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

@InterfaceAudience.LimitedPrivate(value="HDFS")
@InterfaceStability.Unstable
public class MD5MD5CRC32FileChecksum
extends FileChecksum

MD5 of MD5 of CRC32.

Field Summary

Fields

Modifier and Type	Field and Description
static int	LENGTH

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
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(String algorithm)
int	getLength() The length of the checksum in bytes
void	readFields(DataInput in) Deserialize the fields of this object from in.
String	toString()
static MD5MD5CRC32FileChecksum	valueOf(Attributes attrs) Return the object represented in the attributes.
void	write(DataOutput out) Serialize the fields of this object to out.
static void	write(org.znerd.xmlenc.XMLOutputter xml, MD5MD5CRC32FileChecksum that) Write that object to xml output.

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

Method Detail

getAlgorithmName

public String getAlgorithmName()

Description copied from class: FileChecksum

The checksum algorithm name

Specified by:

getAlgorithmName in class FileChecksum

getCrcTypeFromAlgorithmName

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

Throws:

IOException

getLength

public int getLength()

Description copied from class: FileChecksum

The length of the checksum in bytes

Specified by:

getLength in class FileChecksum

getBytes

public byte[] getBytes()

Description copied from class: FileChecksum

The value of the checksum in bytes

Specified by:

getBytes in class FileChecksum

getCrcType

public DataChecksum.Type getCrcType()

returns the CRC type

getChecksumOpt

public Options.ChecksumOpt getChecksumOpt()

readFields

public void readFields(DataInput in)
                throws 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:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

write

public static void write(org.znerd.xmlenc.XMLOutputter xml,
         MD5MD5CRC32FileChecksum that)
                  throws IOException

Write that object to xml output.

Throws:

IOException

valueOf

public static MD5MD5CRC32FileChecksum valueOf(Attributes attrs)
                                       throws SAXException

Return the object represented in the attributes.

Throws:

SAXException

toString

public String toString()

Overrides:

toString in class Object