opennlp.tools.util.eval

Class CrossValidationPartitioner.TrainingSampleStream<E>

java.lang.Object

opennlp.tools.util.eval.CrossValidationPartitioner.TrainingSampleStream<E>

Type Parameters:

E -

All Implemented Interfaces:

AutoCloseable, ObjectStream<E>

Enclosing class:

CrossValidationPartitioner<E>

public static class CrossValidationPartitioner.TrainingSampleStream<E>
extends Object
implements ObjectStream<E>

The TrainingSampleStream which iterates over all training elements. Note: After the TestSampleStream was obtained the TrainingSampleStream must not be used anymore, otherwise a IllegalStateException is thrown. The ObjectStreams must not be used anymore after the CrossValidationPartitioner was moved to one of next partitions. If they are called anyway a IllegalStateException is thrown.

Method Summary

Modifier and Type	Method and Description
void	close() Closes the ObjectStream and releases all allocated resources.
ObjectStream<E>	getTestSampleStream() Retrieves the ObjectStream over the test/evaluations elements and poisons this TrainingSampleStream.
E	read() Returns the next object.
void	reset() Resets the training sample.

Methods inherited from class java.lang.Object

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

Method Detail

read

public E read()
       throws IOException

Description copied from interface: ObjectStream

Returns the next object. Calling this method repeatedly until it returns null will return each object from the underlying source exactly once.

Specified by:

read in interface ObjectStream<E>

Returns:

the next object or null to signal that the stream is exhausted

Throws:

IOException - if there is an error during reading

reset

public void reset()
           throws IOException

Resets the training sample. Use this if you need to collect things before training, for example, to collect induced abbreviations or create a POS Dictionary.

Specified by:

reset in interface ObjectStream<E>

Throws:

IOException

close

public void close()
           throws IOException

Description copied from interface: ObjectStream

Closes the ObjectStream and releases all allocated resources. After close was called its not allowed to call read or reset.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ObjectStream<E>

Throws:

IOException - if there is an error during closing the stream

getTestSampleStream

public ObjectStream<E> getTestSampleStream()
                                    throws IOException

Retrieves the ObjectStream over the test/evaluations elements and poisons this TrainingSampleStream. From now on calls to the hasNext and next methods are forbidden and will raise anIllegalArgumentException.

Returns:

the test sample stream

Throws:

IOException