123 lines
4.4 KiB
Java
123 lines
4.4 KiB
Java
/*
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* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.tools.internal.xjc;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import javax.xml.bind.JAXBContext;
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import com.sun.istack.internal.tools.MaskingClassLoader;
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import com.sun.istack.internal.tools.ParallelWorldClassLoader;
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/**
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* Creates a class loader configured to run XJC 1.0/2.0 safely without
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* interference with JAXB 2.0 API in Mustang.
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*
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* @author Kohsuke Kawaguchi
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*/
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class ClassLoaderBuilder {
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/**
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* Creates a new class loader that eventually delegates to the given {@link ClassLoader}
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* such that XJC can be loaded by using this classloader.
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*
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* @param v
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* Either "1.0" or "2.0", indicating the version of the -source value.
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*/
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protected static ClassLoader createProtectiveClassLoader(ClassLoader cl, String v) throws ClassNotFoundException, MalformedURLException {
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if(noHack) return cl; // provide an escape hatch
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boolean mustang = false;
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if (SecureLoader.getClassClassLoader(JAXBContext.class) == null) {
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// JAXB API is loaded from the bootstrap. We need to override one with ours
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mustang = true;
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List<String> mask = new ArrayList<String>(Arrays.asList(maskedPackages));
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mask.add("javax.xml.bind.");
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cl = new MaskingClassLoader(cl,mask);
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URL apiUrl = cl.getResource("javax/xml/bind/JAXBPermission.class");
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if(apiUrl==null)
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throw new ClassNotFoundException("There's no JAXB 2.2 API in the classpath");
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cl = new URLClassLoader(new URL[]{ParallelWorldClassLoader.toJarUrl(apiUrl)},cl);
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}
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//Leave XJC2 in the publicly visible place
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// and then isolate XJC1 in a child class loader,
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// then use a MaskingClassLoader
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// so that the XJC2 classes in the parent class loader
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// won't interfere with loading XJC1 classes in a child class loader
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if ("1.0".equals(v)) {
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if(!mustang)
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// if we haven't used Masking ClassLoader, do so now.
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cl = new MaskingClassLoader(cl,toolPackages);
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cl = new ParallelWorldClassLoader(cl,"1.0/");
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} else {
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if(mustang)
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// the whole RI needs to be loaded in a separate class loader
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cl = new ParallelWorldClassLoader(cl,"");
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}
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return cl;
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}
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/**
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* The list of package prefixes we want the
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* {@link MaskingClassLoader} to prevent the parent
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* classLoader from loading
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*/
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private static String[] maskedPackages = new String[]{
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// toolPackages + alpha
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"com.sun.tools.",
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"com.sun.codemodel.internal.",
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"com.sun.relaxng.",
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"com.sun.xml.internal.xsom.",
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"com.sun.xml.internal.bind.",
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};
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private static String[] toolPackages = new String[]{
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"com.sun.tools.",
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"com.sun.codemodel.internal.",
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"com.sun.relaxng.",
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"com.sun.xml.internal.xsom."
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};
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/**
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* Escape hatch in case this class loader hack breaks.
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*/
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public static final boolean noHack = Boolean.getBoolean(XJCFacade.class.getName()+".nohack");
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}
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