org.apache.orc.impl

Class ZlibCodec

java.lang.Object

org.apache.orc.impl.ZlibCodec

All Implemented Interfaces:

CompressionCodec, DirectDecompressionCodec

public class ZlibCodec
extends Object
implements CompressionCodec, DirectDecompressionCodec

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.orc.CompressionCodec

CompressionCodec.Modifier

Constructor Summary

Constructors

Constructor and Description
ZlibCodec()

Method Summary

Modifier and Type	Method and Description
void	close() Closes the codec, releasing the resources.
boolean	compress(ByteBuffer in, ByteBuffer out, ByteBuffer overflow) Compress the in buffer to the out buffer.
void	decompress(ByteBuffer in, ByteBuffer out) Decompress the in buffer to the out buffer.
void	directDecompress(ByteBuffer in, ByteBuffer out)
boolean	isAvailable()
CompressionCodec	modify(EnumSet<CompressionCodec.Modifier> modifiers) Produce a modified compression codec if the underlying algorithm allows modification.
void	reset() Resets the codec, preparing it for reuse.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ZlibCodec

public ZlibCodec()

Method Detail

compress

public boolean compress(ByteBuffer in,
                        ByteBuffer out,
                        ByteBuffer overflow)
                 throws IOException

Description copied from interface: CompressionCodec

Compress the in buffer to the out buffer.

Specified by:

compress in interface CompressionCodec

Parameters:

in - the bytes to compress

out - the uncompressed bytes

overflow - put any additional bytes here

Returns:

true if the output is smaller than input

Throws:

IOException

decompress

public void decompress(ByteBuffer in,
                       ByteBuffer out)
                throws IOException

Description copied from interface: CompressionCodec

Decompress the in buffer to the out buffer.

Specified by:

decompress in interface CompressionCodec

Parameters:

in - the bytes to decompress

out - the decompressed bytes

Throws:

IOException

isAvailable

public boolean isAvailable()

Specified by:

isAvailable in interface DirectDecompressionCodec

directDecompress

public void directDecompress(ByteBuffer in,
                             ByteBuffer out)
                      throws IOException

Specified by:

directDecompress in interface DirectDecompressionCodec

Throws:

IOException

modify

public CompressionCodec modify(EnumSet<CompressionCodec.Modifier> modifiers)

Description copied from interface: CompressionCodec

Produce a modified compression codec if the underlying algorithm allows modification. This does not modify the current object, but returns a new object if modifications are possible. Returns the same object if no modifications are possible.

Specified by:

modify in interface CompressionCodec

Parameters:

modifiers - compression modifiers (nullable)

Returns:

codec for use after optional modification

reset

public void reset()

Description copied from interface: CompressionCodec

Resets the codec, preparing it for reuse.

Specified by:

reset in interface CompressionCodec

close

public void close()

Description copied from interface: CompressionCodec

Closes the codec, releasing the resources.

Specified by:

close in interface CompressionCodec