Class ThreadSafeChunkerME

java.lang.Object

opennlp.tools.chunker.ThreadSafeChunkerME

All Implemented Interfaces:

AutoCloseable, opennlp.tools.chunker.Chunker, opennlp.tools.ml.Probabilistic

@ThreadSafe
public class ThreadSafeChunkerME
extends Object
implements opennlp.tools.chunker.Chunker, opennlp.tools.ml.Probabilistic, AutoCloseable

A thread-safe version of the ChunkerME. Using it is completely transparent. You can use it in a single-threaded context as well, it only incurs a minimal overhead.

Note:
This implementation uses a ThreadLocal. Although the implementation is lightweight because the model is not duplicated, if you have many long-running threads, you may run into memory problems.

Be careful when using this in a Jakarta EE application, for example.

The user is responsible for clearing the ThreadLocal via calling close().

See Also:

• Chunker
• ChunkerME
• Probabilistic

Constructor Summary

Constructors

Constructor	Description
ThreadSafeChunkerME(ChunkerModel model)	Initializes a ThreadSafeChunkerME with the specified model.

Method Summary

Modifier and Type	Method	Description
String[]	chunk(String[] toks, String[] tags)
opennlp.tools.util.Span[]	chunkAsSpans(String[] toks, String[] tags)
void	close()
double[]	probs()
opennlp.tools.util.Sequence[]	topKSequences(String[] sentence, String[] tags)
opennlp.tools.util.Sequence[]	topKSequences(String[] sentence, String[] tags, double minSequenceScore)

Methods inherited from class Object

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

Constructor Details

ThreadSafeChunkerME

public ThreadSafeChunkerME(ChunkerModel model)

Initializes a ThreadSafeChunkerME with the specified model.

Parameters:

model - A valid ChunkerModel.

Method Details

chunk

public String[] chunk(String[] toks,
 String[] tags)

Specified by:

chunk in interface opennlp.tools.chunker.Chunker

chunkAsSpans

public opennlp.tools.util.Span[] chunkAsSpans(String[] toks,
 String[] tags)

Specified by:

chunkAsSpans in interface opennlp.tools.chunker.Chunker

topKSequences

public opennlp.tools.util.Sequence[] topKSequences(String[] sentence,
 String[] tags)

Specified by:

topKSequences in interface opennlp.tools.chunker.Chunker

topKSequences

public opennlp.tools.util.Sequence[] topKSequences(String[] sentence,
 String[] tags,
 double minSequenceScore)

Specified by:

topKSequences in interface opennlp.tools.chunker.Chunker

close

public void close()

Specified by:

close in interface AutoCloseable

probs

public double[] probs()

Specified by:

probs in interface opennlp.tools.ml.Probabilistic