aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.ws.policy.privateutil;
aoqi@0: 
aoqi@0: import java.lang.reflect.InvocationTargetException;
aoqi@0: import java.lang.reflect.Method;
aoqi@0: import java.util.logging.Level;
aoqi@0: import java.util.logging.Logger;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Utility class to invoke sun.reflect.misc.MethodUtil.invoke() if available. If not (other then Oracle JDK) fallbacks
aoqi@0:  * to java.lang,reflect.Method.invoke()
aoqi@0:  */
aoqi@0: class MethodUtil {
aoqi@0: 
aoqi@0:     private static final Logger LOGGER = Logger.getLogger(MethodUtil.class.getName());
aoqi@0:     private static final Method INVOKE_METHOD;
aoqi@0: 
aoqi@0:     static {
aoqi@0:         Method method;
aoqi@0:         try {
aoqi@0:             Class<?> clazz = Class.forName("sun.reflect.misc.MethodUtil");
aoqi@0:             method = clazz.getMethod("invoke", Method.class, Object.class, Object[].class);
aoqi@0:             if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0:                 LOGGER.log(Level.FINE, "Class sun.reflect.misc.MethodUtil found; it will be used to invoke methods.");
aoqi@0:             }
aoqi@0:         } catch (Throwable t) {
aoqi@0:             method = null;
aoqi@0:             if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0:                 LOGGER.log(Level.FINE, "Class sun.reflect.misc.MethodUtil not found, probably non-Oracle JVM");
aoqi@0:             }
aoqi@0:         }
aoqi@0:         INVOKE_METHOD = method;
aoqi@0:     }
aoqi@0: 
aoqi@0:     static Object invoke(Object target, Method method, Object[] args) throws IllegalAccessException, InvocationTargetException {
aoqi@0:         if (INVOKE_METHOD != null) {
aoqi@0:             // sun.reflect.misc.MethodUtil.invoke(method, owner, args)
aoqi@0:             if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0:                 LOGGER.log(Level.FINE, "Invoking method using sun.reflect.misc.MethodUtil");
aoqi@0:             }
aoqi@0:             try {
aoqi@0:                 return INVOKE_METHOD.invoke(null, method, target, args);
aoqi@0:             } catch (InvocationTargetException ite) {
aoqi@0:                 // unwrap invocation exception added by reflection code ...
aoqi@0:                 throw unwrapException(ite);
aoqi@0:             }
aoqi@0:         } else {
aoqi@0:             // other then Oracle JDK ...
aoqi@0:             if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0:                 LOGGER.log(Level.FINE, "Invoking method directly, probably non-Oracle JVM");
aoqi@0:             }
aoqi@0:             return method.invoke(target, args);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static InvocationTargetException unwrapException(InvocationTargetException ite) {
aoqi@0:         Throwable targetException = ite.getTargetException();
aoqi@0:         if (targetException != null && targetException instanceof InvocationTargetException) {
aoqi@0:             if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0:                 LOGGER.log(Level.FINE, "Unwrapping invocation target exception");
aoqi@0:             }
aoqi@0:             return (InvocationTargetException) targetException;
aoqi@0:         } else {
aoqi@0:             return ite;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: }