Java tutorial
/* * JBoss, Home of Professional Open Source. * Copyright 2008, Red Hat Middleware LLC, 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.spring.vfs; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.net.URL; import org.springframework.core.io.AbstractResource; import org.springframework.core.io.DefaultResourceLoader; import org.springframework.core.io.Resource; import org.springframework.util.Assert; /** * VFS based ResourceLoader. * * @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a> * @author <a href="mailto:mariusb@redhat.com">Marius Bogoevici</a> */ public class VFSResourceLoader extends DefaultResourceLoader { public VFSResourceLoader(ClassLoader classLoader) { super(classLoader); } public Resource getResource(String location) { Assert.notNull(location, "Location must not be null"); if (location.startsWith(CLASSPATH_URL_PREFIX)) { return doGetResourceForLocation(location.substring(CLASSPATH_URL_PREFIX.length())); } else { return super.getResource(location); } } protected Resource getResourceByPath(String path) { return doGetResourceForLocation(path); } private Resource doGetResourceForLocation(String path) { URL url = getClassLoader().getResource(path); if (url != null) { return new VFSResource(url); } else { return new InexistentResource(path); } } /* A special type of resource, for the case when the resource does not exit */ private static class InexistentResource extends AbstractResource { private final String path; private InexistentResource(String path) { this.path = path; } public String getDescription() { return null; } public InputStream getInputStream() throws IOException { throw new FileNotFoundException("Resource does not exist for path " + path); } public boolean exists() { return false; } } }