Package org.apache.commons.vfs2.provider.http

Source Code of org.apache.commons.vfs2.provider.http.HttpFileSystem

/*
* 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.vfs2.provider.http;

import java.util.Collection;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpConnectionManager;
import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
import org.apache.commons.vfs2.Capability;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystem;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.provider.AbstractFileName;
import org.apache.commons.vfs2.provider.AbstractFileSystem;
import org.apache.commons.vfs2.provider.GenericFileName;

/**
* An HTTP file system.
*
* @author <a href="http://commons.apache.org/vfs/team-list.html">Commons VFS team</a>
* @version $Revision: 1040766 $ $Date: 2010-12-01 02:06:53 +0530 (Wed, 01 Dec 2010) $
*/
public class HttpFileSystem
    extends AbstractFileSystem
    implements FileSystem
{
    private final HttpClient client;

    protected HttpFileSystem(final GenericFileName rootName, final HttpClient client,
                             final FileSystemOptions fileSystemOptions)
    {
        super(rootName, null, fileSystemOptions);
        this.client = client;
    }

    /**
     * Adds the capabilities of this file system.
     */
    @Override
    protected void addCapabilities(final Collection<Capability> caps)
    {
        caps.addAll(HttpFileProvider.capabilities);
    }

    protected HttpClient getClient()
    {
        return client;
    }

    /** @since 2.0 */
    @Override
    public void closeCommunicationLink()
    {
        if (getClient() != null)
        {
            HttpConnectionManager mgr = getClient().getHttpConnectionManager();
            if (mgr instanceof MultiThreadedHttpConnectionManager)
            {
                ((MultiThreadedHttpConnectionManager) mgr).shutdown();
            }
        }
    }

    /**
     * Creates a file object.  This method is called only if the requested
     * file is not cached.
     */
    @Override
    protected FileObject createFile(final AbstractFileName name)
        throws Exception
    {
        return new HttpFileObject(name, this);
    }
}
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