/*
* Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.script.javascript;
import javax.script.Invocable;
import sun.org.mozilla.javascript.*;
/**
* This class implements Rhino-like JavaAdapter to help implement a Java
* interface in JavaScript. We support this using Invocable.getInterface.
* Using this JavaAdapter, script author could write:
*
* var r = new java.lang.Runnable() {
* run: function() { script... }
* };
*
* r.run();
* new java.lang.Thread(r).start();
*
* Note that Rhino's JavaAdapter support allows extending a Java class and/or
* implementing one or more interfaces. This JavaAdapter implementation does
* not support these.
*
* @author A. Sundararajan
* @since 1.6
*/
final class JavaAdapter extends ScriptableObject implements Function {
private JavaAdapter(Invocable engine) {
this.engine = engine;
}
static void init(Context cx, Scriptable scope, boolean sealed)
throws RhinoException {
RhinoTopLevel topLevel = (RhinoTopLevel) scope;
Invocable engine = topLevel.getScriptEngine();
JavaAdapter obj = new JavaAdapter(engine);
obj.setParentScope(scope);
obj.setPrototype(getFunctionPrototype(scope));
/*
* Note that we can't use defineProperty. A property of this
* name is already defined in Context.initStandardObjects. We
* simply overwrite the property value!
*/
ScriptableObject.putProperty(topLevel, "JavaAdapter", obj);
}
public String getClassName() {
return "JavaAdapter";
}
public Object call(Context cx, Scriptable scope, Scriptable thisObj,
Object[] args) throws RhinoException {
return construct(cx, scope, args);
}
public Scriptable construct(Context cx, Scriptable scope, Object[] args)
throws RhinoException {
if (args.length == 2) {
Class<?> clazz = null;
Object obj1 = args[0];
if (obj1 instanceof Wrapper) {
Object o = ((Wrapper)obj1).unwrap();
if (o instanceof Class && ((Class)o).isInterface()) {
clazz = (Class) o;
}
} else if (obj1 instanceof Class) {
if (((Class)obj1).isInterface()) {
clazz = (Class) obj1;
}
}
if (clazz == null) {
throw Context.reportRuntimeError("JavaAdapter: first arg should be interface Class");
}
Scriptable topLevel = ScriptableObject.getTopLevelScope(scope);
return cx.toObject(engine.getInterface(args[1], clazz), topLevel);
} else {
throw Context.reportRuntimeError("JavaAdapter requires two arguments");
}
}
private Invocable engine;
}