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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 Rhino code, released
* May 6, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1997-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License Version 2 or later (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
* MPL, indicate your decision by deleting the provisions above and replacing
* 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 MPL or the GPL.
*
* ***** END LICENSE BLOCK ***** */
/*
Environment.java
Wraps java.lang.System properties.
by Patrick C. Beard <beard@netscape.com>
*/
package org.mozilla.javascript.tools.shell;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptRuntime;
import org.mozilla.javascript.ScriptableObject;
import java.util.Vector;
import java.util.Enumeration;
import java.util.Properties;
/**
* Environment, intended to be instantiated at global scope, provides
* a natural way to access System properties from JavaScript.
*
* @author Patrick C. Beard
*/
public class Environment extends ScriptableObject
{
static final long serialVersionUID = -430727378460177065L;
private Environment thePrototypeInstance = null;
public static void defineClass(ScriptableObject scope) {
try {
ScriptableObject.defineClass(scope, Environment.class);
} catch (Exception e) {
throw new Error(e.getMessage());
}
}
public String getClassName() {
return "Environment";
}
public Environment() {
if (thePrototypeInstance == null)
thePrototypeInstance = this;
}
public Environment(ScriptableObject scope) {
setParentScope(scope);
Object ctor = ScriptRuntime.getTopLevelProp(scope, "Environment");
if (ctor != null && ctor instanceof Scriptable) {
Scriptable s = (Scriptable) ctor;
setPrototype((Scriptable) s.get("prototype", s));
}
}
public boolean has(String name, Scriptable start) {
if (this == thePrototypeInstance)
return super.has(name, start);
return (System.getProperty(name) != null);
}
public Object get(String name, Scriptable start) {
if (this == thePrototypeInstance)
return super.get(name, start);
String result = System.getProperty(name);
if (result != null)
return ScriptRuntime.toObject(getParentScope(), result);
else
return Scriptable.NOT_FOUND;
}
public void put(String name, Scriptable start, Object value) {
if (this == thePrototypeInstance)
super.put(name, start, value);
else
System.getProperties().put(name, ScriptRuntime.toString(value));
}
private Object[] collectIds() {
Properties props = System.getProperties();
Enumeration names = props.propertyNames();
Vector keys = new Vector();
while (names.hasMoreElements())
keys.addElement(names.nextElement());
Object[] ids = new Object[keys.size()];
keys.copyInto(ids);
return ids;
}
public Object[] getIds() {
if (this == thePrototypeInstance)
return super.getIds();
return collectIds();
}
public Object[] getAllIds() {
if (this == thePrototypeInstance)
return super.getAllIds();
return collectIds();
}
}
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