Examples with FEAT_REL_TARGET de.tudarmstadt.ukp.clarin.webanno.api.WebAnnoConst.FEAT_REL_TARGET used on opensource projects

Example 1 with FEAT_REL_TARGET

use of de.tudarmstadt.ukp.clarin.webanno.api.WebAnnoConst.FEAT_REL_TARGET in project webanno by webanno.

the class TypeSystemAnalysis method analyzeRelationLayer.

private Optional<RelationDetails> analyzeRelationLayer(TypeSystem aTS, Type aType) {
    // A UIMA type can be a relation layer if...
    // ... there are exactly two non-primitive features
    // ... both have the same range
    // ... the range is a span layer
    List<Feature> nonPrimitiveFeatures = aType.getFeatures().stream().filter(f -> !isBuiltInFeature(f)).filter(f -> !f.getRange().isPrimitive()).collect(Collectors.toList());
    // ... there are exactly two non-primitive features
    if (nonPrimitiveFeatures.size() != 2) {
        return Optional.empty();
    }
    Feature ref1 = nonPrimitiveFeatures.get(0);
    Feature ref2 = nonPrimitiveFeatures.get(1);
    // Relations must use the names "Governor" and "Dependent" for its references because
    // these names are hardcoded throughout WebAnno.
    List<String> validNames = asList(FEAT_REL_SOURCE, FEAT_REL_TARGET);
    if (!validNames.contains(ref1.getShortName()) || !validNames.contains(ref2.getShortName())) {
        return Optional.empty();
    }
    // ... both have the same range
    if (!ref1.getRange().getName().equals(ref2.getRange().getName())) {
        return Optional.empty();
    }
    // Annotation should be fine.
    if (!aTS.subsumes(aTS.getType(CAS.TYPE_NAME_ANNOTATION), ref1.getRange())) {
        return Optional.empty();
    }
    RelationDetails details = new RelationDetails();
    details.attachLayer = ref1.getRange().getName();
    details.sourceFeature = WebAnnoConst.FEAT_REL_SOURCE;
    details.targetFeature = WebAnnoConst.FEAT_REL_TARGET;
    // Hm, ok, so this looks like a relation layer.
    return Optional.of(details);
}