edu.umass.cs.mallet.base.pipe

Class CharSubsequence

java.lang.Object

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

edu.umass.cs.mallet.base.pipe.CharSubsequence

All Implemented Interfaces:

Serializable

public class CharSubsequence
extends Pipe
implements Serializable

Given a string, return only the portion of the string inside a regex parenthesized group.

Author:

Andrew McCallum mccallum@cs.umass.edu

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static Pattern	SKIP_HEADER

Constructor Summary

Constructors

Constructor and Description
CharSubsequence(Pattern regex)
CharSubsequence(Pattern regex, int groupIndex)

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

Field Detail

SKIP_HEADER

public static final Pattern SKIP_HEADER

Constructor Detail

CharSubsequence

public CharSubsequence(Pattern regex,
                       int groupIndex)

CharSubsequence

public CharSubsequence(Pattern regex)

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.