simplenlg.aggregation

Class ClauseCoordinationRule

java.lang.Object

simplenlg.aggregation.AggregationRule

simplenlg.aggregation.ClauseCoordinationRule

public class ClauseCoordinationRule
extends AggregationRule

Implementation of a clausal coordination rule. The rule performs the following operations on sentences:

1. If the sentences have the same subject, a new sentence is returned with that subject, and the VP from the component sentences conjoined. For example John kicked the ball. and John sang a song. becomes John kicked the ball and sang a song.
2. If the sentences have the same VP, a new sentence is returned with that VP, and the subjects from the component sentences conjoined. For example John kicked the ball. and Mary kicked the ball. become John and Mary kicked the ball.

These operations only apply to sentences whose front modifiers are identical, that is, sentences where, for every pair s1 and s2, s1.getFrontModifiers().equals(s2.getFrontModifiers()).

Note:: it is not recommended to use this rule in addition to BackwardConjunctionReductionRule and/or ForwardConjunctionReductionRule.

Author:

Albert Gatt, University of Malta & University of Aberdeen

Field Summary

Fields inherited from class simplenlg.aggregation.AggregationRule

factory

Constructor Summary

Constructors

Constructor and Description
ClauseCoordinationRule() Constructs an instance of the ClauseCoordinationRule

Method Summary

Modifier and Type	Method and Description
NLGElement	apply(NLGElement previous, NLGElement next) Applies aggregation to two NLGElements e1 and e2, succeeding only if they are clauses (that is, e1.getCategory() == e2.getCategory == PhraseCategory.CLAUSE).

Methods inherited from class simplenlg.aggregation.AggregationRule

apply, apply, getFactory, setFactory

Methods inherited from class java.lang.Object

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

Constructor Detail

ClauseCoordinationRule

public ClauseCoordinationRule()

Constructs an instance of the ClauseCoordinationRule

Method Detail

apply

public NLGElement apply(NLGElement previous,
                        NLGElement next)

Applies aggregation to two NLGElements e1 and e2, succeeding only if they are clauses (that is, e1.getCategory() == e2.getCategory == PhraseCategory.CLAUSE).

Specified by:

apply in class AggregationRule

Parameters:

previous - the first sentence

next - the second sentence

Returns:

an aggregated sentence, if the method succeeds, null otherwise