Package opennlp.tools.ml.model
Class RealValueFileEventStream
java.lang.Object
opennlp.tools.ml.model.FileEventStream
opennlp.tools.ml.model.RealValueFileEventStream
- All Implemented Interfaces:
AutoCloseable,ObjectStream<Event>
Class for using a file of real-valued
events as an
event stream.
The format of the file is one event per line with
each line consisting of outcome followed by contexts (space delimited).- See Also:
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Constructor Summary
ConstructorsConstructorDescriptionRealValueFileEventStream(File file) Instantiates aRealValueFileEventStreamvia aFile.RealValueFileEventStream(String fileName) Instantiates aRealValueFileEventStreamfrom the specified file name.RealValueFileEventStream(String fileName, String encoding) Instantiates aRealValueFileEventStreamfrom the specified file name. -
Method Summary
Modifier and TypeMethodDescriptionstatic float[]parseContexts(String[] contexts) Parses the specified contexts and re-populates context array with features and returns the values for these features.read()Returns the nextObjectStreamobject.Methods inherited from class opennlp.tools.ml.model.FileEventStream
close, reset, toLine
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Constructor Details
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RealValueFileEventStream
Instantiates aRealValueFileEventStreamfrom the specified file name.- Parameters:
fileName- The name fo the file containing the events.- Throws:
IOException- Thrown if the specified file can not be read.
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RealValueFileEventStream
Instantiates aRealValueFileEventStreamfrom the specified file name.- Parameters:
fileName- The name fo the file containing the events.encoding- The name of thecharacter encoding.- Throws:
IOException- Thrown if the specified file can not be read.
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RealValueFileEventStream
Instantiates aRealValueFileEventStreamvia aFile.- Parameters:
file- TheFilethat holds events.- Throws:
IOException- Thrown if the specified file can not be read.
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Method Details
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parseContexts
Parses the specified contexts and re-populates context array with features and returns the values for these features. If all values are unspecified, thennullis returned.- Parameters:
contexts- The contexts with real values specified.- Returns:
- The value for each context or null if all values are unspecified.
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read
Description copied from interface:ObjectStreamReturns the nextObjectStreamobject. Calling this method repeatedly until it returnsnullwill return each object from the underlying source exactly once.- Specified by:
readin interfaceObjectStream<Event>- Overrides:
readin classFileEventStream- Returns:
- The next object or
nullto signal that the stream is exhausted. - Throws:
IOException- Thrown if there is an error during reading.
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