private Pair <IList <ICoreMap>, IList <T> > ApplyCompositeRule <_T0>(SequenceMatchRules.IExtractRule <IList <ICoreMap>, T> compositeExtractRule, IList <_T0> merged, IList <T> matchedExpressions, int limit)
where _T0 : ICoreMap
{
// Apply higher order rules
bool done = false;
// Limit of number of times rules are applied just in case
int maxIters = limit;
int iters = 0;
while (!done)
{
IList <T> newExprs = new List <T>();
bool extracted = compositeExtractRule.Extract(merged, newExprs);
if (verbose && extracted)
{
log.Info("applyCompositeRule() extracting with " + compositeExtractRule + " from " + merged + " gives " + newExprs);
}
if (extracted)
{
AnnotateExpressions(merged, newExprs);
newExprs = MatchedExpression.RemoveNullValues(newExprs);
if (!newExprs.IsEmpty())
{
newExprs = MatchedExpression.RemoveNested(newExprs);
newExprs = MatchedExpression.RemoveOverlapping(newExprs);
merged = MatchedExpression.ReplaceMerged(merged, newExprs);
// Favor newly matched expressions over older ones
Sharpen.Collections.AddAll(newExprs, matchedExpressions);
matchedExpressions = MatchedExpression.RemoveNested(newExprs);
matchedExpressions = MatchedExpression.RemoveOverlapping(matchedExpressions);
}
else
{
extracted = false;
}
}
done = !extracted;
iters++;
if (maxIters > 0 && iters >= maxIters)
{
if (verbose)
{
log.Warn("Aborting application of composite rules: Maximum iteration " + maxIters + " reached");
}
break;
}
}
return(new Pair <IList <ICoreMap>, IList <T> >(merged, matchedExpressions));
}
public virtual IList <T> ExtractExpressions(ICoreMap annotation)
{
// Extract potential expressions
IList <T> matchedExpressions = new List <T>();
IList <int> stageIds = new List <int>(stages.Keys);
stageIds.Sort();
foreach (int stageId in stageIds)
{
CoreMapExpressionExtractor.Stage <T> stage = stages[stageId];
SequenceMatchRules.IExtractRule <ICoreMap, T> basicExtractRule = stage.basicExtractRule;
if (stage.clearMatched)
{
matchedExpressions.Clear();
}
if (basicExtractRule != null)
{
basicExtractRule.Extract(annotation, matchedExpressions);
if (verbose && matchedExpressions != null)
{
log.Info("extractExpressions() extracting with " + basicExtractRule + " from " + annotation + " gives " + matchedExpressions);
}
AnnotateExpressions(annotation, matchedExpressions);
matchedExpressions = MatchedExpression.RemoveNullValues(matchedExpressions);
matchedExpressions = MatchedExpression.RemoveNested(matchedExpressions);
matchedExpressions = MatchedExpression.RemoveOverlapping(matchedExpressions);
}
IList <ICoreMap> merged = MatchedExpression.ReplaceMergedUsingTokenOffsets(annotation.Get(tokensAnnotationKey), matchedExpressions);
SequenceMatchRules.IExtractRule <IList <ICoreMap>, T> compositeExtractRule = stage.compositeExtractRule;
if (compositeExtractRule != null)
{
Pair <IList <ICoreMap>, IList <T> > p = ApplyCompositeRule(compositeExtractRule, merged, matchedExpressions, stage.limitIters);
merged = p.First();
matchedExpressions = p.Second();
}
matchedExpressions = FilterInvalidExpressions(stage.filterRule, matchedExpressions);
}
matchedExpressions.Sort(MatchedExpression.ExprTokenOffsetsNestedFirstComparator);
if (!keepTags)
{
CleanupTags(annotation);
}
return(matchedExpressions);
}