simplenlg.aggregation

Class PhraseChecker

java.lang.Object

simplenlg.aggregation.PhraseChecker

public abstract class PhraseChecker
extends Object

This class contains a number of utility methods for checking and collecting sentence components during the process of aggregation.

Author:

agatt

Constructor Summary

Constructors

Constructor and Description
PhraseChecker()

Method Summary

Modifier and Type	Method and Description
static boolean	allActive(NLGElement... sentences) Check whether all sentences are active
static boolean	allPassive(NLGElement... sentences) Check whether all sentences are passive
static boolean	expletiveSubjects(NLGElement... sentences) Check whether these sentences have expletive subjects (there, it etc)
static boolean	haveSameVoice(NLGElement... sentences) Check that the sentences supplied are either all active or all passive.
static List<PhraseSet>	leftPeriphery(NLGElement... sentences) Collect a list of pairs of constituents with the same syntactic function from the left periphery of two sentences.
static boolean	nonePassive(NLGElement... sentences) Check that no element of a give array of sentences is passive.
static List<PhraseSet>	rightPeriphery(NLGElement... sentences) Collect a list of pairs of constituents with the same syntactic function from the right periphery of two sentences.
static boolean	sameFrontMods(NLGElement... sentences) Check that the sentences supplied have identical front modifiers
static boolean	samePostMods(NLGElement... sentences) Check that some phrases have the same postmodifiers
static boolean	sameSentences(NLGElement... sentences) Check that the sentences supplied are identical
static boolean	sameSubjects(NLGElement... sentences) Check that the sentences supplied have identical subjects
static boolean	sameSurfaceSubjects(NLGElement... sentences) Check whether the sentences have the same surface subjects, that is, they are either all active and have the same subjects, or all passive and have the same passive raising subjects.
static boolean	sameVP(NLGElement... sentences) Check that the sentences supplied have identical verb phrases
static boolean	sameVPArgs(NLGElement... sentences) Check that the sentences supplied have the same complements at VP level.
static boolean	sameVPHead(NLGElement... sentences) Check that a list of sentences have the same verb
static boolean	sameVPModifiers(NLGElement... sentences) check that the phrases supplied are sentences and have the same VP premodifiers and postmodifiers

Methods inherited from class java.lang.Object

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

Constructor Detail

PhraseChecker

public PhraseChecker()

Method Detail

sameSentences

public static boolean sameSentences(NLGElement... sentences)

Check that the sentences supplied are identical

Parameters:

sentences - the sentences

Returns:

true if for every pair of sentences s1 and s2, s1.equals(s2).

expletiveSubjects

public static boolean expletiveSubjects(NLGElement... sentences)

Check whether these sentences have expletive subjects (there, it etc)

Parameters:

sentences - the sentences

Returns:

true if all the sentences have expletive subjects

sameFrontMods

public static boolean sameFrontMods(NLGElement... sentences)

Check that the sentences supplied have identical front modifiers

Parameters:

sentences - the sentences

Returns:

true if for every pair of sentences s1 and s2, s1.getFrontModifiers().equals(s2.getFrontModifiers()) .

samePostMods

public static boolean samePostMods(NLGElement... sentences)

Check that some phrases have the same postmodifiers

Parameters:

sentences - the phrases

Returns:

true if they have the same postmodifiers

sameSubjects

public static boolean sameSubjects(NLGElement... sentences)

Check that the sentences supplied have identical subjects

Parameters:

sentences - the sentences

Returns:

true if for every pair of sentences s1 and s2 s1.getSubjects().equals(s2.getSubjects()).

allPassive

public static boolean allPassive(NLGElement... sentences)

Check whether all sentences are passive

Parameters:

sentences - the sentences

Returns:

true if for every sentence s, s.isPassive() == true.

allActive

public static boolean allActive(NLGElement... sentences)

Check whether all sentences are active

Parameters:

sentences - the sentences

Returns:

true if for every sentence s, s.isPassive() == false.

sameSurfaceSubjects

public static boolean sameSurfaceSubjects(NLGElement... sentences)

Check whether the sentences have the same surface subjects, that is, they are either all active and have the same subjects, or all passive and have the same passive raising subjects.

Parameters:

sentences - the sentences

Returns:

true if the sentences have the same surface subjects

sameVPHead

public static boolean sameVPHead(NLGElement... sentences)

Check that a list of sentences have the same verb

Parameters:

sentences - the sentences

Returns:

true if for every pair of sentences s1 and s2 s1.getVerbPhrase().getHead().equals(s2.getVerbPhrase().getHead())

haveSameVoice

public static boolean haveSameVoice(NLGElement... sentences)

Check that the sentences supplied are either all active or all passive.

Parameters:

sentences - the sentences

Returns:

true if the sentences have the same voice

sameVP

public static boolean sameVP(NLGElement... sentences)

Check that the sentences supplied have identical verb phrases

Parameters:

sentences - the sentences

Returns:

true if for every pair of sentences s1 and s2, s1.getVerbPhrase().equals(s2.getVerbPhrase()).

sameVPArgs

public static boolean sameVPArgs(NLGElement... sentences)

Check that the sentences supplied have the same complements at VP level.

Parameters:

sentences - the sentences

Returns:

true if for every pair of sentences s1 and s2, their VPs have the same pre- and post-modifiers and complements.

sameVPModifiers

public static boolean sameVPModifiers(NLGElement... sentences)

check that the phrases supplied are sentences and have the same VP premodifiers and postmodifiers

Parameters:

sentences - the sentences

Returns:

true if all pairs of sentences have VPs with the same pre and postmodifiers

leftPeriphery

public static List<PhraseSet> leftPeriphery(NLGElement... sentences)

Collect a list of pairs of constituents with the same syntactic function from the left periphery of two sentences. The left periphery encompasses the subjects, front modifiers and cue phrases of the sentences.

Parameters:

sentences - the list of sentences

Returns:

a list of pairs of constituents with the same function, if any are found

rightPeriphery

public static List<PhraseSet> rightPeriphery(NLGElement... sentences)

Collect a list of pairs of constituents with the same syntactic function from the right periphery of two sentences. The right periphery encompasses the complements of the main verb, and its postmodifiers.

Parameters:

sentences - the list of sentences

Returns:

a list of pairs of constituents with the same function, if any are found

nonePassive

public static boolean nonePassive(NLGElement... sentences)

Check that no element of a give array of sentences is passive.

Parameters:

sentences - the sentences

Returns:

true if none of the sentences is passive