src/share/jaxws_classes/com/sun/tools/internal/xjc/runtime/JAXBContextFactory.java

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

author
ohair
date
Tue, 06 Mar 2012 16:09:35 -0800
changeset 286
f50545b5e2f1
parent 0
373ffda63c9a
permissions
-rw-r--r--

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

aoqi@0 1 /*
aoqi@0 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0 4 *
aoqi@0 5 * This code is free software; you can redistribute it and/or modify it
aoqi@0 6 * under the terms of the GNU General Public License version 2 only, as
aoqi@0 7 * published by the Free Software Foundation. Oracle designates this
aoqi@0 8 * particular file as subject to the "Classpath" exception as provided
aoqi@0 9 * by Oracle in the LICENSE file that accompanied this code.
aoqi@0 10 *
aoqi@0 11 * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0 14 * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0 15 * accompanied this code).
aoqi@0 16 *
aoqi@0 17 * You should have received a copy of the GNU General Public License version
aoqi@0 18 * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0 20 *
aoqi@0 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0 22 * or visit www.oracle.com if you need additional information or have any
aoqi@0 23 * questions.
aoqi@0 24 */
aoqi@0 25
aoqi@0 26 package com.sun.tools.internal.xjc.runtime;
aoqi@0 27
aoqi@0 28 import java.util.ArrayList;
aoqi@0 29 import java.util.List;
aoqi@0 30 import java.util.Map;
aoqi@0 31 import java.util.StringTokenizer;
aoqi@0 32
aoqi@0 33 import javax.xml.bind.JAXBContext;
aoqi@0 34 import javax.xml.bind.JAXBException;
aoqi@0 35
aoqi@0 36 /**
aoqi@0 37 * This class implements the actual logic of {@link JAXBContext#newInstance}.
aoqi@0 38 *
aoqi@0 39 * <p>
aoqi@0 40 * This class works as a facade and all the actual work is delegated to
aoqi@0 41 * a JAXB provider that happens to be in the runtime (not necessarily the JAXB RI.)
aoqi@0 42 * This allows the generated code to be run with any JAXB provider.
aoqi@0 43 *
aoqi@0 44 * <p>
aoqi@0 45 * This code is only used when XJC generates interfaces/implementations.
aoqi@0 46 *
aoqi@0 47 * <p>
aoqi@0 48 * The trick to make this work is two ObjectFactory classes that we generate
aoqi@0 49 * in the interface/implementation mode.
aoqi@0 50 *
aoqi@0 51 * <p>
aoqi@0 52 * The public ObjectFactory follows the spec, and this is the one that's exposed
aoqi@0 53 * to users. The public ObjectFactory refers to interfaces, so they aren't
aoqi@0 54 * directly usable by a JAXB 2.0 implementation.
aoqi@0 55 *
aoqi@0 56 * <p>
aoqi@0 57 * The private one lives in the impl package, and this one is indistinguishable
aoqi@0 58 * from the ObjectFactory that we generate for the value class generation mode.
aoqi@0 59 * This private ObjectFactory refers to implementation classes, which are
aoqi@0 60 * also indistinguishable from value classes that JAXB generates.
aoqi@0 61 *
aoqi@0 62 * <p>
aoqi@0 63 * All in all, the private ObjectFactory plus implementation classes give
aoqi@0 64 * a JAXB provider an illusion that they are dealing with value classes
aoqi@0 65 * that happens to implement some interfaces.
aoqi@0 66 *
aoqi@0 67 * <p>
aoqi@0 68 * In this way, the JAXB RI can provide the portability even for the
aoqi@0 69 * interface/implementation generation mode.
aoqi@0 70 *
aoqi@0 71 * @since 2.0
aoqi@0 72 * @author Kohsuke Kawaguchi
aoqi@0 73 */
aoqi@0 74 public class JAXBContextFactory {
aoqi@0 75 private static final String DOT_OBJECT_FACTORY = ".ObjectFactory";
aoqi@0 76 private static final String IMPL_DOT_OBJECT_FACTORY = ".impl.ObjectFactory";
aoqi@0 77
aoqi@0 78 /**
aoqi@0 79 * The JAXB API will invoke this method via reflection
aoqi@0 80 */
aoqi@0 81 public static JAXBContext createContext( Class[] classes, Map properties ) throws JAXBException {
aoqi@0 82 Class[] r = new Class[classes.length];
aoqi@0 83 boolean modified = false;
aoqi@0 84
aoqi@0 85 // find any reference to our 'public' ObjectFactory and
aoqi@0 86 // replace that to our 'private' ObjectFactory.
aoqi@0 87 for( int i=0; i<r.length; i++ ) {
aoqi@0 88 Class c = classes[i];
aoqi@0 89 String name = c.getName();
aoqi@0 90 if(name.endsWith(DOT_OBJECT_FACTORY)
aoqi@0 91 && !name.endsWith(IMPL_DOT_OBJECT_FACTORY)) {
aoqi@0 92 // we never generate into the root package, so no need to worry about FQCN "ObjectFactory"
aoqi@0 93
aoqi@0 94 // if we find one, tell the real JAXB provider to
aoqi@0 95 // load foo.bar.impl.ObjectFactory
aoqi@0 96 name = name.substring(0,name.length()-DOT_OBJECT_FACTORY.length())+IMPL_DOT_OBJECT_FACTORY;
aoqi@0 97
aoqi@0 98 try {
aoqi@0 99 c = getClassClassLoader(c).loadClass(name);
aoqi@0 100 } catch (ClassNotFoundException e) {
aoqi@0 101 throw new JAXBException(e);
aoqi@0 102 }
aoqi@0 103
aoqi@0 104 modified = true;
aoqi@0 105 }
aoqi@0 106
aoqi@0 107 r[i] = c;
aoqi@0 108 }
aoqi@0 109
aoqi@0 110 if(!modified) {
aoqi@0 111 // if the class list doesn't contain any of our classes,
aoqi@0 112 // this ContextFactory shouldn't have been called in the first place
aoqi@0 113 // if we simply continue, we'll just end up with the infinite recursion.
aoqi@0 114
aoqi@0 115 // the only case that I can think of where this could happen is
aoqi@0 116 // when the user puts additional classes into the JAXB-generated
aoqi@0 117 // package and pass them to JAXBContext.newInstance().
aoqi@0 118 // Under normal use, this shouldn't happen.
aoqi@0 119
aoqi@0 120 // anyway, bail out now.
aoqi@0 121 // if you hit this problem and wondering how to get around the problem,
aoqi@0 122 // subscribe and send a note to users@jaxb.dev.java.net (http://jaxb.dev.java.net/)
aoqi@0 123 throw new JAXBException("Unable to find a JAXB implementation to delegate");
aoqi@0 124 }
aoqi@0 125
aoqi@0 126 // delegate to the JAXB provider in the system
aoqi@0 127 return JAXBContext.newInstance(r,properties);
aoqi@0 128 }
aoqi@0 129
aoqi@0 130
aoqi@0 131 /**
aoqi@0 132 * The JAXB API will invoke this method via reflection
aoqi@0 133 */
aoqi@0 134 public static JAXBContext createContext( String contextPath,
aoqi@0 135 ClassLoader classLoader, Map properties ) throws JAXBException {
aoqi@0 136
aoqi@0 137 List<Class> classes = new ArrayList<Class>();
aoqi@0 138 StringTokenizer tokens = new StringTokenizer(contextPath,":");
aoqi@0 139
aoqi@0 140 // each package should be pointing to a JAXB RI generated
aoqi@0 141 // content interface package.
aoqi@0 142 //
aoqi@0 143 // translate them into a list of private ObjectFactories.
aoqi@0 144 try {
aoqi@0 145 while(tokens.hasMoreTokens()) {
aoqi@0 146 String pkg = tokens.nextToken();
aoqi@0 147 classes.add(classLoader.loadClass(pkg+IMPL_DOT_OBJECT_FACTORY));
aoqi@0 148 }
aoqi@0 149 } catch (ClassNotFoundException e) {
aoqi@0 150 throw new JAXBException(e);
aoqi@0 151 }
aoqi@0 152
aoqi@0 153 // delegate to the JAXB provider in the system
aoqi@0 154 return JAXBContext.newInstance(classes.toArray(new Class[classes.size()]),properties);
aoqi@0 155 }
aoqi@0 156
aoqi@0 157 private static ClassLoader getClassClassLoader(final Class c) {
aoqi@0 158 if (System.getSecurityManager() == null) {
aoqi@0 159 return c.getClassLoader();
aoqi@0 160 } else {
aoqi@0 161 return (ClassLoader) java.security.AccessController.doPrivileged(
aoqi@0 162 new java.security.PrivilegedAction() {
aoqi@0 163 public java.lang.Object run() {
aoqi@0 164 return c.getClassLoader();
aoqi@0 165 }
aoqi@0 166 });
aoqi@0 167 }
aoqi@0 168 }
aoqi@0 169
aoqi@0 170 }

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