edu.illinois.cs.cogcomp.nlp.utilities

Class CollinsHeadFinder

java.lang.Object

edu.illinois.cs.cogcomp.nlp.utilities.HeadFinderBase

edu.illinois.cs.cogcomp.nlp.utilities.CollinsHeadFinder

public class CollinsHeadFinder
extends HeadFinderBase

An instantiation of HeadFinderBase with Collins's rules (Collins, 1999)

Author:

Vivek Srikumar

Nested Class Summary

Nested classes/interfaces inherited from class edu.illinois.cs.cogcomp.nlp.utilities.HeadFinderBase

HeadFinderBase.HeadSearchDirection

Field Summary

Fields

Modifier and Type	Field and Description
protected HashMap<String,List<Pair<HeadFinderBase.HeadSearchDirection,String[]>>>	headFinderInformation
static CollinsHeadFinder	instance

Fields inherited from class edu.illinois.cs.cogcomp.nlp.utilities.HeadFinderBase

defaultRule

Constructor Summary

Constructors

Constructor and Description
CollinsHeadFinder()

Method Summary

Modifier and Type	Method and Description
protected int	fixHeadChildHacks(int headChildId, Constituent tree)
static CollinsHeadFinder	getInstance()
List<Pair<HeadFinderBase.HeadSearchDirection,String[]>>	getNonterminalHeadInformation(String nonTerminal) Return information about how the head is to be computed, given the non-terminal.

Methods inherited from class edu.illinois.cs.cogcomp.nlp.utilities.HeadFinderBase

findHead, getChildLabel, getHeadChild, getHeadWord, getHeadWordPosition, getPredefinedHead

Methods inherited from class java.lang.Object

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

Field Detail

instance

public static CollinsHeadFinder instance

headFinderInformation

protected HashMap<String,List<Pair<HeadFinderBase.HeadSearchDirection,String[]>>> headFinderInformation

Constructor Detail

CollinsHeadFinder

public CollinsHeadFinder()

Method Detail

getInstance

public static CollinsHeadFinder getInstance()

getNonterminalHeadInformation

public List<Pair<HeadFinderBase.HeadSearchDirection,String[]>> getNonterminalHeadInformation(String nonTerminal)

Description copied from class: HeadFinderBase

Return information about how the head is to be computed, given the non-terminal.

NOTE: If no rule is specified, return null.

Specified by:

getNonterminalHeadInformation in class HeadFinderBase

fixHeadChildHacks

protected int fixHeadChildHacks(int headChildId,
                                Constituent tree)

Overrides:

fixHeadChildHacks in class HeadFinderBase