/*
* 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.io;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Enumeration;
import org.jboss.logging.Logger;
import org.jboss.virtual.VFS;
import org.jboss.virtual.VirtualFile;
import org.jboss.virtual.VirtualFileVisitor;
import org.jboss.virtual.VisitorAttributes;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
/**
* VFS based ResourcePatternResolver.
*
* @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a>
*/
public class VFSResourcePatternResolver extends PathMatchingResourcePatternResolver
{
private Logger log = Logger.getLogger(VFSResourcePatternResolver.class);
public VFSResourcePatternResolver()
{
super(new VFSResourceLoader());
}
public VFSResourcePatternResolver(ClassLoader classLoader)
{
super(new VFSResourceLoader(classLoader));
}
protected Resource[] findPathMatchingResources(String locationPattern) throws IOException
{
if (locationPattern.startsWith(CLASSPATH_ALL_URL_PREFIX))
locationPattern = locationPattern.substring(CLASSPATH_ALL_URL_PREFIX.length());
String rootDirPath = determineRootDir(locationPattern);
String subPattern = locationPattern.substring(rootDirPath.length());
if (rootDirPath.startsWith("/"))
rootDirPath = rootDirPath.substring(1);
List<Resource> resources = new ArrayList<Resource>();
Enumeration<URL> urls = getClassLoader().getResources(rootDirPath);
while(urls.hasMoreElements())
resources.addAll(getVFSResources(urls.nextElement(), subPattern));
return resources.toArray(new Resource[resources.size()]);
}
/**
* Get VFS resources.
*
* @param rootURL the root URL
* @param subPattern the sub pattern
* @return vfs resources list
* @throws IOException for any error
*/
protected List<Resource> getVFSResources(URL rootURL, String subPattern) throws IOException
{
log.debug("Scanning url: " + rootURL + ", sub-pattern: " + subPattern);
VirtualFile root = VFS.getRoot(rootURL);
PatternVirtualFileVisitor visitor = new PatternVirtualFileVisitor(subPattern);
root.visit(visitor);
if (log.isTraceEnabled())
log.trace("Found resources: " + visitor);
return visitor.getResources();
}
protected Resource convertClassLoaderURL(URL url)
{
try
{
VirtualFile file = VFS.getRoot(url);
return new VFSResource(file);
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
/**
* Get visitor attributes.
* Allows for override, if necessary.
*
* @return visitor attributes
*/
protected VisitorAttributes getVisitorAttributes()
{
return VisitorAttributes.RECURSE_LEAVES_ONLY;
}
private class PatternVirtualFileVisitor implements VirtualFileVisitor
{
private String subPattern;
private List<Resource> resources = new ArrayList<Resource>();
private PatternVirtualFileVisitor(String subPattern)
{
this.subPattern = subPattern;
}
public VisitorAttributes getAttributes()
{
return getVisitorAttributes();
}
public void visit(VirtualFile vf)
{
if (getPathMatcher().match(subPattern, vf.getPathName()))
resources.add(new VFSResource(vf));
}
public List<Resource> getResources()
{
return resources;
}
public int size()
{
return resources.size();
}
public String toString()
{
StringBuffer buffer = new StringBuffer();
buffer.append("sub-pattern: ").append(subPattern);
buffer.append(", resources: ").append(resources);
return buffer.toString();
}
}
}