protected override Parse[] AdvanceParses(Parse p, double probMass)
{
var q = 1 - probMass;
/** The index of the node which will be labeled in this iteration of advancing the parse. */
int advanceNodeIndex;
/** The node which will be labeled in this iteration of advancing the parse. */
Parse advanceNode = null;
var originalChildren = p.Children;
var children = CollapsePunctuation(originalChildren, punctSet);
var numNodes = children.Length;
if (numNodes == 0)
{
return(null);
}
if (numNodes == 1)
{
//put sentence initial and final punct in top node
if (children[0].IsPosTag)
{
return(null);
}
p.ExpandTopNode(children[0]);
return(new[] { p });
}
//determines which node needs to advanced.
for (advanceNodeIndex = 0; advanceNodeIndex < numNodes; advanceNodeIndex++)
{
advanceNode = children[advanceNodeIndex];
if (!IsBuilt(advanceNode))
{
break;
}
}
if (advanceNode == null)
{
throw new InvalidOperationException("advanceNode is null.");
}
var originalZeroIndex = MapParseIndex(0, children, originalChildren);
var originalAdvanceIndex = MapParseIndex(advanceNodeIndex, children, originalChildren);
var newParsesList = new List <Parse>();
//call build model
buildModel.Eval(buildContextGenerator.GetContext(children, advanceNodeIndex), bProbs);
var doneProb = bProbs[doneIndex];
Debug("adi=" + advanceNodeIndex + " " + advanceNode.Type + "." + advanceNode.Label + " " + advanceNode + " choose build=" + (1 - doneProb) + " attach=" + doneProb);
if (1 - doneProb > q)
{
double bprobSum = 0;
while (bprobSum < probMass)
{
/** The largest un advanced labeling. */
var max = 0;
for (var pi = 1; pi < bProbs.Length; pi++)
{
//for each build outcome
if (bProbs[pi] > bProbs[max])
{
max = pi;
}
}
if (bProbs[max].Equals(0d))
{
break;
}
var bprob = bProbs[max];
bProbs[max] = 0; //zero out so new max can be found
bprobSum += bprob;
var tag = buildModel.GetOutcome(max);
if (!tag.Equals(DONE))
{
var newParse1 = (Parse)p.Clone();
var newNode = new Parse(p.Text, advanceNode.Span, tag, bprob, advanceNode.Head);
newParse1.Insert(newNode);
newParse1.AddProbability(Math.Log(bprob));
newParsesList.Add(newParse1);
if (checkComplete)
{
cProbs =
checkModel.Eval(checkContextGenerator.GetContext(newNode, children, advanceNodeIndex,
false));
Debug("building " + tag + " " + bprob + " c=" + cProbs[completeIndex]);
if (cProbs[completeIndex] > probMass)
{
//just complete advances
SetComplete(newNode);
newParse1.AddProbability(Math.Log(cProbs[completeIndex]));
Debug("Only advancing complete node");
}
else if (1 - cProbs[completeIndex] > probMass)
{
//just incomplete advances
SetIncomplete(newNode);
newParse1.AddProbability(Math.Log(1 - cProbs[completeIndex]));
Debug("Only advancing incomplete node");
}
else
{
//both complete and incomplete advance
Debug("Advancing both complete and incomplete nodes");
SetComplete(newNode);
newParse1.AddProbability(Math.Log(cProbs[completeIndex]));
var newParse2 = (Parse)p.Clone();
var newNode2 = new Parse(p.Text, advanceNode.Span, tag, bprob, advanceNode.Head);
newParse2.Insert(newNode2);
newParse2.AddProbability(Math.Log(bprob));
newParsesList.Add(newParse2);
newParse2.AddProbability(Math.Log(1 - cProbs[completeIndex]));
SetIncomplete(newNode2); //set incomplete for non-clone
}
}
else
{
Debug("building " + tag + " " + bprob);
}
}
}
}
//advance attaches
if (doneProb > q)
{
var newParse1 = (Parse)p.Clone(); //clone parse
//mark nodes as built
if (checkComplete)
{
if (IsComplete(advanceNode))
{
newParse1.SetChild(originalAdvanceIndex, BUILT + "." + COMPLETE);
//replace constituent being labeled to create new derivation
}
else
{
newParse1.SetChild(originalAdvanceIndex, BUILT + "." + INCOMPLETE);
//replace constituent being labeled to create new derivation
}
}
else
{
newParse1.SetChild(originalAdvanceIndex, BUILT);
//replace constituent being labeled to create new derivation
}
newParse1.AddProbability(Math.Log(doneProb));
if (advanceNodeIndex == 0)
{
//no attach if first node.
newParsesList.Add(newParse1);
}
else
{
var rf = GetRightFrontier(p, punctSet);
for (int fi = 0, fs = rf.Count; fi < fs; fi++)
{
var fn = rf[fi];
attachModel.Eval(attachContextGenerator.GetContext(children, advanceNodeIndex, rf, fi), aProbs);
if (debugOn)
{
//List cs = java.util.Arrays.asList(attachContextGenerator.getContext(children, advanceNodeIndex,rf,fi,punctSet));
Debug("Frontier node(" + fi + "): " + fn.Type + "." + fn.Label + " " + fn + " <- " +
advanceNode.Type + " " + advanceNode + " d=" + aProbs[daughterAttachIndex] + " s=" +
aProbs[sisterAttachIndex] + " ");
}
foreach (int attachment in attachments)
{
var prob = aProbs[attachment];
//should we try an attach if p > threshold and
// if !checkComplete then prevent daughter attaching to chunk
// if checkComplete then prevent daughter attaching to complete node or
// sister attaching to an incomplete node
if (prob > q && (
(!checkComplete && (attachment != daughterAttachIndex || !IsComplete(fn)))
||
(checkComplete &&
((attachment == daughterAttachIndex && !IsComplete(fn)) ||
(attachment == sisterAttachIndex && IsComplete(fn))))))
{
var newParse2 = newParse1.CloneRoot(fn, originalZeroIndex);
var newKids = CollapsePunctuation(newParse2.Children, punctSet);
//remove node from top level since were going to attach it (including punct)
for (var ri = originalZeroIndex + 1; ri <= originalAdvanceIndex; ri++)
{
//System.out.println(at"-removing "+(originalZeroIndex+1)+" "+newParse2.getChildren()[originalZeroIndex+1]);
newParse2.Remove(originalZeroIndex + 1);
}
var crf = GetRightFrontier(newParse2, punctSet);
Parse updatedNode;
if (attachment == daughterAttachIndex)
{
//attach daughter
updatedNode = crf[fi];
updatedNode.Add(advanceNode, headRules);
}
else
{
//attach sister
Parse psite;
if (fi + 1 < crf.Count)
{
psite = crf[fi + 1];
updatedNode = psite.AdJoin(advanceNode, headRules);
}
else
{
psite = newParse2;
updatedNode = psite.AdJoinRoot(advanceNode, headRules, originalZeroIndex);
newKids[0] = updatedNode;
}
}
//update spans affected by attachment
for (var ni = fi + 1; ni < crf.Count; ni++)
{
var node = crf[ni];
node.UpdateSpan();
}
//if (debugOn) {System.out.print(ai+"-result: ");newParse2.show();System.out.println();}
newParse2.AddProbability(Math.Log(prob));
newParsesList.Add(newParse2);
if (checkComplete)
{
cProbs =
checkModel.Eval(checkContextGenerator.GetContext(updatedNode, newKids,
advanceNodeIndex, true));
if (cProbs[completeIndex] > probMass)
{
SetComplete(updatedNode);
newParse2.AddProbability(Math.Log(cProbs[completeIndex]));
Debug("Only advancing complete node");
}
else if (1 - cProbs[completeIndex] > probMass)
{
SetIncomplete(updatedNode);
newParse2.AddProbability(Math.Log(1 - cProbs[completeIndex]));
Debug("Only advancing incomplete node");
}
else
{
SetComplete(updatedNode);
var newParse3 = newParse2.CloneRoot(updatedNode, originalZeroIndex);
newParse3.AddProbability(Math.Log(cProbs[completeIndex]));
newParsesList.Add(newParse3);
SetIncomplete(updatedNode);
newParse2.AddProbability(Math.Log(1 - cProbs[completeIndex]));
Debug("Advancing both complete and incomplete nodes; c=" + cProbs[completeIndex]);
}
}
}
else
{
Debug("Skipping " + fn.Type + "." + fn.Label + " " + fn + " daughter=" +
(attachment == daughterAttachIndex) + " complete=" + IsComplete(fn) +
" prob=" + prob);
}
}
if (checkComplete && !IsComplete(fn))
{
Debug("Stopping at incomplete node(" + fi + "): " + fn.Type + "." + fn.Label + " " + fn);
break;
}
}
}
}
return(newParsesList.ToArray());
}
/// <summary>
/// Produces all events for the specified sentence chunks and adds them to the specified list.
/// </summary>
/// <param name="newEvents">A list of events to be added to.</param>
/// <param name="chunks">Pre-chunked constituents of a sentence.</param>
protected override void AddParseEvents(List <Event> newEvents, Parse[] chunks)
{
/* Frontier nodes built from node in a completed parse. Specifically,
* they have all their children regardless of the stage of parsing.*/
var rightFrontier = new List <Parse>();
var builtNodes = new List <Parse>();
/* Nodes which characterize what the parse looks like to the parser as its being built.
* Specifically, these nodes don't have all their children attached like the parents of
* the chunk nodes do.*/
var currentChunks = new Parse[chunks.Length];
for (var ci = 0; ci < chunks.Length; ci++)
{
currentChunks[ci] = (Parse)chunks[ci].Clone();
currentChunks[ci].PreviousPunctuationSet = chunks[ci].PreviousPunctuationSet;
currentChunks[ci].NextPunctuationSet = chunks[ci].NextPunctuationSet;
currentChunks[ci].Label = AbstractBottomUpParser.COMPLETE;
chunks[ci].Label = AbstractBottomUpParser.COMPLETE;
}
for (var ci = 0; ci < chunks.Length; ci++)
{
//System.err.println("parserEventStream.addParseEvents: chunks="+Arrays.asList(chunks));
var parent = chunks[ci].Parent;
var prevParent = chunks[ci];
//var off = 0;
//build un-built parents
if (!chunks[ci].IsPosTag)
{
builtNodes.Add(chunks[ci]);
//builtNodes[off++] = chunks[ci];
}
//perform build stages
while (parent.Type != AbstractBottomUpParser.TOP_NODE && parent.Label == null)
{
if (parent.Label == null && prevParent.Type != parent.Type)
{
//build level
// if (debug) System.err.println("Build: " + parent.Type + " for: " + currentChunks[ci]);
if (Type == ParserEventTypeEnum.Build)
{
newEvents.Add(new Event(parent.Type, buildContextGenerator.GetContext(currentChunks, ci)));
}
builtNodes.Add(parent);
//builtNodes[off++] = parent;
var newParent = new Parse(currentChunks[ci].Text, currentChunks[ci].Span, parent.Type, 1, 0);
newParent.Add(currentChunks[ci], Rules);
newParent.PreviousPunctuationSet = currentChunks[ci].PreviousPunctuationSet;
newParent.NextPunctuationSet = currentChunks[ci].NextPunctuationSet;
currentChunks[ci].Parent = newParent;
currentChunks[ci] = newParent;
newParent.Label = Parser.BUILT;
//see if chunk is complete
if (LastChild(chunks[ci], parent))
{
if (Type == ParserEventTypeEnum.Check)
{
newEvents.Add(new Event(AbstractBottomUpParser.COMPLETE,
checkContextGenerator.GetContext(currentChunks[ci], currentChunks, ci, false)));
}
currentChunks[ci].Label = AbstractBottomUpParser.COMPLETE;
parent.Label = AbstractBottomUpParser.COMPLETE;
}
else
{
if (Type == ParserEventTypeEnum.Check)
{
newEvents.Add(new Event(AbstractBottomUpParser.INCOMPLETE,
checkContextGenerator.GetContext(currentChunks[ci], currentChunks, ci, false)));
}
currentChunks[ci].Label = AbstractBottomUpParser.INCOMPLETE;
parent.Label = AbstractBottomUpParser.COMPLETE;
}
chunks[ci] = parent;
//System.err.println("build: "+newParent+" for "+parent);
}
//TODO: Consider whether we need to set this label or train parses at all.
parent.Label = Parser.BUILT;
prevParent = parent;
parent = parent.Parent;
}
//decide to attach
if (Type == ParserEventTypeEnum.Build)
{
newEvents.Add(new Event(Parser.DONE, buildContextGenerator.GetContext(currentChunks, ci)));
}
//attach node
string attachType = null;
/* Node selected for attachment. */
Parse attachNode = null;
var attachNodeIndex = -1;
if (ci == 0)
{
var top = new Parse(currentChunks[ci].Text, new Span(0, currentChunks[ci].Text.Length),
AbstractBottomUpParser.TOP_NODE, 1, 0);
top.Insert(currentChunks[ci]);
}
else
{
/* Right frontier consisting of partially-built nodes based on current state of the parse.*/
var currentRightFrontier = Parser.GetRightFrontier(currentChunks[0], Punctuation);
if (currentRightFrontier.Count != rightFrontier.Count)
{
throw new InvalidOperationException("frontiers mis-aligned: " + currentRightFrontier.Count +
" != " + rightFrontier.Count + " " + currentRightFrontier +
" " + rightFrontier);
//System.exit(1);
}
var parents = GetNonAdjoinedParent(chunks[ci]);
//try daughters first.
for (var cfi = 0; cfi < currentRightFrontier.Count; cfi++)
{
var frontierNode = rightFrontier[cfi];
var cfn = currentRightFrontier[cfi];
if (!Parser.checkComplete || cfn.Label != AbstractBottomUpParser.COMPLETE)
{
//if (debug) System.err.println("Looking at attachment site (" + cfi + "): " + cfn.Type + " ci=" + i + " cs=" + nonPunctChildCount(cfn) + ", " + cfn + " :for " + currentChunks[ci].Type + " " + currentChunks[ci] + " -> " + parents);
if (parents.ContainsKey(frontierNode) && attachNode == null && parents[frontierNode] == NonPunctChildCount(cfn))
{
attachType = Parser.ATTACH_DAUGHTER;
attachNodeIndex = cfi;
attachNode = cfn;
if (Type == ParserEventTypeEnum.Attach)
{
newEvents.Add(new Event(attachType,
attachContextGenerator.GetContext(currentChunks, ci, currentRightFrontier,
attachNodeIndex)));
}
//System.err.println("daughter attach "+attachNode+" at "+fi);
}
} /* else {
* if (debug) System.err.println("Skipping (" + cfi + "): " + cfn.Type + "," + cfn.getPreviousPunctuationSet() + " " + cfn + " :for " + currentChunks[ci].Type + " " + currentChunks[ci] + " -> " + parents);
* }
* // Can't attach past first incomplete node.
* if (Parser.checkComplete && cfn.getLabel().equals(Parser.INCOMPLETE)) {
* if (debug) System.err.println("breaking on incomplete:" + cfn.Type + " " + cfn);
* break;
* }
*/
}
//try sisters, and generate non-attach events.
for (var cfi = 0; cfi < currentRightFrontier.Count; cfi++)
{
var frontierNode = rightFrontier[cfi];
var cfn = currentRightFrontier[cfi];
if (attachNode == null && parents.ContainsKey(frontierNode.Parent) &&
frontierNode.Type.Equals(frontierNode.Parent.Type)
)
{
//&& frontierNode.Parent.getLabel() == null) {
attachType = Parser.ATTACH_SISTER;
attachNode = cfn;
attachNodeIndex = cfi;
if (Type == ParserEventTypeEnum.Attach)
{
newEvents.Add(new Event(Parser.ATTACH_SISTER,
attachContextGenerator.GetContext(currentChunks, ci, currentRightFrontier, cfi)));
}
chunks[ci].Parent.Label = Parser.BUILT;
//System.err.println("in search sister attach "+attachNode+" at "+cfi);
}
else if (cfi == attachNodeIndex)
{
//skip over previously attached daughter.
}
else
{
if (Type == ParserEventTypeEnum.Attach)
{
newEvents.Add(new Event(Parser.NON_ATTACH,
attachContextGenerator.GetContext(currentChunks, ci, currentRightFrontier, cfi)));
}
}
//Can't attach past first incomplete node.
if (Parser.checkComplete && cfn.Label.Equals(AbstractBottomUpParser.INCOMPLETE))
{
//if (debug) System.err.println("breaking on incomplete:" + cfn.Type + " " + cfn);
break;
}
}
//attach Node
if (attachNode != null)
{
if (attachType == Parser.ATTACH_DAUGHTER)
{
var daughter = currentChunks[ci];
//if (debug) System.err.println("daughter attach a=" + attachNode.Type + ":" + attachNode + " d=" + daughter + " com=" + lastChild(chunks[ci], rightFrontier.get(attachNodeIndex)));
attachNode.Add(daughter, Rules);
daughter.Parent = attachNode;
if (LastChild(chunks[ci], rightFrontier[attachNodeIndex]))
{
if (Type == ParserEventTypeEnum.Check)
{
newEvents.Add(new Event(AbstractBottomUpParser.COMPLETE,
checkContextGenerator.GetContext(attachNode, currentChunks, ci, true)));
}
attachNode.Label = AbstractBottomUpParser.COMPLETE;
}
else
{
if (Type == ParserEventTypeEnum.Check)
{
newEvents.Add(new Event(AbstractBottomUpParser.INCOMPLETE,
checkContextGenerator.GetContext(attachNode, currentChunks, ci, true)));
}
}
}
else if (attachType == Parser.ATTACH_SISTER)
{
var frontierNode = rightFrontier[attachNodeIndex];
rightFrontier[attachNodeIndex] = frontierNode.Parent;
var sister = currentChunks[ci];
//if (debug) System.err.println("sister attach a=" + attachNode.Type + ":" + attachNode + " s=" + sister + " ap=" + attachNode.Parent + " com=" + lastChild(chunks[ci], rightFrontier.get(attachNodeIndex)));
var newParent = attachNode.Parent.AdJoin(sister, Rules);
newParent.Parent = attachNode.Parent;
attachNode.Parent = newParent;
sister.Parent = newParent;
if (Equals(attachNode, currentChunks[0]))
{
currentChunks[0] = newParent;
}
if (LastChild(chunks[ci], rightFrontier[attachNodeIndex]))
{
if (Type == ParserEventTypeEnum.Check)
{
newEvents.Add(new Event(AbstractBottomUpParser.COMPLETE,
checkContextGenerator.GetContext(newParent, currentChunks, ci, true)));
}
newParent.Label = AbstractBottomUpParser.COMPLETE;
}
else
{
if (Type == ParserEventTypeEnum.Check)
{
newEvents.Add(new Event(AbstractBottomUpParser.INCOMPLETE,
checkContextGenerator.GetContext(newParent, currentChunks, ci, true)));
}
newParent.Label = AbstractBottomUpParser.INCOMPLETE;
}
}
//update right frontier
for (var ni = 0; ni < attachNodeIndex; ni++)
{
//System.err.println("removing: "+rightFrontier.get(0));
rightFrontier.RemoveAt(0);
}
}
else
{
//System.err.println("No attachment!");
throw new InvalidOperationException("No Attachment: " + chunks[ci]);
}
}
rightFrontier.InsertRange(0, builtNodes);
builtNodes.Clear();
}
}
