/** generate the dependency parse for a sentence, adding its arcs to 'relations'. */
public static void parseSentence(Document doc, Span span, SyntacticRelationSet relations) {
if (fsw == null) {
System.out.println("DepParser: no model loaded");
return;
}
// System.out.println ("parseSentence: " + doc.text(span));
// run Penn part-of-speech tagger
// JetTest.tagger.annotate(doc, span, "tagger");
// build sentence
List<Token> tokens = new ArrayList<Token>();
List<Integer> offset = new ArrayList<Integer>();
offset.add(0); // don't use 0th entry
int tokenNum = 0;
int posn = span.start();
while (posn < span.end()) {
tokenNum++;
Annotation tokenAnnotation = doc.tokenAt(posn);
for (String s : SPECIAL_TOKEN) {
Vector<Annotation> va = doc.annotationsAt(posn, s);
if (va != null && va.size() > 0) {
tokenAnnotation = va.get(0);
break;
}
}
if (tokenAnnotation == null) return;
String tokenText = doc.normalizedText(tokenAnnotation).replaceAll(" ", "_");
Vector v = doc.annotationsAt(posn, "tagger");
Annotation a = (Annotation) v.get(0);
String pos = (String) a.get("cat");
tokens.add(new Token(tokenText, pos, tokenNum));
offset.add(posn);
if (posn >= tokenAnnotation.end()) {
break;
}
posn = tokenAnnotation.end();
}
Sentence sent = new Sentence(tokens);
// parse sentence
Arc[] arcs =
fsw.process(
sent,
tokens.size() > 0 && tokens.get(0).getPos() == null,
true,
true,
true,
true,
true)
.getParse()
.getHeadArcs();
// get dependencies
for (Arc arc : arcs) {
if (arc == null) continue;
if (arc.getDependency().equalsIgnoreCase("ROOT")) continue;
Token head = arc.getHead();
String headText = head.getText();
String headPos = head.getPos();
Integer headOffset = offset.get(head.getIndex());
Token dep = arc.getChild();
String depText = dep.getText();
String depPos = dep.getPos();
Integer depOffset = offset.get(dep.getIndex());
String type = arc.getDependency();
SyntacticRelation r =
new SyntacticRelation(headOffset, headText, headPos, type, depOffset, depText, depPos);
relations.add(r);
// System.out.println ("parseSentence: adding relation " + r);
}
}
