opennlp.tools.postag

Class DefaultPOSContextGenerator

java.lang.Object

opennlp.tools.postag.DefaultPOSContextGenerator

All Implemented Interfaces:

POSContextGenerator, BeamSearchContextGenerator<java.lang.String>

public class DefaultPOSContextGenerator
extends java.lang.Object
implements POSContextGenerator

A context generator for the POS Tagger.

Constructor Summary

Constructors

Constructor and Description
DefaultPOSContextGenerator(Dictionary dict) Initializes the current instance.
DefaultPOSContextGenerator(int cacheSize, Dictionary dict) Initializes the current instance.

Method Summary

Modifier and Type	Method and Description
java.lang.String[]	getContext(int index, java.lang.Object[] tokens, java.lang.String[] tags) Returns the context for making a pos tag decision at the specified token index given the specified tokens and previous tags.
java.lang.String[]	getContext(int index, java.lang.String[] sequence, java.lang.String[] priorDecisions, java.lang.Object[] additionalContext) Returns the context for the specified position in the specified sequence (list).

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultPOSContextGenerator

public DefaultPOSContextGenerator(Dictionary dict)

Initializes the current instance.

Parameters:

dict -

DefaultPOSContextGenerator

public DefaultPOSContextGenerator(int cacheSize,
                                  Dictionary dict)

Initializes the current instance.

Parameters:

cacheSize -

dict -

Method Detail

getContext

public java.lang.String[] getContext(int index,
                                     java.lang.String[] sequence,
                                     java.lang.String[] priorDecisions,
                                     java.lang.Object[] additionalContext)

Description copied from interface: BeamSearchContextGenerator

Returns the context for the specified position in the specified sequence (list).

Specified by:

getContext in interface POSContextGenerator

Specified by:

getContext in interface BeamSearchContextGenerator<java.lang.String>

Parameters:

index - The index of the sequence.

sequence - The sequence of items over which the beam search is performed.

priorDecisions - The sequence of decisions made prior to the context for which this decision is being made.

additionalContext - Any addition context specific to a class implementing this interface.

Returns:

the context for the specified position in the specified sequence.

getContext

public java.lang.String[] getContext(int index,
                                     java.lang.Object[] tokens,
                                     java.lang.String[] tags)

Returns the context for making a pos tag decision at the specified token index given the specified tokens and previous tags.

Parameters:

index - The index of the token for which the context is provided.

tokens - The tokens in the sentence.

tags - The tags assigned to the previous words in the sentence.

Returns:

The context for making a pos tag decision at the specified token index given the specified tokens and previous tags.