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Copy pathArguments.java
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130 lines (114 loc) · 4.38 KB
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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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 oqr
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1997-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Norris Boyd
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
package org.mozilla.javascript;
/**
* This class implements the "arguments" object.
*
* See ECMA 10.1.8
*
* @see org.mozilla.javascript.NativeCall
* @author Norris Boyd
*/
class Arguments extends ScriptableObject {
public Arguments(NativeCall activation) {
this.activation = activation;
Scriptable parent = activation.getParentScope();
setParentScope(parent);
setPrototype(ScriptableObject.getObjectPrototype(parent));
args = activation.getOriginalArguments();
int length = args.length;
Object callee = activation.funObj;
defineProperty("length", new Integer(length),
ScriptableObject.DONTENUM);
defineProperty("callee", callee, ScriptableObject.DONTENUM);
hasCaller = (activation.funObj.version <= Context.VERSION_1_3 &&
activation.funObj.version != Context.VERSION_DEFAULT);
}
public String getClassName() {
return "Arguments";
}
public boolean has(String name, Scriptable start) {
return (hasCaller && name.equals("caller")) || super.has(name, start);
}
public boolean has(int index, Scriptable start) {
Object[] args = activation.getOriginalArguments();
return (0 <= index && index < args.length) || super.has(index, start);
}
public Object get(String name, Scriptable start) {
if (hasCaller && name.equals("caller")) {
NativeCall caller = activation.caller;
if (caller == null || caller.originalArgs == null)
return null;
return caller.get("arguments", caller);
}
return super.get(name, start);
}
public Object get(int index, Scriptable start) {
if (0 <= index && index < args.length) {
NativeFunction f = activation.funObj;
if (index < f.argCount)
return activation.get(f.names[index+1], activation);
return args[index];
}
return super.get(index, start);
}
public void put(String name, Scriptable start, Object value) {
if (name.equals("caller")) {
// Set "hasCaller" to false so that we won't look up a
// computed value.
hasCaller = false;
}
super.put(name, start, value);
}
public void put(int index, Scriptable start, Object value) {
if (0 <= index && index < args.length) {
NativeFunction f = activation.funObj;
if (index < f.argCount)
activation.put(f.names[index+1], activation, value);
else
args[index] = value;
return;
}
super.put(index, start, value);
}
public void delete(String name) {
if (name.equals("caller"))
hasCaller = false;
super.delete(name);
}
private NativeCall activation;
private Object[] args;
private boolean hasCaller;
}