opennlp.tools.parser.chunking
Class ParserEventStream

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

All Implemented Interfaces:

opennlp.model.EventStream

public class ParserEventStream
extends AbstractParserEventStream

Wrapper class for one of four parser event streams. The particular event stream is specified at construction.

Author:

Tom Morton

Field Summary

protected BuildContextGenerator	bcg
protected CheckContextGenerator	kcg

Fields inherited from class opennlp.tools.parser.AbstractParserEventStream

dict, etype, fixPossesives, punctSet, rules

Constructor Summary

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

ParserEventStream(ObjectStream<Parse> d, HeadRules rules, ParserEventTypeEnum etype, Dictionary dict)
Create an event stream based on the specified data stream of the specified type using the specified head rules.

Method Summary

protected void	addParseEvents(List<opennlp.model.Event> parseEvents, Parse[] chunks) Adds events for parsing (post tagging and chunking to the specified list of events for the specified parse chunks.
protected boolean	firstChild(Parse child, Parse parent) Returns true if the specified child is the first child of the specified parent.
protected void	init()
static void	main(String[] args)
static Parse[]	reduceChunks(Parse[] chunks, int ci, Parse parent)

Methods inherited from class opennlp.tools.parser.AbstractParserEventStream

createEvents, getInitialChunks, lastChild

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

bcg

protected BuildContextGenerator bcg

kcg

protected CheckContextGenerator kcg

Constructor Detail

ParserEventStream

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

Create an event stream based on the specified data stream of the specified type using the specified head rules.

Parameters:

d - A 1-parse-per-line Penn Treebank Style parse.

rules - The head rules.

etype - The type of events desired (tag, chunk, build, or check).

dict - A tri-gram dictionary to reduce feature generation.

ParserEventStream

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

Method Detail

init

protected void init()

Overrides:

init in class AbstractParserEventStream

firstChild

protected boolean firstChild(Parse child,
                             Parse parent)

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

Parameters:

child - The child parse.

parent - The parent parse.

Returns:

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

reduceChunks

public static Parse[] reduceChunks(Parse[] chunks,
                                   int ci,
                                   Parse parent)

addParseEvents

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

Adds events for parsing (post tagging and chunking to the specified list of events for the specified parse chunks.

Specified by:

addParseEvents in class AbstractParserEventStream

Parameters:

parseEvents - The events for the specified chunks.

chunks - The incomplete parses to be parsed.

main

public static void main(String[] args)
                 throws IOException,
                        InvalidFormatException

Throws:

IOException

InvalidFormatException