1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/bind/v2/runtime/reflect/opt/AccessorInjector.java Wed Apr 27 01:27:09 2016 +0800
1.3 @@ -0,0 +1,112 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package com.sun.xml.internal.bind.v2.runtime.reflect.opt;
1.30 +
1.31 +import java.io.InputStream;
1.32 +import java.util.logging.Level;
1.33 +import java.util.logging.Logger;
1.34 +
1.35 +import com.sun.xml.internal.bind.Util;
1.36 +import com.sun.xml.internal.bind.v2.bytecode.ClassTailor;
1.37 +
1.38 +/**
1.39 + * @author Kohsuke Kawaguchi
1.40 + */
1.41 +class AccessorInjector {
1.42 +
1.43 + private static final Logger logger = Util.getClassLogger();
1.44 +
1.45 + protected static final boolean noOptimize =
1.46 + Util.getSystemProperty(ClassTailor.class.getName()+".noOptimize")!=null;
1.47 +
1.48 + static {
1.49 + if(noOptimize)
1.50 + logger.info("The optimized code generation is disabled");
1.51 + }
1.52 +
1.53 + /**
1.54 + * Loads the optimized class and returns it.
1.55 + *
1.56 + * @return null
1.57 + * if it fails for some reason.
1.58 + */
1.59 + public static Class<?> prepare(
1.60 + Class beanClass, String templateClassName, String newClassName, String... replacements ) {
1.61 +
1.62 + if(noOptimize)
1.63 + return null;
1.64 +
1.65 + try {
1.66 + ClassLoader cl = SecureLoader.getClassClassLoader(beanClass);
1.67 + if(cl==null) return null; // how do I inject classes to this "null" class loader? for now, back off.
1.68 +
1.69 + Class c = Injector.find(cl,newClassName);
1.70 + if (c==null) {
1.71 + byte[] image = tailor(templateClassName,newClassName,replacements);
1.72 + if (image==null) {
1.73 + return null;
1.74 + }
1.75 + c = Injector.inject(cl,newClassName,image);
1.76 + if (c == null) {
1.77 + Injector.find(cl, newClassName);
1.78 + }
1.79 + }
1.80 + return c;
1.81 + } catch(SecurityException e) {
1.82 + // we don't have enough permission to do this
1.83 + logger.log(Level.INFO,"Unable to create an optimized TransducedAccessor ",e);
1.84 + return null;
1.85 + }
1.86 + }
1.87 +
1.88 +
1.89 + /**
1.90 + * Customizes a class file by replacing constant pools.
1.91 + *
1.92 + * @param templateClassName
1.93 + * The resource that contains the template class file.
1.94 + * @param replacements
1.95 + * A list of pair of strings that specify the substitution
1.96 + * {@code String[]{search_0, replace_0, search_1, replace_1, ..., search_n, replace_n }
1.97 + *
1.98 + * The search strings found in the constant pool will be replaced by the corresponding
1.99 + * replacement string.
1.100 + */
1.101 + private static byte[] tailor( String templateClassName, String newClassName, String... replacements ) {
1.102 + InputStream resource;
1.103 + if(CLASS_LOADER!=null)
1.104 + resource = CLASS_LOADER.getResourceAsStream(templateClassName+".class");
1.105 + else
1.106 + resource = ClassLoader.getSystemResourceAsStream(templateClassName+".class");
1.107 + if(resource==null)
1.108 + return null;
1.109 +
1.110 + return ClassTailor.tailor(resource,templateClassName,newClassName,replacements);
1.111 + }
1.112 +
1.113 + private static final ClassLoader CLASS_LOADER = SecureLoader.getClassClassLoader(AccessorInjector.class);
1.114 +
1.115 +}
