public XBarGrammarProjection(BinaryGrammar bg, UnaryGrammar ug) {
Map<BinaryRule, BinaryRule> binaryRules = new HashMap<BinaryRule, BinaryRule>();
Map<UnaryRule, UnaryRule> unaryRules = new HashMap<UnaryRule, UnaryRule>();
sourceUG = ug;
sourceBG = bg;
sourceNumberer = Numberer.getGlobalNumberer(bg.stateSpace());
targetNumberer = Numberer.getGlobalNumberer(bg.stateSpace() + "-xbar");
projection = new int[sourceNumberer.total()];
scanStates(sourceNumberer, targetNumberer);
targetBG = new BinaryGrammar(targetNumberer.total(), bg.stateSpace() + "-xbar");
targetUG = new UnaryGrammar(targetNumberer.total());
for (Iterator<BinaryRule> brI = bg.iterator(); brI.hasNext(); ) {
BinaryRule rule = projectBinaryRule(brI.next());
Rule old = binaryRules.get(rule);
if (old == null || rule.score > old.score) {
binaryRules.put(rule, rule);
}
}
for (BinaryRule br : binaryRules.keySet()) {
targetBG.addRule(br);
// System.out.println("BR: "+targetNumberer.object(br.parent)+" ->
// "+targetNumberer.object(br.leftChild)+" "+targetNumberer.object(br.rightChild)+" %%
// "+br.score);
}
targetBG.splitRules();
for (int parent = 0; parent < sourceNumberer.total(); parent++) {
for (Iterator<UnaryRule> urI = ug.ruleIteratorByParent(parent); urI.hasNext(); ) {
UnaryRule sourceRule = urI.next();
UnaryRule rule = projectUnaryRule(sourceRule);
Rule old = unaryRules.get(rule);
if (old == null || rule.score > old.score) {
unaryRules.put(rule, rule);
}
/*
if (((UnaryRule)rule).child == targetNumberer.number("PRP") &&
((String)sourceNumberer.object(rule.parent)).charAt(0) == 'N') {
System.out.println("Source UR: "+sourceRule+" %% "+sourceRule.score);
System.out.println("Score of "+rule+"is now: "+((UnaryRule)unaryRules.get(rule)).score);
}
*/
}
}
for (UnaryRule ur : unaryRules.keySet()) {
targetUG.addRule(ur);
// System.out.println("UR: "+targetNumberer.object(ur.parent)+" ->
// "+targetNumberer.object(ur.child)+" %% "+ur.score);
}
targetUG.purgeRules();
System.out.println(
"Projected "
+ sourceNumberer.total()
+ " states to "
+ targetNumberer.total()
+ " states.");
}
