/**
* If relation is lexical, return the {@link SensedWord}s that are directly related to the given
* <lemma, synset>. If relation is semantic, return a {@link SensedWord} for each word in the
* synsets related to the given synset, within #chainingLength steps away.
*
* @param lemma
* @param synset
* @param relation
* @param chainingLength is the size of transitive relation chaining to be performed on the
* retrieved rules. E.g. if chainingLength = 3, then every hypernym/hyponym, merornym and
* holonym query will return rules with words related up to the 3rd degree (that's 1st, 2nd or
* 3rd) from the original term. Queries on non transitive relations are unaffected by this
* parameter. Must be positive.
* @return
* @throws WordNetException
*/
private Set<SensedWord> getSemanticOrLexicalNeighborSensedWords(
String lemma, Synset synset, WordNetRelation relation, int chainingLength)
throws WordNetException {
Set<SensedWord> relatedSensedWords;
if (relation.isLexical()) {
SensedWord sensedWord = dictionary.getSensedWord(lemma, synset);
relatedSensedWords = sensedWord.getNeighborSensedWords(relation);
} else {
relatedSensedWords = new LinkedHashSet<SensedWord>();
Set<Synset> relatedSynsets =
synset.getRelatedSynsets(relation, chainingLength); // getNeighbors(relation);
for (Synset relatedSynset : relatedSynsets)
relatedSensedWords.addAll(relatedSynset.getAllSensedWords());
}
return relatedSensedWords;
}
/**
* return the synsets that are either the semantically related synsets, or the synsets containing
* the lexically related words. If the relation is semantic, these synsets can be from 1 to
* #chainingLength WN steps away from the given synset.
*
* @param lemma
* @param synset
* @param relation
* @param chainingLength is the size of transitive relation chaining to be performed on the
* retrieved rules. E.g. if chainingLength = 3, then every hypernym/hyponym, merornym and
* holonym query will return rules with words related up to the 3rd degree (that's 1st, 2nd or
* 3rd) from the original term. Queries on non transitive relations are unaffected by this
* parameter. Must be positive.
* @return
* @throws WordNetException
*/
private Set<Synset> getSemanticOrLexicalNeighbors(
String lemma, Synset synset, WordNetRelation relation, int chainingLength)
throws WordNetException {
Set<Synset> synsets;
if (relation.isLexical()) {
SensedWord sensedWord = dictionary.getSensedWord(lemma, synset);
synsets = new LinkedHashSet<Synset>();
for (SensedWord aSensedWord : sensedWord.getNeighborSensedWords(relation)) {
synsets.add(aSensedWord.getSynset());
}
} else {
synsets = synset.getRelatedSynsets(relation, chainingLength);
}
return synsets;
}
/**
* Return all the rules matching the given lemma+pos on one side of the rule, filtered to the
* given relations and info.
*
* @param lemma
* @param pos
* @param relations
* @param info
* @param chainingLength
* @param isFromRight
* @return
* @throws LexicalResourceException
*/
List<LexicalRule<? extends WordnetRuleInfo>> getRulesForSide(
String lemma,
PartOfSpeech pos,
Set<WordNetRelation> relations,
WordnetRuleInfo info,
int chainingLength,
boolean isFromRight)
throws LexicalResourceException {
// sanity
checkRelationsBeforeUse(relations);
checkInfo(info);
List<LexicalRule<? extends WordnetRuleInfo>> rulesList =
new ArrayList<
LexicalRule<? extends WordnetRuleInfo>>(); // use Set to eliminate duplicate rules
int sourceSenseNum, targetSenseNum;
if (isFromRight) {
sourceSenseNum = info.getRightSenseNo();
targetSenseNum = info.getLeftSenseNo();
} else {
sourceSenseNum = info.getLeftSenseNo();
targetSenseNum = info.getRightSenseNo();
}
// carefully pull the synset
List<Synset> synsets = pullSynsets(lemma, pos, sourceSenseNum);
try {
for (int synsetNo = 1; synsetNo <= synsets.size(); synsetNo++) {
Synset synset = synsets.get(synsetNo - 1);
for (WordNetRelation relation : relations) {
if (relation.equals(SYNONYM))
rulesList.addAll(getSynonymRules(synset, synsetNo, lemma, isFromRight, targetSenseNum));
else {
// when querying words on the right, look to the left, using the symmetric relation
WordNetRelation relationToQuery =
isFromRight ? relation.getSymmetricRelation() : relation;
try {
if (relationToQuery != null) // getSymmetricRelation() may return null
for (SensedWord neighborSensedWord :
getSemanticOrLexicalNeighborSensedWords(
lemma, synset, relationToQuery, chainingLength)) {
// construct a rule from all this data we now have
Synset neighborSynset = neighborSensedWord.getSynset();
PartOfSpeech originPos;
PartOfSpeech neighborPos;
try {
originPos = synset.getPartOfSpeech().toPartOfSpeech();
neighborPos = neighborSynset.getPartOfSpeech().toPartOfSpeech();
} catch (WordNetException e) {
throw new LexicalResourceException(
"Bug! this POS from wordnet '"
+ neighborSynset.getPartOfSpeech()
+ "' isn't valid");
}
String neighborLemma = neighborSensedWord.getWord();
boolean addThisRule = true;
if (targetSenseNum != -1) {
addThisRule =
isCorrectSenseOfGivenWord(
neighborSynset,
neighborLemma,
neighborSynset.getPartOfSpeech(),
targetSenseNum);
}
if (addThisRule) {
LexicalRule<WordnetRuleInfo> rule =
newDirectedRule(
neighborLemma,
neighborPos,
lemma,
originPos,
relation,
neighborSynset,
synset,
synsetNo,
isFromRight);
if (!rulesList.contains(rule)) rulesList.add(rule);
}
}
} catch (WordNetException e) {
throw new LexicalResourceException("wordnet error occured, see nested", e);
}
}
}
}
} catch (LexicalResourceException e) {
throw new LexicalResourceException(
"An error occured while extracting the neighbors for <" + lemma + ", " + pos + ">", e);
}
return rulesList;
}
