org.teiid.internal.core.index
Class GammaCompressedIndexBlock

java.lang.Object
  org.teiid.internal.core.index.Block
      org.teiid.internal.core.index.IndexBlock
          org.teiid.internal.core.index.GammaCompressedIndexBlock

public class GammaCompressedIndexBlock
extends IndexBlock

Uses prefix coding on words, and gamma coding of document numbers differences.

Field Summary

Fields inherited from class org.teiid.internal.core.index.Block

blockSize, field

Constructor Summary

GammaCompressedIndexBlock(int blockSize)

Method Summary

boolean	addEntry(WordEntry entry) Adds the given wordEntry to the indexBlock.
protected void	encodeEntry(WordEntry entry, char[] prevWord, CodeByteStream codeStream)
void	flush() Flushes the block
boolean	isEmpty() Returns whether the block is empty or not (if it doesn't contain any wordEntry).
boolean	nextEntry(WordEntry entry) Finds the next wordEntry and stores it in the given entry.
void	reset()

Methods inherited from class org.teiid.internal.core.index.IndexBlock

clear, findEntryPrefixedBy, findExactEntry

Methods inherited from class org.teiid.internal.core.index.Block

read, write

Methods inherited from class java.lang.Object

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

Constructor Detail

GammaCompressedIndexBlock

public GammaCompressedIndexBlock(int blockSize)

Method Detail

addEntry

public boolean addEntry(WordEntry entry)

Description copied from class: IndexBlock

Adds the given wordEntry to the indexBlock.

Specified by:

addEntry in class IndexBlock

See Also:

IndexBlock.addEntry(org.teiid.internal.core.index.WordEntry)

encodeEntry

protected void encodeEntry(WordEntry entry,
                           char[] prevWord,
                           CodeByteStream codeStream)

flush

public void flush()

Description copied from class: Block

Flushes the block

Overrides:

flush in class Block

See Also:

Block.flush()

isEmpty

public boolean isEmpty()

Description copied from class: IndexBlock

Returns whether the block is empty or not (if it doesn't contain any wordEntry).

Specified by:

isEmpty in class IndexBlock

See Also:

IndexBlock.isEmpty()

nextEntry

public boolean nextEntry(WordEntry entry)

Description copied from class: IndexBlock

Finds the next wordEntry and stores it in the given entry.

Specified by:

nextEntry in class IndexBlock

See Also:

IndexBlock.nextEntry(org.teiid.internal.core.index.WordEntry)

reset

public void reset()

Overrides:

reset in class IndexBlock

See Also:

IndexBlock.reset()