACC_PUBLIC | ClassFileWriter.ACC_FINAL));
|
||||
for (int i = 0; i < interfaceCount; i++) {
|
||||
if (intfs[i] != null)
|
||||
cfw.addInterface(intfs[i].getName());
|
||||
}
|
||||
|
||||
generateCtor(cfw, genName, superClass);
|
||||
|
||||
Hashtable generatedOverrides = new Hashtable();
|
||||
|
||||
// if abstract class was specified, then generate appropriate overrides.
|
||||
for (int i = 0; i < interfaceCount; i++) {
|
||||
Method[] methods = intfs[i].getMethods();
|
||||
for (int j = 0; j < methods.length; j++) {
|
||||
Method method = methods[j];
|
||||
int mods = method.getModifiers();
|
||||
if (Modifier.isStatic(mods) || Modifier.isFinal(mods))
|
||||
continue;
|
||||
// make sure to generate only one instance of a particular
|
||||
// method/signature.
|
||||
String methodKey = getMethodSignature(method);
|
||||
if (! generatedOverrides.containsKey(methodKey)) {
|
||||
generateOverride(cfw, genName, method);
|
||||
generatedOverrides.put(methodKey, methodKey);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Now, go through the superclasses methods, checking for abstract methods
|
||||
// or additional methods to override.
|
||||
FlattenedObject obj = new FlattenedObject(
|
||||
(Scriptable) args[args.length - 1]);
|
||||
|
||||
// generate any additional overrides that the object might contain.
|
||||
Method[] methods = superClass.getMethods();
|
||||
for (int j = 0; j < methods.length; j++) {
|
||||
Method method = methods[j];
|
||||
int mods = method.getModifiers();
|
||||
if (Modifier.isStatic(mods) || Modifier.isFinal(mods))
|
||||
continue;
|
||||
// if a method is marked abstract, must implement it or the
|
||||
// resulting class won't be instantiable. otherwise, if the object
|
||||
// has a property of the same name, then an override is intended.
|
||||
if (Modifier.isAbstract(mods) || obj.hasProperty(method.getName())) {
|
||||
// make sure to generate only one instance of a particular
|
||||
// method/signature.
|
||||
String methodKey = getMethodSignature(method);
|
||||
if (! generatedOverrides.containsKey(methodKey)) {
|
||||
generateOverride(cfw, genName, method);
|
||||
generatedOverrides.put(methodKey, method);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// TODO: generate Java methods, fields for remaining properties that
|
||||
// are not overrides? Probably not necessary to generate methods
|
||||
// that aren't overrides.
|
||||
|
||||
ByteArrayOutputStream out = new ByteArrayOutputStream(512);
|
||||
try {
|
||||
cfw.write(out);
|
||||
}
|
||||
catch (IOException ioe) {
|
||||
throw new RuntimeException("unexpected IOException");
|
||||
}
|
||||
byte[] bytes = out.toByteArray();
|
||||
classLoader.defineClass(genName, bytes);
|
||||
Class c = classLoader.loadClass(genName, true);
|
||||
Class[] ctorParms = { FlattenedObject.class };
|
||||
Object[] ctorArgs = { obj };
|
||||
Object v = c.getConstructor(ctorParms).newInstance(ctorArgs);
|
||||
return cx.toObject(v, ScriptableObject.getTopLevelScope(ctorObj));
|
||||
}
|
||||
|
||||
/**
|
||||
* Utility method, which dynamically binds a Context to the current thread,
|
||||
* if none already exists.
|
||||
*/
|
||||
public static Object callMethod(FlattenedObject object, Object methodId,
|
||||
Object[] args)
|
||||
{
|
||||
try {
|
||||
// old way, bind a Context dynamically, unbind if it wasn't there before.
|
||||
Context cx = Context.getCurrentContext();
|
||||
if (cx == null) {
|
||||
cx = new Context();
|
||||
cx.enter();
|
||||
try {
|
||||
return (object.hasProperty(methodId)
|
||||
? object.callMethod(methodId, args)
|
||||
: Context.getUndefinedValue());
|
||||
} finally {
|
||||
cx.exit();
|
||||
}
|
||||
} else {
|
||||
return (object.hasProperty(methodId)
|
||||
? object.callMethod(methodId, args)
|
||||
: Context.getUndefinedValue());
|
||||
}
|
||||
} catch (Exception ex) {
|
||||
ex.printStackTrace(System.err);
|
||||
throw new Error(ex.getMessage());
|
||||
}
|
||||
}
|
||||
|
||||
private static void generateCtor(ClassFileWriter cfw, String genName,
|
||||
Class superClass)
|
||||
{
|
||||
cfw.startMethod("<init>",
|
||||
"(Lorg/mozilla/javascript/FlattenedObject;)V",
|
||||
ClassFileWriter.ACC_PUBLIC);
|
||||
|
||||
// Invoke base class constructor
|
||||
cfw.add(ByteCode.ALOAD_0); // this
|
||||
cfw.add(ByteCode.INVOKESPECIAL,
|
||||
superClass.getName().replace('.', '/'),
|
||||
"<init>", "()", "V");
|
||||
|
||||
// save parameter in instance variable
|
||||
cfw.add(ByteCode.ALOAD_0); // this
|
||||
cfw.add(ByteCode.ALOAD_1); // first arg
|
||||
cfw.add(ByteCode.PUTFIELD, genName, "o",
|
||||
"Lorg/mozilla/javascript/FlattenedObject;");
|
||||
|
||||
// store Scriptable object in "self" a public instance variable, so scripts can read it.
|
||||
cfw.add(ByteCode.ALOAD_0); // this
|
||||
cfw.add(ByteCode.ALOAD_1); // first arg
|
||||
cfw.add(ByteCode.INVOKEVIRTUAL,
|
||||
"org/mozilla/javascript/FlattenedObject",
|
||||
"getObject", "()",
|
||||
"Lorg/mozilla/javascript/Scriptable;");
|
||||
cfw.add(ByteCode.PUTFIELD, genName, "self",
|
||||
"Lorg/mozilla/javascript/Scriptable;");
|
||||
|
||||
cfw.add(ByteCode.RETURN);
|
||||
cfw.stopMethod((short)20, null); // TODO: magic number "20"
|
||||
}
|
||||
|
||||
/**
|
||||
* Generates code to create a java.lang.Boolean, java.lang.Character or a
|
||||
* java.lang.Double to wrap the specified primitive parameter. Leaves the
|
||||
* wrapper object on the top of the stack.
|
||||
*/
|
||||
private static int generateWrapParam(ClassFileWriter cfw, int paramOffset,
|
||||
Class paramType)
|
||||
{
|
||||
if (paramType.equals(Boolean.TYPE)) {
|
||||
// wrap boolean values with java.lang.Boolean.
|
||||
cfw.add(ByteCode.NEW, "java/lang/Boolean");
|
||||
cfw.add(ByteCode.DUP);
|
||||
cfw.add(ByteCode.ILOAD, paramOffset++);
|
||||
cfw.add(ByteCode.INVOKESPECIAL, "java/lang/Boolean",
|
||||
"<init>", "(Z)", "V");
|
||||
} else
|
||||
if (paramType.equals(Character.TYPE)) {
|
||||
// Create a string of length 1 using the character parameter.
|
||||
cfw.add(ByteCode.NEW, "java/lang/String");
|
||||
cfw.add(ByteCode.DUP);
|
||||
cfw.add(ByteCode.ICONST_1);
|
||||
cfw.add(ByteCode.NEWARRAY, ByteCode.T_CHAR);
|
||||
cfw.add(ByteCode.DUP);
|
||||
cfw.add(ByteCode.ICONST_0);
|
||||
cfw.add(ByteCode.ILOAD, paramOffset++);
|
||||
cfw.add(ByteCode.CASTORE);
|
||||
cfw.add(ByteCode.INVOKESPECIAL, "java/lang/String",
|
||||
"<init>", "([C)", "V");
|
||||
} else {
|
||||
// convert all numeric values to java.lang.Double.
|
||||
cfw.add(ByteCode.NEW, "java/lang/Double");
|
||||
cfw.add(ByteCode.DUP);
|
||||
String typeName = paramType.getName();
|
||||
switch (typeName.charAt(0)) {
|
||||
case 'b':
|
||||
case 's':
|
||||
case 'i':
|
||||
// load an int value, convert to double.
|
||||
cfw.add(ByteCode.ILOAD, paramOffset++);
|
||||
cfw.add(ByteCode.I2D);
|
||||
break;
|
||||
case 'l':
|
||||
// load a long, convert to double.
|
||||
cfw.add(ByteCode.LLOAD, paramOffset);
|
||||
cfw.add(ByteCode.L2D);
|
||||
paramOffset += 2;
|
||||
break;
|
||||
case 'f':
|
||||
// load a float, convert to double.
|
||||
cfw.add(ByteCode.FLOAD, paramOffset++);
|
||||
cfw.add(ByteCode.F2D);
|
||||
break;
|
||||
case 'd':
|
||||
cfw.add(ByteCode.DLOAD, paramOffset);
|
||||
paramOffset += 2;
|
||||
break;
|
||||
}
|
||||
cfw.add(ByteCode.INVOKESPECIAL, "java/lang/Double",
|
||||
"<init>", "(D)", "V");
|
||||
}
|
||||
return paramOffset;
|
||||
}
|
||||
|
||||
/**
|
||||
* Generates code to convert a wrapped value type to a primitive type.
|
||||
* Handles unwrapping java.lang.Boolean, and java.lang.Number types.
|
||||
* May need to map between char and java.lang.String as well.
|
||||
* Generates the appropriate RETURN bytecode.
|
||||
*/
|
||||
private static void generateReturnResult(ClassFileWriter cfw,
|
||||
Class retType)
|
||||
{
|
||||
// wrap boolean values with java.lang.Boolean, convert all other
|
||||
// primitive values to java.lang.Double.
|
||||
if (retType.equals(Boolean.TYPE)) {
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toBoolean", "(Ljava/lang/Object;)",
|
||||
"Z");
|
||||
cfw.add(ByteCode.IRETURN);
|
||||
} else if (retType.equals(Character.TYPE)) {
|
||||
// characters are represented as strings in JavaScript.
|
||||
// return the first character.
|
||||
// first convert the value to a string if possible.
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toString", "(Ljava/lang/Object;)",
|
||||
"Ljava/lang/String;");
|
||||
cfw.add(ByteCode.ICONST_0);
|
||||
cfw.add(ByteCode.INVOKEVIRTUAL, "java/lang/String", "charAt",
|
||||
"(I)", "C");
|
||||
cfw.add(ByteCode.IRETURN);
|
||||
} else if (retType.isPrimitive()) {
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toNumber", "(Ljava/lang/Object;)",
|
||||
"D");
|
||||
String typeName = retType.getName();
|
||||
switch (typeName.charAt(0)) {
|
||||
case 'b':
|
||||
case 's':
|
||||
case 'i':
|
||||
cfw.add(ByteCode.D2I);
|
||||
cfw.add(ByteCode.IRETURN);
|
||||
break;
|
||||
case 'l':
|
||||
cfw.add(ByteCode.D2L);
|
||||
cfw.add(ByteCode.LRETURN);
|
||||
break;
|
||||
case 'f':
|
||||
cfw.add(ByteCode.D2F);
|
||||
cfw.add(ByteCode.FRETURN);
|
||||
break;
|
||||
case 'd':
|
||||
cfw.add(ByteCode.DRETURN);
|
||||
break;
|
||||
default:
|
||||
throw new RuntimeException("Unexpected return type " +
|
||||
retType.toString());
|
||||
}
|
||||
} else if (retType.equals(String.class)) {
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toString", "(Ljava/lang/Object;)",
|
||||
"Ljava/lang/String;");
|
||||
cfw.add(ByteCode.ARETURN);
|
||||
} else if (retType.equals(Scriptable.class)) {
|
||||
cfw.add(ByteCode.ALOAD_0); // load 'this' to find scope from
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toObject",
|
||||
"(Ljava/lang/Object;" +
|
||||
"Lorg/mozilla/javascript/Scriptable;)",
|
||||
"Lorg/mozilla/javascript/Scriptable;");
|
||||
cfw.add(ByteCode.ARETURN);
|
||||
} else {
|
||||
// If it is a wrapped type, cast to Wrapper and call unwrap()
|
||||
cfw.add(ByteCode.DUP);
|
||||
cfw.add(ByteCode.INSTANCEOF, "org/mozilla/javascript/Wrapper");
|
||||
// skip 3 for IFEQ, 3 for CHECKCAST, and 3 for INVOKEVIRTUAL
|
||||
cfw.add(ByteCode.IFEQ, 9);
|
||||
cfw.add(ByteCode.CHECKCAST, "org/mozilla/javascript/Wrapper");
|
||||
cfw.add(ByteCode.INVOKEVIRTUAL,
|
||||
"org/mozilla/javascript/Wrapper",
|
||||
"unwrap", "()", "Ljava/lang/Object;");
|
||||
// Now cast to return type
|
||||
String retTypeStr = retType.getName().replace('.', '/');
|
||||
cfw.add(ByteCode.CHECKCAST, retTypeStr);
|
||||
cfw.add(ByteCode.ARETURN);
|
||||
}
|
||||
}
|
||||
|
||||
private static void generateOverride(ClassFileWriter cfw, String genName,
|
||||
Method m)
|
||||
{
|
||||
Class[] parms = m.getParameterTypes();
|
||||
StringBuffer sb = new StringBuffer();
|
||||
sb.append('(');
|
||||
short arrayLocal = 1; // includes this.
|
||||
for (int i = 0; i < parms.length; i++) {
|
||||
Class type = parms[i];
|
||||
appendTypeString(sb, type);
|
||||
if (type.equals(Long.TYPE) || type.equals(Double.TYPE))
|
||||
arrayLocal += 2;
|
||||
else
|
||||
arrayLocal += 1;
|
||||
}
|
||||
sb.append(')');
|
||||
appendTypeString(sb, m.getReturnType());
|
||||
String methodSignature = sb.toString();
|
||||
// System.out.println("generating " + m.getName() + methodSignature);
|
||||
// System.out.flush();
|
||||
cfw.startMethod(m.getName(), methodSignature,
|
||||
ClassFileWriter.ACC_PUBLIC);
|
||||
cfw.add(ByteCode.BIPUSH, (byte) parms.length); // > 255 parms?
|
||||
cfw.add(ByteCode.ANEWARRAY, "java/lang/Object");
|
||||
cfw.add(ByteCode.ASTORE, arrayLocal);
|
||||
|
||||
// allocate a local variable to store the scope used to wrap native objects.
|
||||
short scopeLocal = (short) (arrayLocal + 1);
|
||||
boolean loadedScope = false;
|
||||
|
||||
int paramOffset = 1;
|
||||
for (int i = 0; i < parms.length; i++) {
|
||||
cfw.add(ByteCode.ALOAD, arrayLocal);
|
||||
cfw.add(ByteCode.BIPUSH, i);
|
||||
if (parms[i].isPrimitive()) {
|
||||
paramOffset = generateWrapParam(cfw, paramOffset, parms[i]);
|
||||
} else {
|
||||
// An arbitary Java object; call Context.toObject to wrap in
|
||||
// a Scriptable object
|
||||
cfw.add(ByteCode.ALOAD, paramOffset++);
|
||||
if (! loadedScope) {
|
||||
// load this.self into a local the first time it's needed.
|
||||
// it will provide the scope needed by Context.toObject().
|
||||
cfw.add(ByteCode.ALOAD_0);
|
||||
cfw.add(ByteCode.GETFIELD, genName, "self",
|
||||
"Lorg/mozilla/javascript/Scriptable;");
|
||||
cfw.add(ByteCode.ASTORE, scopeLocal);
|
||||
loadedScope = true;
|
||||
}
|
||||
cfw.add(ByteCode.ALOAD, scopeLocal);
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/Context",
|
||||
"toObject",
|
||||
"(Ljava/lang/Object;" +
|
||||
"Lorg/mozilla/javascript/Scriptable;)",
|
||||
"Lorg/mozilla/javascript/Scriptable;");
|
||||
}
|
||||
cfw.add(ByteCode.AASTORE);
|
||||
}
|
||||
|
||||
cfw.add(ByteCode.ALOAD_0); // this
|
||||
cfw.add(ByteCode.GETFIELD, genName, "o",
|
||||
"Lorg/mozilla/javascript/FlattenedObject;");
|
||||
|
||||
cfw.addLoadConstant(m.getName());
|
||||
cfw.add(ByteCode.ALOAD, arrayLocal);
|
||||
|
||||
// go through utility method, which creates a Context to run the
|
||||
// method in.
|
||||
cfw.add(ByteCode.INVOKESTATIC,
|
||||
"org/mozilla/javascript/JavaAdapter",
|
||||
"callMethod",
|
||||
"(Lorg/mozilla/javascript/FlattenedObject;" +
|
||||
"Ljava/lang/Object;[Ljava/lang/Object;)",
|
||||
"Ljava/lang/Object;");
|
||||
|
||||
Class retType = m.getReturnType();
|
||||
if (retType.equals(Void.TYPE)) {
|
||||
cfw.add(ByteCode.POP);
|
||||
cfw.add(ByteCode.RETURN);
|
||||
} else {
|
||||
generateReturnResult(cfw, retType);
|
||||
}
|
||||
cfw.stopMethod((short)(scopeLocal + 1), null);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a fully qualified method name concatenated with its signature.
|
||||
*/
|
||||
private static String getMethodSignature(Method method) {
|
||||
Class[] parms = method.getParameterTypes();
|
||||
StringBuffer sb = new StringBuffer();
|
||||
sb.append(method.getName());
|
||||
sb.append('(');
|
||||
for (int i = 0; i < parms.length; i++) {
|
||||
Class type = parms[i];
|
||||
appendTypeString(sb, type);
|
||||
}
|
||||
sb.append(')');
|
||||
appendTypeString(sb, method.getReturnType());
|
||||
return sb.toString();
|
||||
}
|
||||
|
||||
private static StringBuffer appendTypeString(StringBuffer sb, Class type)
|
||||
{
|
||||
while (type.isArray()) {
|
||||
sb.append('[');
|
||||
type = type.getComponentType();
|
||||
}
|
||||
if (type.isPrimitive()) {
|
||||
if (type.equals(Boolean.TYPE)) {
|
||||
sb.append('Z');
|
||||
} else
|
||||
if (type.equals(Long.TYPE)) {
|
||||
sb.append('J');
|
||||
} else {
|
||||
String typeName = type.getName();
|
||||
sb.append(Character.toUpperCase(typeName.charAt(0)));
|
||||
}
|
||||
} else {
|
||||
sb.append('L');
|
||||
sb.append(type.getName().replace('.', '/'));
|
||||
sb.append(';');
|
||||
}
|
||||
return sb;
|
||||
}
|
||||
|
||||
static final class MyClassLoader extends ClassLoader {
|
||||
public Class defineClass(String name, byte data[]) {
|
||||
return super.defineClass(name, data, 0, data.length);
|
||||
}
|
||||
|
||||
protected Class loadClass(String name, boolean resolve)
|
||||
throws ClassNotFoundException
|
||||
{
|
||||
Class clazz = findLoadedClass(name);
|
||||
if (clazz == null) {
|
||||
ClassLoader loader = getClass().getClassLoader();
|
||||
if (loader != null)
|
||||
return loader.loadClass(name);
|
||||
clazz = findSystemClass(name);
|
||||
}
|
||||
if (resolve)
|
||||
resolveClass(clazz);
|
||||
return clazz;
|
||||
}
|
||||
|
||||
private java.util.Hashtable loaded;
|
||||
}
|
||||
|
||||
private static int serial;
|
||||
private static MyClassLoader classLoader = new MyClassLoader();
|
||||
}
|
||||
|
|
@ -33,6 +33,28 @@ public class LocalVariable {
|
|||
|
||||
public String getName() { return itsName; }
|
||||
|
||||
/**
|
||||
* Return the starting PC where this variable is live, or -1
|
||||
* if it is not a Java register.
|
||||
*/
|
||||
public int getStartPC() {
|
||||
return -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the Java register number or -1 if it is not a Java register.
|
||||
*/
|
||||
public short getJRegister() {
|
||||
return -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return true if the local variable is a Java register with double type.
|
||||
*/
|
||||
public boolean isNumber() {
|
||||
return false;
|
||||
}
|
||||
|
||||
private String itsName;
|
||||
private int itsIndex = -1;
|
||||
|
||||
|
|
|
|||
|
|
@ -112,7 +112,7 @@ public class VariableTable {
|
|||
itsVariables.addElement(lVar);
|
||||
itsVariableNames.put(vName, new Integer(index));
|
||||
}
|
||||
|
||||
|
||||
// a list of the formal parameters and local variables
|
||||
protected Vector itsVariables = new Vector();
|
||||
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче