src/share/jaxws_classes/com/sun/xml/internal/bind/v2/runtime/reflect/opt/AccessorInjector.java

Tue, 06 Mar 2012 16:09:35 -0800

author
ohair
date
Tue, 06 Mar 2012 16:09:35 -0800
changeset 286
f50545b5e2f1
child 368
0989ad8c0860
permissions
-rw-r--r--

7150322: Stop using drop source bundles in jaxws
Reviewed-by: darcy, ohrstrom

ohair@286 1 /*
ohair@286 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
ohair@286 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ohair@286 4 *
ohair@286 5 * This code is free software; you can redistribute it and/or modify it
ohair@286 6 * under the terms of the GNU General Public License version 2 only, as
ohair@286 7 * published by the Free Software Foundation. Oracle designates this
ohair@286 8 * particular file as subject to the "Classpath" exception as provided
ohair@286 9 * by Oracle in the LICENSE file that accompanied this code.
ohair@286 10 *
ohair@286 11 * This code is distributed in the hope that it will be useful, but WITHOUT
ohair@286 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ohair@286 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ohair@286 14 * version 2 for more details (a copy is included in the LICENSE file that
ohair@286 15 * accompanied this code).
ohair@286 16 *
ohair@286 17 * You should have received a copy of the GNU General Public License version
ohair@286 18 * 2 along with this work; if not, write to the Free Software Foundation,
ohair@286 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ohair@286 20 *
ohair@286 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@286 22 * or visit www.oracle.com if you need additional information or have any
ohair@286 23 * questions.
ohair@286 24 */
ohair@286 25
ohair@286 26 package com.sun.xml.internal.bind.v2.runtime.reflect.opt;
ohair@286 27
ohair@286 28 import java.io.InputStream;
ohair@286 29 import java.util.logging.Level;
ohair@286 30 import java.util.logging.Logger;
ohair@286 31
ohair@286 32 import com.sun.xml.internal.bind.Util;
ohair@286 33 import com.sun.xml.internal.bind.v2.bytecode.ClassTailor;
ohair@286 34
ohair@286 35 /**
ohair@286 36 * @author Kohsuke Kawaguchi
ohair@286 37 */
ohair@286 38 class AccessorInjector {
ohair@286 39
ohair@286 40 private static final Logger logger = Util.getClassLogger();
ohair@286 41
ohair@286 42 protected static final boolean noOptimize =
ohair@286 43 Util.getSystemProperty(ClassTailor.class.getName()+".noOptimize")!=null;
ohair@286 44
ohair@286 45 static {
ohair@286 46 if(noOptimize)
ohair@286 47 logger.info("The optimized code generation is disabled");
ohair@286 48 }
ohair@286 49
ohair@286 50 /**
ohair@286 51 * Loads the optimized class and returns it.
ohair@286 52 *
ohair@286 53 * @return null
ohair@286 54 * if it fails for some reason.
ohair@286 55 */
ohair@286 56 public static Class<?> prepare(
ohair@286 57 Class beanClass, String templateClassName, String newClassName, String... replacements ) {
ohair@286 58
ohair@286 59 if(noOptimize)
ohair@286 60 return null;
ohair@286 61
ohair@286 62 try {
ohair@286 63 ClassLoader cl = SecureLoader.getClassClassLoader(beanClass);
ohair@286 64 if(cl==null) return null; // how do I inject classes to this "null" class loader? for now, back off.
ohair@286 65
ohair@286 66 Class c = null;
ohair@286 67 synchronized (AccessorInjector.class) {
ohair@286 68 c = Injector.find(cl,newClassName);
ohair@286 69 if(c==null) {
ohair@286 70 byte[] image = tailor(templateClassName,newClassName,replacements);
ohair@286 71 // try {
ohair@286 72 // new FileOutputStream("debug.class").write(image);
ohair@286 73 // } catch (IOException e) {
ohair@286 74 // e.printStackTrace();
ohair@286 75 // }
ohair@286 76 if(image==null)
ohair@286 77 return null;
ohair@286 78 c = Injector.inject(cl,newClassName,image);
ohair@286 79 }
ohair@286 80 }
ohair@286 81 return c;
ohair@286 82 } catch(SecurityException e) {
ohair@286 83 // we don't have enough permission to do this
ohair@286 84 logger.log(Level.INFO,"Unable to create an optimized TransducedAccessor ",e);
ohair@286 85 return null;
ohair@286 86 }
ohair@286 87 }
ohair@286 88
ohair@286 89
ohair@286 90 /**
ohair@286 91 * Customizes a class file by replacing constant pools.
ohair@286 92 *
ohair@286 93 * @param templateClassName
ohair@286 94 * The resouce that contains the template class file.
ohair@286 95 * @param replacements
ohair@286 96 * A list of pair of strings that specify the substitution
ohair@286 97 * {@code String[]{search_0, replace_0, search_1, replace_1, ..., search_n, replace_n }
ohair@286 98 *
ohair@286 99 * The search strings found in the constant pool will be replaced by the corresponding
ohair@286 100 * replacement string.
ohair@286 101 */
ohair@286 102 private static byte[] tailor( String templateClassName, String newClassName, String... replacements ) {
ohair@286 103 InputStream resource;
ohair@286 104 if(CLASS_LOADER!=null)
ohair@286 105 resource = CLASS_LOADER.getResourceAsStream(templateClassName+".class");
ohair@286 106 else
ohair@286 107 resource = ClassLoader.getSystemResourceAsStream(templateClassName+".class");
ohair@286 108 if(resource==null)
ohair@286 109 return null;
ohair@286 110
ohair@286 111 return ClassTailor.tailor(resource,templateClassName,newClassName,replacements);
ohair@286 112 }
ohair@286 113
ohair@286 114 private static final ClassLoader CLASS_LOADER = SecureLoader.getClassClassLoader(AccessorInjector.class);
ohair@286 115 }

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