opennlp.tools.ml.model

Class OnePassDataIndexer

java.lang.Object

opennlp.tools.ml.model.AbstractDataIndexer

opennlp.tools.ml.model.OnePassDataIndexer

All Implemented Interfaces:

DataIndexer

Direct Known Subclasses:

OnePassRealValueDataIndexer

public class OnePassDataIndexer
extends AbstractDataIndexer

An indexer for maxent model data which handles cutoffs for uncommon contextual predicates and provides a unique integer index for each of the predicates.

Constructor Summary

Constructors

Constructor and Description
OnePassDataIndexer(ObjectStream<Event> eventStream) One argument constructor for DataIndexer which calls the two argument constructor assuming no cutoff.
OnePassDataIndexer(ObjectStream<Event> eventStream, int cutoff)
OnePassDataIndexer(ObjectStream<Event> eventStream, int cutoff, boolean sort) Two argument constructor for DataIndexer.

Method Summary

Methods inherited from class opennlp.tools.ml.model.AbstractDataIndexer

getContexts, getNumEvents, getNumTimesEventsSeen, getOutcomeLabels, getOutcomeList, getPredCounts, getPredLabels, getValues

Methods inherited from class java.lang.Object

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

Constructor Detail

OnePassDataIndexer

public OnePassDataIndexer(ObjectStream<Event> eventStream)
                   throws java.io.IOException

One argument constructor for DataIndexer which calls the two argument constructor assuming no cutoff.

Parameters:

eventStream - An Event[] which contains the a list of all the Events seen in the training data.

Throws:

java.io.IOException

OnePassDataIndexer

public OnePassDataIndexer(ObjectStream<Event> eventStream,
                          int cutoff)
                   throws java.io.IOException

Throws:

java.io.IOException

OnePassDataIndexer

public OnePassDataIndexer(ObjectStream<Event> eventStream,
                          int cutoff,
                          boolean sort)
                   throws java.io.IOException

Two argument constructor for DataIndexer.

Parameters:

eventStream - An Event[] which contains the a list of all the Events seen in the training data.

cutoff - The minimum number of times a predicate must have been observed in order to be included in the model.

Throws:

java.io.IOException