edu.umass.cs.mallet.base.pipe

Class CharSequence2CharNGrams

java.lang.Object

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

edu.umass.cs.mallet.base.pipe.CharSequence2CharNGrams

All Implemented Interfaces:

Serializable

public class CharSequence2CharNGrams
extends Pipe
implements Serializable

Transform a character sequence into a token sequence of character N grams.

Author:

Andrew McCallum mccallum@cs.umass.edu

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CharSequence2CharNGrams(int n, boolean distinguishBorders)

Method Summary

Modifier and Type	Method and Description
protected String[]	ngramify(CharSequence s)
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

CharSequence2CharNGrams

public CharSequence2CharNGrams(int n,
                               boolean distinguishBorders)

Method Detail

ngramify

protected String[] ngramify(CharSequence s)

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.