mozilla
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pjs
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pjs/js/jsdj/classes/netscape/jsdebug/Value.java

287 строки
9.6 KiB
Java
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
package netscape.jsdebug;
/**
* The Value class represents a JavaScript jsval which may be one of many types
* and may or may not have properties
*
* @author John Bandhauer
* @version 1.1
* @since 1.1
*/
public final class Value {
private Value() {} // can only be constructed natively
public native boolean isObject();
public native boolean isNumber();
public native boolean isInt();
public native boolean isDouble();
public native boolean isString();
public native boolean isBoolean();
public native boolean isNull();
public native boolean isVoid();
public native boolean isPrimitive();
public native boolean isFunction();
public native boolean isNative();
public native boolean getBoolean();
public native int getInt();
public native double getDouble();
/**
* does a JavaScript toString conversion if value is not already a string
*/
public String getString() {
if(null == _string)
_string = _getString();
return _string;
}
public String getFunctionName() {
if(null == _functionName && isFunction())
_functionName = _getFunctionName();
return _functionName;
}
public Value getPrototype() {
if(null == _proto && !_getFlag(GOT_PROTO) && isObject()) {
_proto = _getPrototype();
_setFlag(GOT_PROTO);
}
return _proto;
}
public Value getParent() {
if(null == _parent && !_getFlag(GOT_PARENT) && isObject()) {
_parent = _getParent();
_setFlag(GOT_PARENT);
}
return _parent;
}
public Value getConstructor() {
if(null == _ctor && !_getFlag(GOT_CTOR) && isObject()) {
_ctor = _getConstructor();
_setFlag(GOT_CTOR);
}
return _ctor;
}
public String getClassName() {
if(null == _className && isObject()) {
_className = _getClassName();
}
return _className;
}
public Property[] getProperties() {
if(null == _props && !_getFlag(GOT_PROPS) && isObject()) {
_props = _getProperties();
_setFlag(GOT_PROPS);
// if we have any hints, then try to find or add their props
if(null != _hints && 0 != _hints.length) {
Property[] newProps = new Property[_hints.length];
int made = 0;
do_prop: for(int k = 0; k < _hints.length; k++) {
String name = _hints[k];
if(null == name || 0 == name.length())
continue;
// see if it already exists
if(null != _props) {
for(int i = 0; i < _props.length; i++)
if(name.equals(_props[i].getNameString()))
continue do_prop;
}
// not in our array, try to get the named prop
Property prop = _getProperty(name);
if(null != prop)
newProps[made++] = prop;
}
if(0 != made) {
if(null != _props) {
Property[] combinedProps =
new Property[_props.length+made];
System.arraycopy(_props, 0, combinedProps, 0, _props.length);
System.arraycopy(newProps, 0, combinedProps, _props.length, made);
_props = combinedProps;
}
else {
Property[] realProps = new Property[made];
System.arraycopy(newProps, 0, realProps, 0, made);
_props = realProps;
}
}
}
}
return _props;
}
public Property getProperty(String name) {
if(null == name)
return null;
Property[] props = getProperties();
if(null == props)
return null;
for(int i = 0; i < props.length; i++)
if(name.equals(props[i].getNameString()))
return props[i];
Property prop = _getProperty(name);
if(null != prop) {
Property[] newProps = new Property[props.length+1];
System.arraycopy(props, 0, newProps, 0, props.length);
newProps[props.length] = prop;
_props = newProps;
}
return prop;
}
public String[] getPropertyHints() {return _hints;}
public void setPropertyHints(String[] hints) {_hints = hints;}
public void refresh() {
_refresh();
_flags = 0;
_string = null;
_functionName = null;
_className = null;
_props = null;
_proto = null;
_parent = null;
_ctor = null;
_string4toString = null;
}
// override Object
public boolean equals(Object obj) {
try {
return _equals(_nativeJSVal, ((Value)obj)._nativeJSVal);
}
catch(ClassCastException e) {
return false;
}
}
public int hashCode() {return _nativeJSVal;}
public String toString() {
if(null == _string4toString) {
_string4toString = _typeString();
_string4toString += " ";
_string4toString += _shortValString(this);
if(isObject() && !isNull()) {
_string4toString += ", ";
_string4toString += _countOfProps() + " props";
if(isFunction()) {
_string4toString += ", ";
_string4toString += "functionName = " + getFunctionName();
}
_string4toString += ", ";
_string4toString += "classname = " + getClassName();
_string4toString += ", ";
_string4toString += "proto = " + _shortValString(getPrototype());
_string4toString += ", ";
_string4toString += "parent = " + _shortValString(getParent());
_string4toString += ", ";
_string4toString += "ctor = " + _shortValString(getConstructor());
}
}
return _string4toString;
}
// private toString formatting stuff...
private String _shortValString(Value v) {
if(null == v)
return "null";
else if(v.isFunction())
return "[function "+v.getFunctionName()+"]";
else
return v.getString();
}
private int _countOfProps() {
Property[] p = getProperties();
if(null == p)
return 0;
return p.length;
}
private String _typeString() {
StringBuffer sb = new StringBuffer(11);
sb.append(isObject() ? 'o' : '.');
sb.append(isNumber() ? 'n' : '.');
sb.append(isInt() ? 'i' : '.');
sb.append(isDouble() ? 'd' : '.');
sb.append(isString() ? 's' : '.');
sb.append(isBoolean() ? 'b' : '.');
sb.append(isNull() ? 'N' : '.');
sb.append(isVoid() ? 'V' : '.');
sb.append(isPrimitive() ? 'p' : '.');
sb.append(isFunction() ? 'f' : '.');
sb.append(isNative() ? 'n' : '.');
return sb.toString();
}
// private flagage...
private static final short GOT_PROTO = (short) (1 << 0);
private static final short GOT_PROPS = (short) (1 << 1);
private static final short GOT_PARENT = (short) (1 << 2);
private static final short GOT_CTOR = (short) (1 << 3);
private final boolean _getFlag(short b) {return 0 != (_flags & b);}
private final void _setFlag(short b) {_flags |= b;}
private final void _clearFlag(short b) {_flags &= ~b;}
private short _flags;
// private natives...
protected native void finalize();
private native void _refresh();
private native String _getString();
private native String _getFunctionName();
private native String _getClassName();
private native Property[] _getProperties();
private native Value _getPrototype();
private native Value _getParent();
private native Value _getConstructor();
private native boolean _equals(int nativeJSVal, int other_nativeJSVal);
private native Property _getProperty(String name);
// private data...
private int _nativeJSVal;
private String _string;
private String _functionName;
private String _className;
private Property[] _props;
private Value _proto;
private Value _parent;
private Value _ctor;
private String _string4toString;
private String[] _hints;
}
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