org.apache.cassandra.io.compress
Class CompressionMetadata

java.lang.Object
  org.apache.cassandra.io.compress.CompressionMetadata

public class CompressionMetadata
extends java.lang.Object

Holds metadata about compressed file

Nested Class Summary

class	CompressionMetadata.Chunk Holds offset and length of the file chunk
static class	CompressionMetadata.Writer

Field Summary

long[]	chunkOffsets
long	compressedFileLength
long	dataLength
java.lang.String	indexFilePath
CompressionParameters	parameters

Constructor Summary

CompressionMetadata(java.lang.String indexFilePath, long compressedLength)

Method Summary

CompressionMetadata.Chunk	chunkFor(long position) Get a chunk of compressed data (offset, length) corresponding to given position
int	chunkLength()
ICompressor	compressor()

Methods inherited from class java.lang.Object

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

Field Detail

dataLength

public final long dataLength

compressedFileLength

public final long compressedFileLength

chunkOffsets

public final long[] chunkOffsets

indexFilePath

public final java.lang.String indexFilePath

parameters

public final CompressionParameters parameters

Constructor Detail

CompressionMetadata

public CompressionMetadata(java.lang.String indexFilePath,
                           long compressedLength)
                    throws java.io.IOException

Throws:

java.io.IOException

Method Detail

compressor

public ICompressor compressor()

chunkLength

public int chunkLength()

chunkFor

public CompressionMetadata.Chunk chunkFor(long position)
                                   throws java.io.IOException

Get a chunk of compressed data (offset, length) corresponding to given position

Parameters:

position - Position in the file.

Returns:

pair of chunk offset and length.

Throws:

java.io.IOException - on any I/O error.