edu.umass.cs.mallet.base.types

Class LabelAlphabet

java.lang.Object

edu.umass.cs.mallet.base.types.Alphabet

edu.umass.cs.mallet.base.types.LabelAlphabet

All Implemented Interfaces:

Serializable

public class LabelAlphabet
extends Alphabet
implements Serializable

A mapping from arbitrary objects (usually String's) to integers (and corresponding Label objects) and back.

Author:

Andrew McCallum mccallum@cs.umass.edu

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LabelAlphabet()

Method Summary

Modifier and Type	Method and Description
int	lookupIndex(Object entry, boolean addIfNotPresent) Return -1 if entry isn't present.
Label	lookupLabel(int labelIndex)
Label	lookupLabel(Object entry)
Label	lookupLabel(Object entry, boolean addIfNotPresent)

Methods inherited from class edu.umass.cs.mallet.base.types.Alphabet

clone, contains, dump, dump, dump, entryClass, getInstanceId, growthStopped, iterator, lookupIndex, lookupIndices, lookupObject, lookupObjects, lookupObjects, readResolve, setInstanceId, size, startGrowth, stopGrowth, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

LabelAlphabet

public LabelAlphabet()

Method Detail

lookupIndex

public int lookupIndex(Object entry,
                       boolean addIfNotPresent)

Description copied from class: Alphabet

Return -1 if entry isn't present.

Overrides:

lookupIndex in class Alphabet

lookupLabel

public Label lookupLabel(Object entry,
                         boolean addIfNotPresent)

lookupLabel

public Label lookupLabel(Object entry)

lookupLabel

public Label lookupLabel(int labelIndex)