jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/tools/internal/xjc/ClassLoaderBuilder.java@9c07ef4934dd

     1 /*

     2  * Copyright (c) 1997, 2012, 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  */

    26 package com.sun.tools.internal.xjc;

    28 import java.net.MalformedURLException;

    29 import java.net.URL;

    30 import java.net.URLClassLoader;

    31 import java.util.ArrayList;

    32 import java.util.Arrays;

    33 import java.util.List;

    35 import javax.xml.bind.JAXBContext;

    37 import com.sun.istack.internal.tools.MaskingClassLoader;

    38 import com.sun.istack.internal.tools.ParallelWorldClassLoader;

    40 /**

    41  * Creates a class loader configured to run XJC 1.0/2.0 safely without

    42  * interference with JAXB 2.0 API in Mustang.

    43  *

    44  * @author Kohsuke Kawaguchi

    45  */

    46 class ClassLoaderBuilder {

    48     /**

    49      * Creates a new class loader that eventually delegates to the given {@link ClassLoader}

    50      * such that XJC can be loaded by using this classloader.

    51      *

    52      * @param v

    53      *      Either "1.0" or "2.0", indicating the version of the -source value.

    54      */

    55     protected static ClassLoader createProtectiveClassLoader(ClassLoader cl, String v) throws ClassNotFoundException, MalformedURLException {

    56         if(noHack)  return cl;  // provide an escape hatch

    58         boolean mustang = false;

    60         if (SecureLoader.getClassClassLoader(JAXBContext.class) == null) {

    61             // JAXB API is loaded from the bootstrap. We need to override one with ours

    62             mustang = true;

    64             List<String> mask = new ArrayList<String>(Arrays.asList(maskedPackages));

    65             mask.add("javax.xml.bind.");

    67             cl = new MaskingClassLoader(cl,mask);

    69             URL apiUrl = cl.getResource("javax/xml/bind/JAXBPermission.class");

    70             if(apiUrl==null)

    71                 throw new ClassNotFoundException("There's no JAXB 2.2 API in the classpath");

    73             cl = new URLClassLoader(new URL[]{ParallelWorldClassLoader.toJarUrl(apiUrl)},cl);

    74         }

    76         //Leave XJC2 in the publicly visible place

    77         // and then isolate XJC1 in a child class loader,

    78         // then use a MaskingClassLoader

    79         // so that the XJC2 classes in the parent class loader

    80         //  won't interfere with loading XJC1 classes in a child class loader

    82         if ("1.0".equals(v)) {

    83             if(!mustang)

    84                 // if we haven't used Masking ClassLoader, do so now.

    85                 cl = new MaskingClassLoader(cl,toolPackages);

    86             cl = new ParallelWorldClassLoader(cl,"1.0/");

    87         } else {

    88             if(mustang)

    89                 // the whole RI needs to be loaded in a separate class loader

    90                 cl = new ParallelWorldClassLoader(cl,"");

    91         }

    93         return cl;

    94     }

    97     /**

    98      * The list of package prefixes we want the

    99      * {@link MaskingClassLoader} to prevent the parent

   100      * classLoader from loading

   101      */

   102     private static String[] maskedPackages = new String[]{

   103         // toolPackages + alpha

   104         "com.sun.tools.",

   105         "com.sun.codemodel.internal.",

   106         "com.sun.relaxng.",

   107         "com.sun.xml.internal.xsom.",

   108         "com.sun.xml.internal.bind.",

   109     };

   111     private static String[] toolPackages = new String[]{

   112         "com.sun.tools.",

   113         "com.sun.codemodel.internal.",

   114         "com.sun.relaxng.",

   115         "com.sun.xml.internal.xsom."

   116     };

   118     /**

   119      * Escape hatch in case this class loader hack breaks.

   120      */

   121     public static final boolean noHack = Boolean.getBoolean(XJCFacade.class.getName()+".nohack");

   122 }

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