it.unimi.di.mg4j.document
Class SimpleCompressedDocumentCollection.FrequencyCodec

java.lang.Object
  it.unimi.di.mg4j.document.SimpleCompressedDocumentCollection.FrequencyCodec

Enclosing class:

SimpleCompressedDocumentCollection

protected static class SimpleCompressedDocumentCollection.FrequencyCodec
extends Object

A simple codec for integers that remaps frequent numbers to smaller numbers.

Constructor Summary

SimpleCompressedDocumentCollection.FrequencyCodec()

Method Summary

int	decode(int symbol) Decodes a symbol, returning the original symbol.
int	encode(int symbol) Encodes a symbol, returning a (hopefully smaller) symbol.
void	reset() Empties the queue and the symbol-to-position map.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleCompressedDocumentCollection.FrequencyCodec

public SimpleCompressedDocumentCollection.FrequencyCodec()

Method Detail

reset

public void reset()

Empties the queue and the symbol-to-position map.

encode

public int encode(int symbol)

Encodes a symbol, returning a (hopefully smaller) symbol.

Parameters:

symbol - the input symbol.

Returns:

the output symbol.

decode

public int decode(int symbol)

Decodes a symbol, returning the original symbol.

Parameters:

symbol - a symbol an encoded file.

Returns:

the corresponding original input symbol.