Package opennlp.tools.postag
Class POSTaggerFactory
java.lang.Object
opennlp.tools.util.BaseToolFactory
opennlp.tools.postag.POSTaggerFactory
The factory that provides
POSTagger default implementations and resources.-
Nested Class Summary
Nested Classes -
Constructor Summary
ConstructorsConstructorDescriptionInitializes aPOSTaggerFactorythat provides the default implementation of the resources.POSTaggerFactory(byte[] featureGeneratorBytes, Map<String, Object> resources, TagDictionary posDictionary) Initializes aPOSTaggerFactoryfrom a given set of the resources. -
Method Summary
Modifier and TypeMethodDescriptionstatic POSTaggerFactorycreate(String subclassName, byte[] featureGeneratorBytes, Map<String, Object> resources, TagDictionary posDictionary) Instantiates aPOSTaggerFactoryvia a givensubclassName.A model's implementation should call this constructor that creates a model programmatically.Creates aMapwith pairs of keys andArtifactSerializer.Creates theAdaptiveFeatureGenerator.createTagDictionary(File dictionary) Initializes aTagDictionaryfrom adictionary file.Initializes aTagDictionaryfrom adictionary stream.getPOSContextGenerator(int cacheSize) voidsetTagDictionary(TagDictionary dictionary) voidValidates the parsed artifacts.Methods inherited from class opennlp.tools.util.BaseToolFactory
create, create, createManifestEntries
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Constructor Details
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POSTaggerFactory
public POSTaggerFactory()Initializes aPOSTaggerFactorythat provides the default implementation of the resources. -
POSTaggerFactory
public POSTaggerFactory(byte[] featureGeneratorBytes, Map<String, Object> resources, TagDictionary posDictionary) Initializes aPOSTaggerFactoryfrom a given set of the resources.- Parameters:
featureGeneratorBytes- The bytes for feature generation.resources- Additional resources as key-value map.posDictionary- ATagDictionaryused for the new instance.
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Method Details
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createFeatureGenerators
Creates theAdaptiveFeatureGenerator. Usually this is a set of generators contained in theAggregatedFeatureGenerator.Note: The generators are created on every call to this method.
- Returns:
- the feature generator or
nullif there is no descriptor in the model - Throws:
IllegalStateException- Thrown if inconsistencies occurred during creation.
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createArtifactSerializersMap
Description copied from class:BaseToolFactoryCreates aMapwith pairs of keys andArtifactSerializer. The models implementation should call this method fromBaseModel#createArtifactSerializersMap.The base implementation will return a
HashMapthat should be populated by subclasses.- Overrides:
createArtifactSerializersMapin classBaseToolFactory
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createArtifactMap
Description copied from class:BaseToolFactoryA model's implementation should call this constructor that creates a model programmatically.The base implementation will return a
HashMapthat should be populated by subclasses.- Overrides:
createArtifactMapin classBaseToolFactory- Returns:
- Retrieves a
Mapwith pairs of keys and objects.
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createTagDictionary
Initializes aTagDictionaryfrom adictionary file.- Parameters:
dictionary- TheFileused for creating the dictionary.- Returns:
- A valid
TagDictionaryready for use. - Throws:
IOException- Thrown if IO errors occurred during creation.
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createTagDictionary
Initializes aTagDictionaryfrom adictionary stream.- Parameters:
in- TheInputStreamused for creating the dictionary.- Returns:
- A valid
TagDictionaryready for use. - Throws:
IOException- Thrown if IO errors occurred during creation.
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setTagDictionary
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getTagDictionary
- Returns:
- The
TagDictionaryused.
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getPOSContextGenerator
- Returns:
- The
POSContextGeneratorwith a default cache size of0.
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getPOSContextGenerator
- Parameters:
cacheSize- Must be greater than or equal to0.- Returns:
- The
POSContextGeneratorconfigured with the givencacheSize.
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getSequenceValidator
- Returns:
- The
SequenceValidatorused.
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validateArtifactMap
Description copied from class:BaseToolFactoryValidates the parsed artifacts.Note: Subclasses should generally invoke
super.validateArtifactMapat the beginning of this method.- Specified by:
validateArtifactMapin classBaseToolFactory- Throws:
InvalidFormatException- Thrown if validation found invalid states.
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create
public static POSTaggerFactory create(String subclassName, byte[] featureGeneratorBytes, Map<String, Object> resources, TagDictionary posDictionary) throws InvalidFormatExceptionInstantiates aPOSTaggerFactoryvia a givensubclassName.- Parameters:
subclassName- The class name used for instantiation. Ifnull, an instance ofPOSTaggerFactorywill be returned per default. Otherwise, theExtensionLoadermechanism is applied to load the requestedsubclassName.featureGeneratorBytes- The bytes for feature generation.resources- Additional resources as key-value map.posDictionary- ATagDictionaryused for the new instance.- Returns:
- Throws:
InvalidFormatException- Thrown if theExtensionLoadermechanism failed to load the factory via thesubclassName.
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createEmptyTagDictionary
- Returns:
- An empty, case-sensitive
TagDictionary.
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