VFS-2.0-RC1/sandbox/src/main/java/org/apache/commons/vfs/provider/mime/MimeFileProvider.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.vfs.provider.mime;

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.FileType;
import org.apache.commons.vfs.provider.AbstractLayeredFileProvider;
import org.apache.commons.vfs.provider.FileProvider;
import org.apache.commons.vfs.provider.LayeredFileName;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;

/**
 * A provider for MIME Message.
 *
 * @author <a href="mailto:imario@apache.org">imario@apache.org</a>
 * @version $Revision$ $Date$
 */
public class MimeFileProvider
    extends AbstractLayeredFileProvider
    implements FileProvider
{
    protected final static Collection capabilities = Collections.unmodifiableCollection(Arrays.asList(new Capability[]
    {
        Capability.GET_TYPE,
        Capability.GET_LAST_MODIFIED,
        Capability.LIST_CHILDREN,
        Capability.READ_CONTENT,
        Capability.URI,
        Capability.ATTRIBUTES
    }));

    public MimeFileProvider()
    {
        super();
    }

    /**
     * Creates the filesystem.
     */
    protected FileSystem doCreateFileSystem(String scheme, final FileObject file, final FileSystemOptions fileSystemOptions)
        throws FileSystemException
    {
        final FileName name =
            new LayeredFileName(scheme, file.getName(), FileName.ROOT_PATH, FileType.FOLDER);
        return new MimeFileSystem(name, file, fileSystemOptions);
    }

    public Collection getCapabilities()
    {
        return capabilities;
    }
}