/**
* Adds <B>constit</B> annotations to an existing Document <CODE>doc</CODE> to represent the parse
* tree structure of a set of trees <CODE>trees</CODE>. This version is provided for parse tree
* files which include sentence offsets.
*
* @param trees list of parse trees
* @param offsets list of the starting position (in doc) of the text corresponding to each parse
* tree
* @param doc document to which annotations should be added
* @param targetAnnotation name of annotation to get 'parse' feature pointing to parse tree
* @param span target span.
* @param jetCategories if false, use lexical categories from Penn Tree Bank; if true, use
* categories from Jet
*/
public void addAnnotations(
List<ParseTreeNode> trees,
List<Integer> offsets,
Document doc,
String targetAnnotation,
Span span,
boolean jetCategories) {
if (trees.size() != offsets.size()) {
System.err.println(
"PTBReader.addAnnotations: mismatch between number of "
+ "trees ("
+ trees.size()
+ ") and number of offsets ("
+ offsets.size()
+ ")");
return;
}
for (int i = 0; i < trees.size(); i++) {
ParseTreeNode tree = trees.get(i);
int start = offsets.get(i);
if (start < 0) {
System.err.println("PTBReader.addAnnotations: offset missing for " + " parse tree " + i);
continue;
}
int end = (i + 1 == offsets.size()) ? span.end() : offsets.get(i + 1);
Span sentenceSpan = new Span(start, end);
addAnnotations(tree, doc, sentenceSpan, jetCategories);
Vector<Annotation> anns = doc.annotationsAt(start, targetAnnotation);
if (anns != null && anns.size() > 0) {
Annotation ann = anns.get(0);
ann.put("parse", tree.ann);
}
}
}
/**
* hides (adds the 'hidden' feature) to all annotations of type <I>type</I> beginning at the
* starting position of span <I>span</I>.
*/
public static void hideAnnotations(Document doc, String type, Span span) {
for (int posn = span.start(); posn < span.end(); posn++) {
Vector annotations = doc.annotationsAt(posn, type);
if (annotations != null) {
for (int i = 0; i < annotations.size(); i++) {
Annotation ann = (Annotation) annotations.elementAt(i);
ann.put("hidden", "true");
// Console.println ("Hiding " + ann);
}
}
}
}
/**
* Creates annotations for each node in parse tree <CODE>node</NODE>.
* These annotations are added to the parse tree and to the document
* <CODE>doc</CODE>. In constrast to <CODE>setAnnotations</CODE>,
* the categories used for terminal nodes are Jet categories obtained by
* Jet tokenization and lexical look-up. This means that hyphenated
* items are split, and multi-word names are reduced to a single node.
*
* @param node the root of the parse tree
* @param treeSpan the span of the document matching the parse tree
* @param doc the document to which annotations will be added
*/
private void setJetAnnotations(ParseTreeNode node, Span treeSpan, Document doc) {
StatParser.buildParserInput(doc, treeSpan.start(), treeSpan.end(), false);
StatParser.fixHyphenatedItems(doc);
int nameConstitEnd = -1;
List<ParseTreeNode> terminals = getTerminalNodes(node);
for (ParseTreeNode terminal : terminals) {
int terminalEnd = terminal.end;
// is there a 'name' constituent or 'hyphword' constituent here?
Vector<Annotation> constits = doc.annotationsAt(terminal.start, "constit");
Annotation constit = null;
Annotation nameConstit = null;
Annotation hyphword = null;
if (constits != null) {
for (Annotation c : constits) {
if (c.get("cat") == "name") {
nameConstit = c;
} else if (c.get("cat") == "hyphword") {
hyphword = c;
}
if (constit == null) constit = c;
}
}
if (hyphword != null) {
nameConstit = null;
constit = hyphword;
}
// if there is a name which is not part of a hyphword, associate the
// name with this (first) terminal node, and mark any remaining terminal
// nodes which match tokens in the name as empty
if (nameConstit != null) {
terminal.end = nameConstit.end();
terminal.ann = nameConstit;
nameConstitEnd = nameConstit.end();
} else if (nameConstitEnd >= 0) {
terminal.word = null;
} else {
Span span = new Span(terminal.start, terminal.end);
String pennPOS = ((String) terminal.category).toUpperCase().intern();
String word = terminal.word;
terminal.ann = StatParser.buildWordDefn(doc, word, span, constit, pennPOS);
}
if (nameConstitEnd == terminalEnd) nameConstitEnd = -1;
}
// prune parse tree: remove a node if it has no word or children
pruneTree(node);
determineNonTerminalSpans(node, treeSpan.start());
// add head links
if (hr == null) hr = HeadRule.createDefaultRule();
hr.apply(node);
// add annotations for non-terminals:
Jet.Parser.ParseTreeNode.makeParseAnnotations(doc, node);
}
/** 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);
}
}