Mercurial > jdk8-mips64-public > jaxws / file comparison
comparison: src/share/jaxws_classes/com/sun/xml/internal/bind/v2/runtime/reflect/opt/AccessorInjector.java
src/share/jaxws_classes/com/sun/xml/internal/bind/v2/runtime/reflect/opt/AccessorInjector.java
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| 1 /* | |
| 2 * Copyright (c) 1997, 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.bind.v2.runtime.reflect.opt; | |
| 27 | |
| 28 import java.io.InputStream; | |
| 29 import java.util.logging.Level; | |
| 30 import java.util.logging.Logger; | |
| 31 | |
| 32 import com.sun.xml.internal.bind.Util; | |
| 33 import com.sun.xml.internal.bind.v2.bytecode.ClassTailor; | |
| 34 | |
| 35 /** | |
| 36 * @author Kohsuke Kawaguchi | |
| 37 */ | |
| 38 class AccessorInjector { | |
| 39 | |
| 40 private static final Logger logger = Util.getClassLogger(); | |
| 41 | |
| 42 protected static final boolean noOptimize = | |
| 43 Util.getSystemProperty(ClassTailor.class.getName()+".noOptimize")!=null; | |
| 44 | |
| 45 static { | |
| 46 if(noOptimize) | |
| 47 logger.info("The optimized code generation is disabled"); | |
| 48 } | |
| 49 | |
| 50 /** | |
| 51 * Loads the optimized class and returns it. | |
| 52 * | |
| 53 * @return null | |
| 54 * if it fails for some reason. | |
| 55 */ | |
| 56 public static Class<?> prepare( | |
| 57 Class beanClass, String templateClassName, String newClassName, String... replacements ) { | |
| 58 | |
| 59 if(noOptimize) | |
| 60 return null; | |
| 61 | |
| 62 try { | |
| 63 ClassLoader cl = SecureLoader.getClassClassLoader(beanClass); | |
| 64 if(cl==null) return null; // how do I inject classes to this "null" class loader? for now, back off. | |
| 65 | |
| 66 Class c = Injector.find(cl,newClassName); | |
| 67 if (c==null) { | |
| 68 byte[] image = tailor(templateClassName,newClassName,replacements); | |
| 69 if (image==null) { | |
| 70 return null; | |
| 71 } | |
| 72 c = Injector.inject(cl,newClassName,image); | |
| 73 if (c == null) { | |
| 74 Injector.find(cl, newClassName); | |
| 75 } | |
| 76 } | |
| 77 return c; | |
| 78 } catch(SecurityException e) { | |
| 79 // we don't have enough permission to do this | |
| 80 logger.log(Level.INFO,"Unable to create an optimized TransducedAccessor ",e); | |
| 81 return null; | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 | |
| 86 /** | |
| 87 * Customizes a class file by replacing constant pools. | |
| 88 * | |
| 89 * @param templateClassName | |
| 90 * The resource that contains the template class file. | |
| 91 * @param replacements | |
| 92 * A list of pair of strings that specify the substitution | |
| 93 * {@code String[]{search_0, replace_0, search_1, replace_1, ..., search_n, replace_n } | |
| 94 * | |
| 95 * The search strings found in the constant pool will be replaced by the corresponding | |
| 96 * replacement string. | |
| 97 */ | |
| 98 private static byte[] tailor( String templateClassName, String newClassName, String... replacements ) { | |
| 99 InputStream resource; | |
| 100 if(CLASS_LOADER!=null) | |
| 101 resource = CLASS_LOADER.getResourceAsStream(templateClassName+".class"); | |
| 102 else | |
| 103 resource = ClassLoader.getSystemResourceAsStream(templateClassName+".class"); | |
| 104 if(resource==null) | |
| 105 return null; | |
| 106 | |
| 107 return ClassTailor.tailor(resource,templateClassName,newClassName,replacements); | |
| 108 } | |
| 109 | |
| 110 private static final ClassLoader CLASS_LOADER = SecureLoader.getClassClassLoader(AccessorInjector.class); | |
| 111 | |
| 112 } |
