/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.modules;
import java.net.ContentHandler;
import java.net.ContentHandlerFactory;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.List;
import java.util.ServiceLoader;
import java.util.concurrent.CopyOnWriteArrayList;
/**
* @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
*/
final class ModularContentHandlerFactory implements ContentHandlerFactory {
private static final PrivilegedAction<String> CONTENT_MODULES_LIST_ACTION = new PropertyReadAction("jboss.content.handler.modules");
private static final List<Module> modules;
static {
CopyOnWriteArrayList<Module> list = new CopyOnWriteArrayList<Module>();
final SecurityManager sm = System.getSecurityManager();
final String urlModulesList;
if (sm != null) {
urlModulesList = AccessController.doPrivileged(CONTENT_MODULES_LIST_ACTION);
} else {
urlModulesList = CONTENT_MODULES_LIST_ACTION.run();
}
if (urlModulesList != null) {
final List<Module> moduleList = new ArrayList<Module>();
int f = 0;
int i;
do {
i = urlModulesList.indexOf('|', f);
final String moduleId = (i == -1 ? urlModulesList.substring(f) : urlModulesList.substring(f, i)).trim();
if (moduleId.length() > 0) {
try {
final ModuleIdentifier identifier = ModuleIdentifier.fromString(moduleId);
Module module = Module.getBootModuleLoader().loadModule(identifier);
moduleList.add(module);
} catch (RuntimeException e) {
// skip it
} catch (ModuleLoadException e) {
// skip it
}
}
f = i + 1;
} while (i != -1);
list.addAll(moduleList);
}
modules = list;
}
static final ModularContentHandlerFactory INSTANCE = new ModularContentHandlerFactory();
static void addHandlerModule(Module module) {
modules.add(module);
}
public ContentHandler createContentHandler(final String mimeType) {
for (Module module : modules) {
ServiceLoader<ContentHandlerFactory> loader = module.loadService(ContentHandlerFactory.class);
for (ContentHandlerFactory factory : loader) try {
final ContentHandler handler = factory.createContentHandler(mimeType);
if (handler != null) {
return handler;
}
} catch (RuntimeException e) {
// ignored
}
}
return null;
}
}