package org.webslinger.commons.vfs.virtual;

 import java.util.Collection;

 import org.apache.commons.vfs.FileName;

 import org.apache.commons.vfs.FileObject;

 import org.apache.commons.vfs.FileSystemException;

 import org.webslinger.commons.vfs.handlers.HandlerFactory;

 import org.webslinger.commons.vfs.handlers.cow.COWStorageHandler;

 import org.webslinger.commons.vfs.handlers.cow.COWStateXmlStorageHandler;

 public class VirtualCOWStateXmlStorageHandlerFactory implements HandlerFactory<COWStorageHandler, VirtualFileSystem> {

     protected final String stateName;

     public VirtualCOWStateXmlStorageHandlerFactory() {

         this(".cowstate.xml");

     }

     public VirtualCOWStateXmlStorageHandlerFactory(String stateName) {

         this.stateName = stateName;

     }

     public COWStorageHandler getHandler(final VirtualFileSystem fs, Class<COWStorageHandler> handlerClass) throws FileSystemException {

         return new COWStateXmlStorageHandler() {

             public FileObject getFile(FileName dir) throws FileSystemException {

                 return fs.findMounted(dir, stateName);

             }

             public void excludeNames(Collection<String> names) {

                 names.remove(stateName);

             }

         };

     }

 }