Package opennlp.tools.parser
Class ChunkContextGenerator
java.lang.Object
opennlp.tools.parser.ChunkContextGenerator
- All Implemented Interfaces:
ChunkerContextGenerator
,BeamSearchContextGenerator<TokenTag>
Creates predictive context for the pre-chunking phases of parsing.
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Constructor Summary
ConstructorDescriptionInitializes aChunkContextGenerator
instance.ChunkContextGenerator
(int cacheSize) Initializes aChunkContextGenerator
instance with a customcacheSize
. -
Method Summary
Modifier and TypeMethodDescriptionString[]
getContext
(int i, String[] words, String[] prevDecisions, Object[] ac) Deprecated.String[]
getContext
(int i, String[] words, String[] tags, String[] preds) Retrieves the contexts for chunking of the specifiedidx
.String[]
getContext
(int index, TokenTag[] sequence, String[] priorDecisions, Object[] additionalContext) Returns the context for the specified position in the specifiedsequence
(list).String[]
getContext
(Object o) Deprecated.UsegetContext(int, String[], String[], String[])
instead.
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Constructor Details
-
ChunkContextGenerator
public ChunkContextGenerator()Initializes aChunkContextGenerator
instance. -
ChunkContextGenerator
public ChunkContextGenerator(int cacheSize) Initializes aChunkContextGenerator
instance with a customcacheSize
.- Parameters:
cacheSize
- The cache size. Must be greater than0
to have an effect.
-
-
Method Details
-
getContext
Deprecated.UsegetContext(int, String[], String[], String[])
instead. -
getContext
Deprecated.UsegetContext(int, String[], String[], String[])
instead. -
getContext
Description copied from interface:ChunkerContextGenerator
Retrieves the contexts for chunking of the specifiedidx
.- Specified by:
getContext
in interfaceChunkerContextGenerator
- Parameters:
i
- The index of the token in the specifiedtoks
array for which the context should be constructed.words
- The tokens of the sentence. ThetoString
methods of these objects should return the token text.tags
- The POS tags for the specified tokens.preds
- The previous decisions made in the tagging of this sequence. Only indices less thanidx
will be examined.- Returns:
- An array of predictive contexts on which a model basis its decisions.
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getContext
public String[] getContext(int index, TokenTag[] sequence, String[] priorDecisions, Object[] additionalContext) Description copied from interface:BeamSearchContextGenerator
Returns the context for the specified position in the specifiedsequence
(list).- Specified by:
getContext
in interfaceBeamSearchContextGenerator<TokenTag>
- Parameters:
index
- The index of thesequence
.sequence
- The sequence ofitems
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
index
in the specifiedsequence
.
-
getContext(int, String[], String[], String[])
instead.