edu.umass.cs.mallet.base.pipe

Class TargetRememberLastLabel

java.lang.Object

edu.umass.cs.mallet.base.pipe.Pipe

edu.umass.cs.mallet.base.pipe.TargetRememberLastLabel

All Implemented Interfaces:

Serializable

public class TargetRememberLastLabel
extends Pipe

For each position in the target, remember the last non-background label. Assumes that the target of piped instances is a LabelSequence. Replaces the target with a LabelsSequence where row 0 is the original labels, and row 1 is the last label.

Version:

$Id: TargetRememberLastLabel.java,v 1.2 2004/04/17 21:55:17 casutton Exp $

Author:

Charles Sutton

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TargetRememberLastLabel()
TargetRememberLastLabel(String backgroundLabel, boolean offset) offset determines how the memory and base sequences will be aligned.

Method Summary

Modifier and Type	Method and Description
Instance	pipe(Instance carrier) Process an Instance.

Methods inherited from class edu.umass.cs.mallet.base.pipe.Pipe

getDataAlphabet, getInstanceId, getParent, getParentRoot, getTargetAlphabet, isDataAlphabetSet, isTargetProcessing, pipe, readResolve, resolveDataAlphabet, resolveTargetAlphabet, setDataAlphabet, setParent, setTargetAlphabet, setTargetProcessing

Methods inherited from class java.lang.Object

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

Constructor Detail

TargetRememberLastLabel

public TargetRememberLastLabel()

TargetRememberLastLabel

public TargetRememberLastLabel(String backgroundLabel,
                               boolean offset)

offset determines how the memory and base sequences will be aligned. If true, they'll be aligned like this:

  MEM   O  O  S  S  S  E  L
  BASE  O  S  S  O  E  L  O
 

otherwise, they'll be aligned like this:

  MEM   O  S  S  S  E  E  L
  BASE  O  S  S  O  E  L  O
 

Method Detail

pipe

public Instance pipe(Instance carrier)

Description copied from class: Pipe

Process an Instance. This method takes an input Instance, destructively modifies it in some way, and returns it. This is the method by which all pipes are eventually run.

One can create a new concrete subclass of Pipe simply by implementing this method.

Specified by:

pipe in class Pipe

Parameters:

carrier - Instance to be processed.