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Apache Commons VFS is a Virtual File System library.
/*
* 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.hdfs;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import org.apache.commons.vfs2.Capability;
import org.apache.commons.vfs2.FileName;
import org.apache.commons.vfs2.FileSystem;
import org.apache.commons.vfs2.FileSystemConfigBuilder;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider;
import org.apache.commons.vfs2.provider.http.HttpFileNameParser;
/**
* FileProvider for HDFS files.
*
* @since 2.1
*/
public class HdfsFileProvider extends AbstractOriginatingFileProvider {
static final Collection CAPABILITIES = Collections
.unmodifiableCollection(Arrays.asList(new Capability[] { Capability.GET_TYPE, Capability.READ_CONTENT,
Capability.URI, Capability.GET_LAST_MODIFIED, Capability.ATTRIBUTES, Capability.RANDOM_ACCESS_READ,
Capability.DIRECTORY_READ_CONTENT, Capability.LIST_CHILDREN }));
/**
* Constructs a new HdfsFileProvider.
*/
public HdfsFileProvider() {
super();
this.setFileNameParser(HttpFileNameParser.getInstance());
}
/**
* Create a new HdfsFileSystem instance.
*
* @param rootName Name of the root file.
* @param fileSystemOptions Configuration options for this instance.
* @throws FileSystemException if error occurred.
*/
@Override
protected FileSystem doCreateFileSystem(final FileName rootName, final FileSystemOptions fileSystemOptions)
throws FileSystemException {
return new HdfsFileSystem(rootName, fileSystemOptions);
}
/**
* Get Capabilities of HdfsFileSystem.
*
* @return The capabilities (unmodifiable).
*/
@Override
public Collection getCapabilities() {
return CAPABILITIES;
}
/**
* Return config builder.
*
* @return A config builder for HdfsFileSystems.
* @see org.apache.commons.vfs2.provider.AbstractFileProvider#getConfigBuilder()
*/
@Override
public FileSystemConfigBuilder getConfigBuilder() {
return HdfsFileSystemConfigBuilder.getInstance();
}
}
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