org.apache.avro.file

Class DeflateCodec

java.lang.Object

org.apache.avro.file.Codec

org.apache.avro.file.DeflateCodec

public class DeflateCodec
extends Codec

Implements DEFLATE (RFC1951) compression and decompression. Note that there is a distinction between RFC1951 (deflate) and RFC1950 (zlib). zlib adds an extra 2-byte header at the front, and a 4-byte checksum at the end. The code here, by passing "true" as the "nowrap" option to Inflater and Deflater, is using RFC1951.

Constructor Summary

Constructors

Constructor and Description
DeflateCodec(int compressionLevel)

Method Summary

Modifier and Type	Method and Description
ByteBuffer	compress(ByteBuffer data) Compresses the input data
ByteBuffer	decompress(ByteBuffer data) Decompress the data
boolean	equals(Object obj) Codecs must implement an equals() method.
String	getName() Name of the codec; written to the file's metadata.
int	hashCode() Codecs must implement a hashCode() method that is consistent with equals().
String	toString()

Methods inherited from class org.apache.avro.file.Codec

computeOffset

Methods inherited from class java.lang.Object

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

Constructor Detail

DeflateCodec

public DeflateCodec(int compressionLevel)

Method Detail

getName

public String getName()

Description copied from class: Codec

Name of the codec; written to the file's metadata.

Specified by:

getName in class Codec

compress

public ByteBuffer compress(ByteBuffer data)
                    throws IOException

Description copied from class: Codec

Compresses the input data

Specified by:

compress in class Codec

Throws:

IOException

decompress

public ByteBuffer decompress(ByteBuffer data)
                      throws IOException

Description copied from class: Codec

Decompress the data

Specified by:

decompress in class Codec

Throws:

IOException

hashCode

public int hashCode()

Description copied from class: Codec

Codecs must implement a hashCode() method that is consistent with equals().

Specified by:

hashCode in class Codec

equals

public boolean equals(Object obj)

Description copied from class: Codec

Codecs must implement an equals() method. Two codecs, A and B are equal if: the result of A and B decompressing content compressed by A is the same AND the result of A and B decompressing content compressed by B is the same

Specified by:

equals in class Codec

toString

public String toString()

Overrides:

toString in class Codec