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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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* Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
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* The contents of this file are subject to the terms of either the GNU
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* General Public License Version 2 only ("GPL") or the Common Development
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* and Distribution License("CDDL") (collectively, the "License"). You
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* may not use this file except in compliance with the License. You can
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* obtain a copy of the License at
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* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* or packager/legal/LICENSE.txt. See the License for the specific
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* language governing permissions and limitations under the License.
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* When distributing the software, include this License Header Notice in each
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* file and include the License file at packager/legal/LICENSE.txt.
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* GPL Classpath Exception:
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* Oracle designates this particular file as subject to the "Classpath"
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* exception as provided by Oracle in the GPL Version 2 section of the License
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* file that accompanied this code.
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* If applicable, add the following below the License Header, with the fields
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* enclosed by brackets [] replaced by your own identifying information:
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* "Portions Copyright [year] [name of copyright owner]"
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* If you wish your version of this file to be governed by only the CDDL or
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* only the GPL Version 2, indicate your decision by adding "[Contributor]
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* elects to include this software in this distribution under the [CDDL or GPL
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* Version 2] license." If you don't indicate a single choice of license, a
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* recipient has the option to distribute your version of this file under
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* either the CDDL, the GPL Version 2 or to extend the choice of license to
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* its licensees as provided above. However, if you add GPL Version 2 code
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* and therefore, elected the GPL Version 2 license, then the option applies
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* only if the new code is made subject to such option by the copyright
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package com.sun.xml.bind.v2.runtime.reflect.opt;
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import java.io.InputStream;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import com.sun.xml.bind.Util;
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import com.sun.xml.bind.v2.bytecode.ClassTailor;
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* @author Kohsuke Kawaguchi
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class AccessorInjector {
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private static final Logger logger = Util.getClassLogger();
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protected static final boolean noOptimize =
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Util.getSystemProperty(ClassTailor.class.getName()+".noOptimize")!=null;
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logger.info("The optimized code generation is disabled");
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* Loads the optimized class and returns it.
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* if it fails for some reason.
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public static Class<?> prepare(
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Class beanClass, String templateClassName, String newClassName, String... replacements ) {
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ClassLoader cl = SecureLoader.getClassClassLoader(beanClass);
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if(cl==null) return null; // how do I inject classes to this "null" class loader? for now, back off.
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synchronized (AccessorInjector.class) {
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c = Injector.find(cl,newClassName);
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byte[] image = tailor(templateClassName,newClassName,replacements);
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// new FileOutputStream("debug.class").write(image);
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// } catch (IOException e) {
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// e.printStackTrace();
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c = Injector.inject(cl,newClassName,image);
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} catch(SecurityException e) {
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// we don't have enough permission to do this
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logger.log(Level.INFO,"Unable to create an optimized TransducedAccessor ",e);
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* Customizes a class file by replacing constant pools.
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* @param templateClassName
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* The resouce that contains the template class file.
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* @param replacements
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* A list of pair of strings that specify the substitution
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* {@code String[]{search_0, replace_0, search_1, replace_1, ..., search_n, replace_n }
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* The search strings found in the constant pool will be replaced by the corresponding
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* replacement string.
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private static byte[] tailor( String templateClassName, String newClassName, String... replacements ) {
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InputStream resource;
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if(CLASS_LOADER!=null)
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resource = CLASS_LOADER.getResourceAsStream(templateClassName+".class");
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resource = ClassLoader.getSystemResourceAsStream(templateClassName+".class");
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return ClassTailor.tailor(resource,templateClassName,newClassName,replacements);
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private static final ClassLoader CLASS_LOADER = SecureLoader.getClassClassLoader(AccessorInjector.class);