/* -*- 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, 1999.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1997-2000
* 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
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* 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 ***** */
package org.mozilla.javascript.jdk13;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Member;
import java.lang.reflect.Proxy;
import org.mozilla.javascript.*;
public class VMBridge_jdk13 extends VMBridge
{
private ThreadLocal contextLocal = new ThreadLocal();
protected Object getThreadContextHelper()
{
// To make subsequent batch calls to getContext/setContext faster
// associate permanently one element array with contextLocal
// so getContext/setContext would need just to read/write the first
// array element.
// Note that it is necessary to use Object[], not Context[] to allow
// garbage collection of Rhino classes. For details see comments
// by Attila Szegedi in
// https://bugzilla.mozilla.org/show_bug.cgi?id=281067#c5
Object[] storage = (Object[])contextLocal.get();
if (storage == null) {
storage = new Object[1];
contextLocal.set(storage);
}
return storage;
}
protected Context getContext(Object contextHelper)
{
Object[] storage = (Object[])contextHelper;
return (Context)storage[0];
}
protected void setContext(Object contextHelper, Context cx)
{
Object[] storage = (Object[])contextHelper;
storage[0] = cx;
}
protected ClassLoader getCurrentThreadClassLoader()
{
return Thread.currentThread().getContextClassLoader();
}
protected boolean tryToMakeAccessible(Object accessibleObject)
{
if (!(accessibleObject instanceof AccessibleObject)) {
return false;
}
AccessibleObject accessible = (AccessibleObject)accessibleObject;
if (accessible.isAccessible()) {
return true;
}
try {
accessible.setAccessible(true);
} catch (Exception ex) { }
return accessible.isAccessible();
}
protected Object getInterfaceProxyHelper(ContextFactory cf,
Class[] interfaces)
{
// XXX: How to handle interfaces array withclasses from different
// class loaders? Using cf.getApplicationClassLoader() ?
ClassLoader loader = interfaces[0].getClassLoader();
Class cl = Proxy.getProxyClass(loader, interfaces);
Constructor c;
try {
c = cl.getConstructor(new Class[] { InvocationHandler.class });
} catch (NoSuchMethodException ex) {
// Should not happen
throw Kit.initCause(new IllegalStateException(), ex);
}
return c;
}
protected Object newInterfaceProxy(Object proxyHelper,
final ContextFactory cf,
final InterfaceAdapter adapter,
final Object target,
final Scriptable topScope)
{
Constructor c = (Constructor)proxyHelper;
InvocationHandler handler = new InvocationHandler() {
public Object invoke(Object proxy,
Method method,
Object[] args)
{
return adapter.invoke(cf, target, topScope, method, args);
}
};
Object proxy;
try {
proxy = c.newInstance(new Object[] { handler });
} catch (InvocationTargetException ex) {
throw Context.throwAsScriptRuntimeEx(ex);
} catch (IllegalAccessException ex) {
// Shouls not happen
throw Kit.initCause(new IllegalStateException(), ex);
} catch (InstantiationException ex) {
// Shouls not happen
throw Kit.initCause(new IllegalStateException(), ex);
}
return proxy;
}
protected boolean isVarArgs(Member member) {
return false;
}
}