/**
* Returns any particle this <code>verb</code> may have
*
* @param verb
* @param graph
* @return
*/
static IndexedWord getParticle(final IndexedWord verb, final SemanticGraph graph) {
GrammaticalRelation reln =
edu.stanford.nlp.trees.GrammaticalRelation.getRelation(
edu.stanford.nlp.trees.EnglishGrammaticalRelations.PhrasalVerbParticleGRAnnotation
.class);
return graph.getChildWithReln(verb, reln);
}
static Boolean hasParticle(IndexedWord word, SemanticGraph graph) {
GrammaticalRelation reln =
edu.stanford.nlp.trees.GrammaticalRelation.getRelation(
edu.stanford.nlp.trees.EnglishGrammaticalRelations.PhrasalVerbParticleGRAnnotation
.class);
return graph.hasChildWithReln(word, reln);
}
static boolean hasPrepMod(IndexedWord word, SemanticGraph graph) {
GrammaticalRelation reln =
edu.stanford.nlp.trees.GrammaticalRelation.getRelation(
edu.stanford.nlp.trees.EnglishGrammaticalRelations.PrepositionalModifierGRAnnotation
.class);
return graph.hasChildWithReln(word, reln);
}
/**
* This method decides whether a given <code>verb</code> has a passive subject or a passive
* auxiliary.
*
* @param verb
* @param graph
* @return
*/
static boolean isPassive(IndexedWord verb, SemanticGraph graph) {
// Examples:
// "Dole was defeated by Clinton" nsubjpass(defeated, Dole)
GrammaticalRelation nsubjpass =
GrammaticalRelation.getRelation(NominalPassiveSubjectGRAnnotation.class);
// "That she lied was suspected by everyone" csubjpass(suspected, lied)
GrammaticalRelation csubjpass =
GrammaticalRelation.getRelation(ClausalPassiveSubjectGRAnnotation.class);
// "Kennedy was killed" auxpass(killed, was)
GrammaticalRelation auxrel =
GrammaticalRelation.getRelation(EnglishGrammaticalRelations.AuxPassiveGRAnnotation.class);
Boolean passive = false;
passive = passive || graph.hasChildWithReln(verb, nsubjpass);
passive = passive || graph.hasChildWithReln(verb, csubjpass);
passive = passive || graph.hasChildWithReln(verb, auxrel);
return passive;
}
/**
* Decides whether this word has a direct object.
*
* @param word the word to analyse
* @param graph the sentence to which this word belongs
* @return TRUE, if a direct object is present for this verb
*/
static boolean hasDirectObjectNP(IndexedWord word, SemanticGraph graph) {
GrammaticalRelation reln =
edu.stanford.nlp.trees.GrammaticalRelation.getRelation(
edu.stanford.nlp.trees.EnglishGrammaticalRelations.DirectObjectGRAnnotation.class);
if (graph.hasChildWithReln(word, reln)) {
String pos = graph.getChildWithReln(word, reln).get(PartOfSpeechAnnotation.class);
if (pos.equalsIgnoreCase("NN")) {
return true;
}
}
return false;
}
/**
* Finds a direct object. ex: the chair in "move the chair"
*
* @param word
* @param graph
* @return
*/
public static IndexedWord getDirectObject(IndexedWord word, SemanticGraph graph) {
GrammaticalRelation reln =
edu.stanford.nlp.trees.GrammaticalRelation.getRelation(
edu.stanford.nlp.trees.EnglishGrammaticalRelations.DirectObjectGRAnnotation.class);
return graph.getChildWithReln(word, reln);
}
/**
* This method decides whether a given <code>word</code> has an agent. Ex: "The man has been
* killed by the police"
*
* @param word
* @param graph
* @return
*/
static boolean hasAgent(IndexedWord word, SemanticGraph graph) {
// implement a check for agent(root, nounphrase)
GrammaticalRelation agentrel = GrammaticalRelation.getRelation(AgentGRAnnotation.class);
return graph.hasChildWithReln(word, agentrel);
}