1 /* 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.xml.internal.ws.policy.privateutil; 27 28 import java.lang.reflect.InvocationTargetException; 29 import java.lang.reflect.Method; 30 import java.util.logging.Level; 31 import java.util.logging.Logger; 32 33 /** 34 * Utility class to invoke sun.reflect.misc.MethodUtil.invoke() if available. If not (other then Oracle JDK) fallbacks 35 * to java.lang,reflect.Method.invoke() 36 */ 37 class MethodUtil { 38 39 private static final Logger LOGGER = Logger.getLogger(MethodUtil.class.getName()); 40 private static final Method INVOKE_METHOD; 41 42 static { 43 Method method; 44 try { 45 Class<?> clazz = Class.forName("sun.reflect.misc.MethodUtil"); 46 method = clazz.getMethod("invoke", Method.class, Object.class, Object[].class); 47 if (LOGGER.isLoggable(Level.FINE)) { 48 LOGGER.log(Level.FINE, "Class sun.reflect.misc.MethodUtil found; it will be used to invoke methods."); 49 } 50 } catch (Throwable t) { 51 method = null; 52 if (LOGGER.isLoggable(Level.FINE)) { 53 LOGGER.log(Level.FINE, "Class sun.reflect.misc.MethodUtil not found, probably non-Oracle JVM"); 54 } 55 } 56 INVOKE_METHOD = method; 57 } 58 59 static Object invoke(Object target, Method method, Object[] args) throws IllegalAccessException, InvocationTargetException { 60 if (INVOKE_METHOD != null) { 61 // sun.reflect.misc.MethodUtil.invoke(method, owner, args) 62 if (LOGGER.isLoggable(Level.FINE)) { 63 LOGGER.log(Level.FINE, "Invoking method using sun.reflect.misc.MethodUtil"); 64 } 65 try { 66 return INVOKE_METHOD.invoke(null, method, target, args); 67 } catch (InvocationTargetException ite) { 68 // unwrap invocation exception added by reflection code ... 69 throw unwrapException(ite); 70 } 71 } else { 72 // other then Oracle JDK ... 73 if (LOGGER.isLoggable(Level.FINE)) { 74 LOGGER.log(Level.FINE, "Invoking method directly, probably non-Oracle JVM"); 75 } 76 return method.invoke(target, args); 77 } 78 } 79 80 private static InvocationTargetException unwrapException(InvocationTargetException ite) { 81 Throwable targetException = ite.getTargetException(); 82 if (targetException != null && targetException instanceof InvocationTargetException) { 83 if (LOGGER.isLoggable(Level.FINE)) { 84 LOGGER.log(Level.FINE, "Unwrapping invocation target exception"); 85 } 86 return (InvocationTargetException) targetException; 87 } else { 88 return ite; 89 } 90 } 91 92 }