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java.lang.Objectopennlp.tools.chunker.DefaultChunkerContextGenerator
public class DefaultChunkerContextGenerator
Features based on chunking model described in Fei Sha and Fernando Pereira. Shallow parsing with conditional random fields. In Proceedings of HLT-NAACL 2003. Association for Computational Linguistics, 2003.
| Constructor Summary | |
|---|---|
DefaultChunkerContextGenerator()
Creates the default context generator a chunker. |
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| Method Summary | |
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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). |
java.lang.String[] |
getContext(int i,
java.lang.String[] toks,
java.lang.String[] tags,
java.lang.String[] preds)
Returns the contexts for chunking of the specified index. |
| Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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public DefaultChunkerContextGenerator()
| Method Detail |
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public java.lang.String[] getContext(int index,
java.lang.String[] sequence,
java.lang.String[] priorDecisions,
java.lang.Object[] additionalContext)
BeamSearchContextGenerator
getContext in interface BeamSearchContextGenerator<java.lang.String>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.
public java.lang.String[] getContext(int i,
java.lang.String[] toks,
java.lang.String[] tags,
java.lang.String[] preds)
ChunkerContextGenerator
getContext in interface ChunkerContextGeneratori - The index of the token in the specified toks array for which the context should be constructed.toks - The tokens of the sentence. The toString methods of these objects should return the token text.tags - The POS tags for the the specified tokens.preds - The previous decisions made in the taging of this sequence. Only indices less than i will be examined.
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