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Java example source code file (Injector.java)
The Injector.java Java example source code/* * Copyright (c) 2008, 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.model; import javax.xml.ws.WebServiceException; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.net.URL; import java.security.AccessController; import java.security.PrivilegedAction; import java.util.logging.Level; import java.util.logging.Logger; /** * A {@link ClassLoader} used to "inject" wrapper and exception bean classes * into the VM. * * @author Jitendra kotamraju */ final class Injector { private static final Logger LOGGER = Logger.getLogger(Injector.class.getName()); private static final Method defineClass; private static final Method resolveClass; private static final Method getPackage; private static final Method definePackage; static { try { defineClass = ClassLoader.class.getDeclaredMethod("defineClass",String.class,byte[].class,Integer.TYPE,Integer.TYPE); resolveClass = ClassLoader.class.getDeclaredMethod("resolveClass",Class.class); getPackage = ClassLoader.class.getDeclaredMethod("getPackage", String.class); definePackage = ClassLoader.class.getDeclaredMethod("definePackage", String.class, String.class, String.class, String.class, String.class, String.class, String.class, URL.class); } catch (NoSuchMethodException e) { // impossible throw new NoSuchMethodError(e.getMessage()); } AccessController.doPrivileged(new PrivilegedAction<Void>() { public Void run() { // TODO: check security implication // do these setAccessible allow anyone to call these methods freely?s defineClass.setAccessible(true); resolveClass.setAccessible(true); getPackage.setAccessible(true); definePackage.setAccessible(true); return null; } }); } static synchronized Class inject(ClassLoader cl, String className, byte[] image) { // To avoid race conditions let us check if the classloader // already contains the class try { return cl.loadClass(className); } catch (ClassNotFoundException e) { // nothing to do } try { int packIndex = className.lastIndexOf('.'); if (packIndex != -1) { String pkgname = className.substring(0, packIndex); // Check if package already loaded. Package pkg = (Package)getPackage.invoke(cl, pkgname); if (pkg == null) { definePackage.invoke(cl, pkgname, null, null, null, null, null, null, null); } } Class c = (Class)defineClass.invoke(cl,className.replace('/','.'),image,0,image.length); resolveClass.invoke(cl, c); return c; } catch (IllegalAccessException e) { LOGGER.log(Level.FINE,"Unable to inject "+className,e); throw new WebServiceException(e); } catch (InvocationTargetException e) { LOGGER.log(Level.FINE,"Unable to inject "+className,e); throw new WebServiceException(e); } } } Other Java examples (source code examples)Here is a short list of links related to this Java Injector.java source code file: |
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