com.thinkberg.webdav.vfs.VFSBackend.java Source code

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Here is the source code for com.thinkberg.webdav.vfs.VFSBackend.java

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/*
 * Copyright 2009 Matthias L. Jugel.
 *
 * Licensed 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 com.thinkberg.webdav.vfs;

import org.apache.commons.vfs.FileObject;
import org.apache.commons.vfs.FileSystemException;
import org.apache.commons.vfs.FileSystemOptions;
import org.apache.commons.vfs.VFS;

/**
 * @author Matthias L. Jugel
 * @version $Id$
 */
public class VFSBackend {
    private static VFSBackend instance;

    private final FileObject fileSystemRoot;

    public static void initialize(String rootUri, FileSystemOptions options) throws FileSystemException {
        if (null == instance) {
            instance = new VFSBackend(rootUri, options);
        }
    }

    private VFSBackend(String rootUri, FileSystemOptions options) throws FileSystemException {
        fileSystemRoot = VFS.getManager().resolveFile(rootUri, options);
    }

    public static FileObject resolveFile(String path) throws FileSystemException {
        if (null == instance) {
            throw new IllegalStateException("VFS backend not initialized");
        }
        return instance.fileSystemRoot.resolveFile(path);
    }
}