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/*
 * Copyright (c) 2005, 2011, 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
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 */

package com.sun.script.util;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.PrivilegedExceptionAction;

import javax.script.Invocable;
import javax.script.ScriptException;

/*
 * java.lang.reflect.Proxy based interface implementor. This is meant
 * to be used to implement Invocable.getInterface.
 *
 * @author Mike Grogan
 * @since 1.6
 */
public class InterfaceImplementor {

    private Invocable engine;

    /** Creates a new instance of Invocable */
    public InterfaceImplementor(Invocable engine) {
        this.engine = engine;
    }

    private final class InterfaceImplementorInvocationHandler
                        implements InvocationHandler {
        private Object thiz;
        private AccessControlContext accCtxt;

        public InterfaceImplementorInvocationHandler(Object thiz,
            AccessControlContext accCtxt) {
            this.thiz = thiz;
            this.accCtxt = accCtxt;
        }

        public Object invoke(Object proxy , Method method, Object[] args)
        throws java.lang.Throwable {
            // give chance to convert input args
            args = convertArguments(method, args);
            Object result;
            final Method m = method;
            final Object[] a = args;
            result = AccessController.doPrivileged(new PrivilegedExceptionAction