opennlp.tools.parser
Class AbstractParserEventStream

java.lang.Object
  opennlp.model.AbstractEventStream
      opennlp.tools.util.AbstractEventStream<Parse>
          opennlp.tools.parser.AbstractParserEventStream

All Implemented Interfaces:

opennlp.model.EventStream

Direct Known Subclasses:

ParserEventStream, ParserEventStream

public abstract class AbstractParserEventStream
extends AbstractEventStream<Parse>

Abstract class extended by parser event streams which perform tagging and chunking.

Author:

Tom Morton

Field Summary

protected Dictionary	dict
protected ParserEventTypeEnum	etype The type of events being generated by this event stream.
protected boolean	fixPossesives
protected Set<String>	punctSet
protected HeadRules	rules

Constructor Summary

AbstractParserEventStream(ObjectStream<Parse> d, HeadRules rules, ParserEventTypeEnum etype)

AbstractParserEventStream(ObjectStream<Parse> d, HeadRules rules, ParserEventTypeEnum etype, Dictionary dict)

Method Summary

protected abstract void	addParseEvents(List<opennlp.model.Event> newEvents, Parse[] chunks) Produces all events for the specified sentence chunks and adds them to the specified list.
protected Iterator<opennlp.model.Event>	createEvents(Parse sample) Creates events for the provided sample.
static Parse[]	getInitialChunks(Parse p)
protected void	init()
protected boolean	lastChild(Parse child, Parse parent) Returns true if the specified child is the last child of the specified parent.

Methods inherited from class opennlp.tools.util.AbstractEventStream

hasNext, next

Methods inherited from class opennlp.model.AbstractEventStream

remove

Methods inherited from class java.lang.Object

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

Field Detail

rules

protected HeadRules rules

punctSet

protected Set<String> punctSet

etype

protected ParserEventTypeEnum etype

The type of events being generated by this event stream.

fixPossesives

protected boolean fixPossesives

dict

protected Dictionary dict

Constructor Detail

AbstractParserEventStream

public AbstractParserEventStream(ObjectStream<Parse> d,
                                 HeadRules rules,
                                 ParserEventTypeEnum etype,
                                 Dictionary dict)

AbstractParserEventStream

public AbstractParserEventStream(ObjectStream<Parse> d,
                                 HeadRules rules,
                                 ParserEventTypeEnum etype)

Method Detail

createEvents

protected Iterator<opennlp.model.Event> createEvents(Parse sample)

Description copied from class: AbstractEventStream

Creates events for the provided sample.

Specified by:

createEvents in class AbstractEventStream<Parse>

Parameters:

sample - the sample for which training Events are be created.

Returns:

an Iterator of training events or an empty Iterator.

init

protected void init()

getInitialChunks

public static Parse[] getInitialChunks(Parse p)

addParseEvents

protected abstract void addParseEvents(List<opennlp.model.Event> newEvents,
                                       Parse[] chunks)

Produces all events for the specified sentence chunks and adds them to the specified list.

Parameters:

newEvents - A list of events to be added to.

chunks - Pre-chunked constituents of a sentence.

lastChild

protected boolean lastChild(Parse child,
                            Parse parent)

Returns true if the specified child is the last child of the specified parent.

Parameters:

child - The child parse.

parent - The parent parse.

Returns:

true if the specified child is the last child of the specified parent; false otherwise.