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/**
* 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.hadoop.fs;
import java.io.IOException;
import java.util.Set;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.permission.FsPermission;
/**
* This class defines a FileStatus that includes a file's block locations.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class LocatedFileStatus extends FileStatus {
private static final long serialVersionUID = 0x17339920;
private BlockLocation[] locations;
public LocatedFileStatus() {
super();
}
/**
* Constructor
* @param stat a file status
* @param locations a file's block locations
*/
public LocatedFileStatus(FileStatus stat, BlockLocation[] locations) {
this(stat.getLen(), stat.isDirectory(), stat.getReplication(),
stat.getBlockSize(), stat.getModificationTime(),
stat.getAccessTime(), stat.getPermission(),
stat.getOwner(), stat.getGroup(), null, stat.getPath(),
stat.hasAcl(), stat.isEncrypted(), stat.isErasureCoded(), locations);
if (stat.isSymlink()) {
try {
setSymlink(stat.getSymlink());
} catch (IOException e) {
throw new RuntimeException("Unexpected exception", e);
}
}
}
/**
* Constructor
*
* @param length a file's length
* @param isdir if the path is a directory
* @param block_replication the file's replication factor
* @param blocksize a file's block size
* @param modification_time a file's modification time
* @param access_time a file's access time
* @param permission a file's permission
* @param owner a file's owner
* @param group a file's group
* @param symlink symlink if the path is a symbolic link
* @param path the path's qualified name
* @param locations a file's block locations
*/
@Deprecated
public LocatedFileStatus(long length, boolean isdir,
int block_replication,
long blocksize, long modification_time, long access_time,
FsPermission permission, String owner, String group,
Path symlink, Path path, BlockLocation[] locations) {
this(length, isdir, block_replication, blocksize, modification_time,
access_time, permission, owner, group, symlink, path,
permission == null ? false : permission.getAclBit(),
permission == null ? false : permission.getEncryptedBit(),
permission == null ? false : permission.getErasureCodedBit(),
locations);
}
/**
* Constructor.
*
* @param length a file's length
* @param isdir if the path is a directory
* @param block_replication the file's replication factor
* @param blocksize a file's block size
* @param modification_time a file's modification time
* @param access_time a file's access time
* @param permission a file's permission
* @param owner a file's owner
* @param group a file's group
* @param symlink symlink if the path is a symbolic link
* @param path the path's qualified name
* @param hasAcl entity has associated ACLs
* @param isEncrypted entity is encrypted
* @param isErasureCoded entity is erasure coded
* @param locations a file's block locations
*/
public LocatedFileStatus(long length, boolean isdir,
int block_replication, long blocksize, long modification_time,
long access_time, FsPermission permission, String owner, String group,
Path symlink, Path path,
boolean hasAcl, boolean isEncrypted, boolean isErasureCoded,
BlockLocation[] locations) {
this(length, isdir, block_replication, blocksize, modification_time,
access_time, permission, owner, group, symlink, path,
attributes(hasAcl, isEncrypted, isErasureCoded, false), locations);
this.locations = locations;
}
/**
* Constructor.
*
* @param length a file's length
* @param isdir if the path is a directory
* @param block_replication the file's replication factor
* @param blocksize a file's block size
* @param modification_time a file's modification time
* @param access_time a file's access time
* @param permission a file's permission
* @param owner a file's owner
* @param group a file's group
* @param symlink symlink if the path is a symbolic link
* @param path the path's qualified name
* @param attr Attribute flags (See {@link FileStatus.AttrFlags}).
* @param locations a file's block locations
*/
public LocatedFileStatus(long length, boolean isdir, int block_replication,
long blocksize, long modification_time, long access_time,
FsPermission permission, String owner, String group, Path symlink,
Path path, Set attr, BlockLocation[] locations) {
super(length, isdir, block_replication, blocksize, modification_time,
access_time, permission, owner, group, symlink, path, attr);
this.locations = locations;
}
/**
* Get the file's block locations
*
* In HDFS, the returned BlockLocation will have different formats for
* replicated and erasure coded file.
* Please refer to
* {@link FileSystem#getFileBlockLocations(FileStatus, long, long)}
* for more details.
*
* @return the file's block locations
*/
public BlockLocation[] getBlockLocations() {
return locations;
}
/**
* Hook for subclasses to lazily set block locations. The {@link #locations}
* field should be null before this is called.
* @param locations Block locations for this instance.
*/
protected void setBlockLocations(BlockLocation[] locations) {
this.locations = locations;
}
/**
* Compare this FileStatus to another FileStatus
* @param o the FileStatus to be compared.
* @return a negative integer, zero, or a positive integer as this object
* is less than, equal to, or greater than the specified object.
*/
@Override
public int compareTo(FileStatus o) {
return super.compareTo(o);
}
/** Compare if this object is equal to another object
* @param o the object to be compared.
* @return true if two file status has the same path name; false if not.
*/
@Override
public boolean equals(Object o) {
return super.equals(o);
}
/**
* Returns a hash code value for the object, which is defined as
* the hash code of the path name.
*
* @return a hash code value for the path name.
*/
@Override
public int hashCode() {
return super.hashCode();
}
}
