opennlp.tools.parser
Class AbstractParserEventStream

java.lang.Object
  opennlp.tools.parser.AbstractParserEventStream

All Implemented Interfaces:

opennlp.maxent.EventStream

Direct Known Subclasses:

ParserEventStream

public abstract class AbstractParserEventStream
extends java.lang.Object
implements opennlp.maxent.EventStream

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 java.util.Set	punctSet
protected HeadRules	rules

Constructor Summary

AbstractParserEventStream(opennlp.maxent.DataStream d, HeadRules rules, ParserEventTypeEnum etype)

AbstractParserEventStream(opennlp.maxent.DataStream d, HeadRules rules, ParserEventTypeEnum etype, Dictionary dict)

Method Summary

protected abstract void	addParseEvents(java.util.List newEvents, Parse[] chunks) Produces all events for the specified sentence chunks and adds them to the specified list.
static Parse[]	getInitialChunks(Parse p)
boolean	hasNext()
protected void	init()
protected boolean	lastChild(Parse child, Parse parent) Returns true if the specified child is the last child of the specified parent.
opennlp.maxent.Event	nextEvent()

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 java.util.Set 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(opennlp.maxent.DataStream d,
                                 HeadRules rules,
                                 ParserEventTypeEnum etype,
                                 Dictionary dict)

AbstractParserEventStream

public AbstractParserEventStream(opennlp.maxent.DataStream d,
                                 HeadRules rules,
                                 ParserEventTypeEnum etype)

Method Detail

init

protected void init()

nextEvent

public opennlp.maxent.Event nextEvent()

Specified by:

nextEvent in interface opennlp.maxent.EventStream

hasNext

public boolean hasNext()

Specified by:

hasNext in interface opennlp.maxent.EventStream

getInitialChunks

public static Parse[] getInitialChunks(Parse p)

addParseEvents

protected abstract void addParseEvents(java.util.List 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.