/*
 * Copyright (c) 1997, 2012, 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.xml.internal.ws.spi.db;

import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;


/**
 * MethodGetter
 * @author shih-chang.chen@oracle.com
 * @exclude
 */
public class MethodGetter extends PropertyGetterBase {

    private Method method;

    public MethodGetter(Method m) {
        method = m;
        type = m.getReturnType();
    }

    public Method getMethod() {
        return method;
    }

    public <A> A getAnnotation(Class<A> annotationType) {
        Class c = annotationType;
        return (A) method.getAnnotation(c);
    }


    static class PrivilegedGetter implements PrivilegedExceptionAction {
        private Object value;
        private Method method;
        private Object instance;
        public PrivilegedGetter(Method m, Object instance) {
            super();
            this.method = m;
            this.instance = instance;
        }
        public Object run() throws IllegalAccessException {
            if (!method.isAccessible()) {
                method.setAccessible(true);
            }
            try {
                value = method.invoke(instance, new Object[0]);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return null;
        }
    }

    public Object get(final Object instance) {
        final Object[] args = new Object[0];
        try {
            if (method.isAccessible()) {
                return method.invoke(instance, args);
            } else {
                PrivilegedGetter privilegedGetter = new PrivilegedGetter(method, instance);
                try {
                    AccessController.doPrivileged(privilegedGetter);
                } catch (PrivilegedActionException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                return privilegedGetter.value;
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }
}