Package org.apache.hadoop.fs

Class MD5MD5CRC32FileChecksum

java.lang.Object

org.apache.hadoop.fs.FileChecksum

org.apache.hadoop.fs.MD5MD5CRC32FileChecksum

All Implemented Interfaces:

Writable

Direct Known Subclasses:

MD5MD5CRC32CastagnoliFileChecksum, MD5MD5CRC32GzipFileChecksum

@LimitedPrivate("HDFS")
@Unstable
public class MD5MD5CRC32FileChecksum
extends FileChecksum

MD5 of MD5 of CRC32.

Field Summary

Fields

Modifier and Type	Field	Description
static int	LENGTH

Constructor Summary

Constructors

Constructor	Description
MD5MD5CRC32FileChecksum()	Same as this(0, 0, null)
MD5MD5CRC32FileChecksum(int bytesPerCRC, long crcPerBlock, MD5Hash md5)	Create a MD5FileChecksum.

Method Summary

Modifier and Type	Method	Description
java.lang.String	getAlgorithmName()	The checksum algorithm name.
byte[]	getBytes()	The value of the checksum in bytes.
Options.ChecksumOpt	getChecksumOpt()
DataChecksum.Type	getCrcType()	returns the CRC type.
static DataChecksum.Type	getCrcTypeFromAlgorithmName(java.lang.String algorithm)
int	getLength()	The length of the checksum in bytes.
void	readFields(java.io.DataInput in)	Deserialize the fields of this object from in.
java.lang.String	toString()
void	write(java.io.DataOutput out)	Serialize the fields of this object to out.

Methods inherited from class org.apache.hadoop.fs.FileChecksum

equals, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

LENGTH

public static final int LENGTH

See Also:

Constant Field Values

Constructor Detail

MD5MD5CRC32FileChecksum

public MD5MD5CRC32FileChecksum()

Same as this(0, 0, null)

MD5MD5CRC32FileChecksum

public MD5MD5CRC32FileChecksum(int bytesPerCRC,
                               long crcPerBlock,
                               MD5Hash md5)

Create a MD5FileChecksum.

Parameters:

bytesPerCRC - bytesPerCRC.

crcPerBlock - crcPerBlock.

md5 - md5.

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()

Description copied from class: FileChecksum

The checksum algorithm name.

Specified by:

getAlgorithmName in class FileChecksum

Returns:

algorithm name.

getCrcTypeFromAlgorithmName

public static DataChecksum.Type getCrcTypeFromAlgorithmName(java.lang.String algorithm)
                                                     throws java.io.IOException

Throws:

java.io.IOException

getLength

public int getLength()

Description copied from class: FileChecksum

The length of the checksum in bytes.

Specified by:

getLength in class FileChecksum

Returns:

length.

getBytes

public byte[] getBytes()

Description copied from class: FileChecksum

The value of the checksum in bytes.

Specified by:

getBytes in class FileChecksum

Returns:

byte array.

getCrcType

public DataChecksum.Type getCrcType()

returns the CRC type.

Returns:

data check sum type.

getChecksumOpt

public Options.ChecksumOpt getChecksumOpt()

Overrides:

getChecksumOpt in class FileChecksum

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Parameters:

in - DataInput to deseriablize this object from.

Throws:

java.io.IOException - any other problem for readFields.

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Parameters:

out - DataOuput to serialize this object into.

Throws:

java.io.IOException - any other problem for write.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object