1 /* 2 * Copyright (c) 2008, 2014, 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.model; 27 28 import javax.xml.ws.WebServiceException; 29 import java.lang.reflect.InvocationTargetException; 30 import java.lang.reflect.Method; 31 import java.net.URL; 32 import java.security.AccessController; 33 import java.security.PrivilegedAction; 34 import java.util.logging.Level; 35 import java.util.logging.Logger; 36 37 /** 38 * A {@link ClassLoader} used to "inject" wrapper and exception bean classes 39 * into the VM. 40 * 41 * @author Jitendra kotamraju 42 */ 43 final class Injector { 44 45 private static final Logger LOGGER = Logger.getLogger(Injector.class.getName()); 46 47 private static final Method defineClass; 48 private static final Method resolveClass; 49 private static final Method getPackage; 50 private static final Method definePackage; 51 52 static { 53 Method[] m = AccessController.doPrivileged( 54 new PrivilegedAction<Method[]>() { 55 @Override 56 public Method[] run() { 57 return new Method[]{ 58 getMethod(ClassLoader.class, "defineClass", String.class, byte[].class, Integer.TYPE, Integer.TYPE), 59 getMethod(ClassLoader.class, "resolveClass", Class.class), 60 getMethod(ClassLoader.class, "getPackage", String.class), 61 getMethod(ClassLoader.class, "definePackage", 62 String.class, String.class, String.class, String.class, 63 String.class, String.class, String.class, URL.class) 64 }; 65 } 66 } 67 ); 68 defineClass = m[0]; 69 resolveClass = m[1]; 70 getPackage = m[2]; 71 definePackage = m[3]; 72 } 73 74 private static Method getMethod(final Class<?> c, final String methodname, final Class<?>... params) { 75 try { 76 Method m = c.getDeclaredMethod(methodname, params); 77 m.setAccessible(true); 78 return m; 79 } catch (NoSuchMethodException e) { 80 // impossible 81 throw new NoSuchMethodError(e.getMessage()); 82 } 83 } 84 85 static synchronized Class inject(ClassLoader cl, String className, byte[] image) { 86 // To avoid race conditions let us check if the classloader 87 // already contains the class 88 try { 89 return cl.loadClass(className); 90 } catch (ClassNotFoundException e) { 91 // nothing to do 92 } 93 try { 94 int packIndex = className.lastIndexOf('.'); 95 if (packIndex != -1) { 96 String pkgname = className.substring(0, packIndex); 97 // Check if package already loaded. 98 Package pkg = (Package)getPackage.invoke(cl, pkgname); 99 if (pkg == null) { 100 definePackage.invoke(cl, pkgname, null, null, null, null, null, null, null); 101 } 102 } 103 104 Class c = (Class)defineClass.invoke(cl,className.replace('/','.'),image,0,image.length); 105 resolveClass.invoke(cl, c); 106 return c; 107 } catch (IllegalAccessException e) { 108 LOGGER.log(Level.FINE,"Unable to inject "+className,e); 109 throw new WebServiceException(e); 110 } catch (InvocationTargetException e) { 111 LOGGER.log(Level.FINE,"Unable to inject "+className,e); 112 throw new WebServiceException(e); 113 } 114 } 115 116 }