@Override
public void process(JCas aJCas) throws AnalysisEngineProcessException {
// Keeping track of the ranges of different relation candidates so we wont have duplicate
// text snippets for different candidates on the same text
Map<IndexRange, IndexRange> rangeMappings = new HashMap<IndexRange, IndexRange>();
if (aggregateJCas == null) aggregateJCas = getEmptyJCas();
CasCopier copier = new CasCopier(aJCas.getCas(), aggregateJCas.getCas());
Iterator<RelationCandidate> iter = JCasUtil.iterator(aJCas, RelationCandidate.class);
while (iter.hasNext()) {
RelationCandidate candidate = iter.next();
RelationCandidate candidateCopy = (RelationCandidate) copier.copyFs(candidate);
// See if we already have this candidate in the aggregate jcas
IndexRange candidateRange = new IndexRange(candidate);
// The offset between the old jcas and the new of this relation candidate
int offset = 0;
if (rangeMappings.containsKey(candidateRange)) {
offset = rangeMappings.get(candidateRange).getStart() - candidateRange.getStart();
updateAnnotation(candidateCopy, offset);
// No need to copy features, has already been done
} else {
offset = content.length() - candidateRange.getStart();
updateAnnotation(candidateCopy, offset);
rangeMappings.put(candidateRange, new IndexRange(candidateCopy));
// For every feature we want to copy
for (Class<? extends Annotation> feature : features) {
// Iterating over the annotations of this feature type covered by this relation candidate
for (Annotation annotation : JCasUtil.selectCovered(aJCas, feature, candidate)) {
Annotation cAnnotation = (Annotation) copier.copyFs(annotation);
// Updating the indices of the annotation
updateAnnotation(cAnnotation, offset);
aggregateJCas.addFsToIndexes(cAnnotation);
}
}
// Adding the text content of the relation candidate to the new cas
content.append(candidate.getCoveredText());
}
aggregateJCas.addFsToIndexes(candidateCopy);
}
}
