@Override
protected FeatureValue calcFeatureValue(Decorable di) {
// Feature applicable only to edges
if (!(di instanceof Edge)) {
throw new UnsupportedTypeException(
"Feature only defined for edges: " + di.getClass().getCanonicalName());
}
// Feature applicable only to binary edges
Edge e = (Edge) di;
if (e.numNodes() != 2) {
throw new UnsupportedTypeException("Feature only defined for binary edges: " + e.numNodes());
}
Iterator<Node> itr = e.getAllNodes();
Node n1 = itr.next();
Node n2 = itr.next();
FeatureValue fv1 = n1.getFeatureValue(fid);
FeatureValue fv2 = n2.getFeatureValue(fid);
if (fv1.equals(FeatureValue.UNKNOWN_VALUE) || fv2.equals(FeatureValue.UNKNOWN_VALUE)) {
return val0;
}
// If sparse value is specified and at least one value is not the sparse
// value, return 0.
if (commonvalue != null && fv1.equals(commonvalue)) {
return val0;
}
return fv1.getStringValue().equals(fv2.getStringValue()) ? val1 : val0;
}
