opennlp.tools.chunker

Class ChunkerEvaluator

java.lang.Object

opennlp.tools.util.eval.Evaluator<ChunkSample>

opennlp.tools.chunker.ChunkerEvaluator

public class ChunkerEvaluator
extends Evaluator<ChunkSample>

The ChunkerEvaluator measures the performance of the given Chunker with the provided reference ChunkSamples.

See Also:

Evaluator, Chunker, ChunkSample

Constructor Summary

Constructors

Constructor and Description
ChunkerEvaluator(Chunker chunker, ChunkerEvaluationMonitor... listeners) Initializes the current instance with the given Chunker.

Method Summary

Modifier and Type	Method and Description
FMeasure	getFMeasure()
protected ChunkSample	processSample(ChunkSample reference) Evaluates the given reference ChunkSample object.

Methods inherited from class opennlp.tools.util.eval.Evaluator

evaluate, evaluateSample

Methods inherited from class java.lang.Object

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

Constructor Detail

ChunkerEvaluator

public ChunkerEvaluator(Chunker chunker,
                        ChunkerEvaluationMonitor... listeners)

Initializes the current instance with the given Chunker.

Parameters:

chunker - the Chunker to evaluate.

listeners - evaluation listeners

Method Detail

processSample

protected ChunkSample processSample(ChunkSample reference)

Evaluates the given reference ChunkSample object. This is done by finding the phrases with the Chunker in the sentence from the reference ChunkSample. The found phrases are then used to calculate and update the scores.

Overrides:

processSample in class Evaluator<ChunkSample>

Parameters:

reference - the reference ChunkSample.

Returns:

the predicted sample

getFMeasure

public FMeasure getFMeasure()