/**
* Copyright (C) 2009 eXo Platform SAS.
*
* 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.exoplatform.portal.resource;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;
import javax.servlet.ServletContext;
import org.gatein.common.logging.Logger;
import org.gatein.common.logging.LoggerFactory;
/**
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
* @version $Revision$
*/
public class MainResourceResolver implements ResourceResolver {
/** . */
final Map<String, SimpleResourceContext> contexts;
/** . */
final CopyOnWriteArrayList<ResourceResolver> resolvers;
/** . */
private final Logger log = LoggerFactory.getLogger(MainResourceResolver.class);
public MainResourceResolver() {
this.contexts = new HashMap<String, SimpleResourceContext>();
this.resolvers = new CopyOnWriteArrayList<ResourceResolver>();
}
/**
* Register a servlet request context
* <p>
* Append a servlet context to the map of contexts if servlet context name is not existing
*
* @param servletContext servlet context which want to append
* @return
*/
SimpleResourceContext registerContext(ServletContext servletContext) {
String key = "/" + servletContext.getServletContextName();
SimpleResourceContext ctx = contexts.get(key);
if (ctx == null) {
ctx = new SimpleResourceContext(key, servletContext);
contexts.put(ctx.getContextPath(), ctx);
}
return ctx;
}
/**
* Remove a servlet context from map of contexts
*
* @param servletContext
*/
public void removeServletContext(ServletContext servletContext) {
String key = "/" + servletContext.getServletContextName();
SimpleResourceContext ctx = contexts.get(key);
if (ctx != null) {
contexts.remove(ctx.getContextPath());
} else {
log.warn("Cannot find servlet context module");
return;
}
}
public Resource resolve(String path) {
if (path == null) {
throw new NullPointerException("No null path is accepted");
}
//
for (ResourceResolver resolver : resolvers) {
Resource res = resolver.resolve(path);
if (res != null) {
return res;
}
}
//
int i1 = path.indexOf("/", 2);
if (i1 == -1) {
throw new AssertionError();
}
String targetedContextPath = path.substring(0, i1);
SimpleResourceContext context = contexts.get(targetedContextPath);
//
if (context == null) {
log.warn("Could not resolve " + targetedContextPath + " resource for path " + path);
return null;
} else {
return context.getResource(path.substring(i1));
}
}
}