/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.tools.xjc;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.xml.bind.JAXBContext;
import com.sun.istack.tools.MaskingClassLoader;
import com.sun.istack.tools.ParallelWorldClassLoader;
/**
* Creates a class loader configured to run XJC 1.0/2.0 safely without
* interference with JAXB 2.0 API in Mustang.
*
* @author Kohsuke Kawaguchi
*/
class ClassLoaderBuilder {
/**
* Creates a new class loader that eventually delegates to the given {@link ClassLoader}
* such that XJC can be loaded by using this classloader.
*
* @param v
* Either "1.0" or "2.0", indicating the version of the -source value.
*/
protected static ClassLoader createProtectiveClassLoader(ClassLoader cl, String v) throws ClassNotFoundException, MalformedURLException {
if(noHack) return cl; // provide an escape hatch
boolean mustang = false;
if(JAXBContext.class.getClassLoader()==null) {
// JAXB API is loaded from the bootstrap. We need to override one with ours
mustang = true;
List mask = new ArrayList(Arrays.asList(maskedPackages));
mask.add("javax.xml.bind.");
cl = new MaskingClassLoader(cl,mask);
URL apiUrl = cl.getResource("javax/xml/bind/JAXBPermission.class");
if(apiUrl==null)
throw new ClassNotFoundException("There's no JAXB 2.2 API in the classpath");
cl = new URLClassLoader(new URL[]{ParallelWorldClassLoader.toJarUrl(apiUrl)},cl);
}
//Leave XJC2 in the publicly visible place
// and then isolate XJC1 in a child class loader,
// then use a MaskingClassLoader
// so that the XJC2 classes in the parent class loader
// won't interfere with loading XJC1 classes in a child class loader
if (v.equals("1.0")) {
if(!mustang)
// if we haven't used Masking ClassLoader, do so now.
cl = new MaskingClassLoader(cl,toolPackages);
cl = new ParallelWorldClassLoader(cl,"1.0/");
} else {
if(mustang)
// the whole RI needs to be loaded in a separate class loader
cl = new ParallelWorldClassLoader(cl,"");
}
return cl;
}
/**
* The list of package prefixes we want the
* {@link MaskingClassLoader} to prevent the parent
* classLoader from loading
*/
private static String[] maskedPackages = new String[]{
// toolPackages + alpha
"com.sun.tools.",
"com.sun.codemodel.",
"com.sun.relaxng.",
"com.sun.xml.xsom.",
"com.sun.xml.bind.",
};
private static String[] toolPackages = new String[]{
"com.sun.tools.",
"com.sun.codemodel.",
"com.sun.relaxng.",
"com.sun.xml.xsom."
};
/**
* Escape hatch in case this class loader hack breaks.
*/
public static final boolean noHack = Boolean.getBoolean(XJCFacade.class.getName()+".nohack");
}