com.sun.ejb.containers.InvocationHandlerUtil Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of payara-embedded-all Show documentation
Payara-Embedded-All Distribution of the Payara Project
There is a newer version: 4.1.2.181
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.ejb.containers;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Proxy;
import java.lang.reflect.Method;

import javax.ejb.EJBException;
import java.rmi.RemoteException;

public final class InvocationHandlerUtil {

    InvocationHandlerUtil() {}

    public static Object invokeJavaObjectMethod(InvocationHandler handler,
                                         Method method, Object[] args) 
        throws EJBException {

        Object returnValue = null;

        // Can only be one of : 
        //     boolean java.lang.Object.equals(Object)
        //     int     java.lang.Object.hashCode()
        //     String  java.lang.Object.toString()
        //
        // Optimize by comparing as few characters as possible.

        switch( method.getName().charAt(0) ) {
            case 'e' :
                boolean result = false;
                if (args[0] != null) {
                    Object other = Proxy.isProxyClass(args[0].getClass()) ?
                            Proxy.getInvocationHandler(args[0]) : args[0];
                            result = handler.equals(other);
                }
                returnValue = result;
                break;
            case 'h' :
                returnValue = handler.hashCode();
                break;
            case 't' :
                returnValue = handler.toString();
                break;
            default :
                throw new EJBException(method.getName());
        }

        return returnValue;
    }

    public static boolean isDeclaredException(Throwable t,
                                       Class[] declaredExceptions) 
    {
        boolean declaredException = false;

        for(int i = 0; i < declaredExceptions.length; i++) {
            Class next = declaredExceptions[i];
            if( next.isAssignableFrom(t.getClass()) ) {
                declaredException = true;
                break;
            }
        }

        return declaredException;
    }

    public static void throwLocalException(Throwable t,
                                    Class[] declaredExceptions) 
        throws Throwable 
    {
        Throwable toThrow;

        if( (t instanceof java.lang.RuntimeException) ||
            (isDeclaredException(t, declaredExceptions)) ) {
            toThrow = t;
        } else {
            toThrow = new EJBException(t.getMessage());
            toThrow.initCause(t);
        } 
        
        throw toThrow;

    }

    public static void throwRemoteException(Throwable t,
                                     Class[] declaredExceptions)
        throws Throwable 
    {
        Throwable toThrow;

        if( (t instanceof java.lang.RuntimeException) ||
            (t instanceof java.rmi.RemoteException) ||
            (isDeclaredException(t, declaredExceptions)) ) {
            toThrow = t;
        } else {
            toThrow = new RemoteException(t.getMessage(), t);
        }

        throw toThrow;        
    }
}