package org.webslinger.commons.vfs;

 import java.util.Arrays;

 import java.util.Collection;

 import java.util.Collections;

 import org.apache.commons.vfs.Capability;

 import org.apache.commons.vfs.FileName;

 import org.apache.commons.vfs.FileObject;

 import org.apache.commons.vfs.FileSystem;

 import org.apache.commons.vfs.FileSystemException;

 import org.apache.commons.vfs.FileSystemOptions;

 import org.apache.commons.vfs.provider.LayeredFileName;

 import org.apache.commons.vfs.provider.AbstractLayeredFileProvider;

 public abstract class FilteringFileProvider extends AbstractLayeredFileProvider {

     public final static Collection capabilities = Collections.unmodifiableCollection(

         Arrays.asList(

             new Capability[] {

                 Capability.DISPATCHER

             }

         )

     );

     // this is specific to each wrapped base

     public Collection getCapabilities() {

         return capabilities;

     }

     protected FileSystem doCreateFileSystem(String scheme, FileObject file, FileSystemOptions properties) throws FileSystemException {

         return doCreateFileSystem(new LayeredFileName(scheme, file.getName(), FileName.ROOT_PATH, file.getType()), file, properties);

     }

     protected abstract FileSystem doCreateFileSystem(LayeredFileName name, FileObject file, FileSystemOptions properties) throws FileSystemException;

 }