/**
* Implementation for tests of fid -> fid unmapping.
*
* @param idExpression
* @throws Exception
*/
private void checkUnrollIdExpression(Expression idExpression) throws Exception {
AttributeMapping featureMapping = null;
Name featurePath = mapping.getTargetFeature().getName();
QName featureName = Types.toQName(featurePath);
for (Iterator it = mapping.getAttributeMappings().iterator(); it.hasNext(); ) {
AttributeMapping attMapping = (AttributeMapping) it.next();
StepList targetXPath = attMapping.getTargetXPath();
if (targetXPath.size() > 1) {
continue;
}
Step step = (Step) targetXPath.get(0);
if (featureName.equals(step.getName())) {
featureMapping = attMapping;
break;
}
}
featureMapping.setIdentifierExpression(idExpression);
this.visitor = new UnmappingFilterVisitor(this.mapping);
// retrieve a single sample feature
Feature sourceFeature = DataUtilities.first(mapping.getSource().getFeatures());
String fid = sourceFeature.getIdentifier().toString();
Id fidFilter = ff.id(Collections.singleton(ff.featureId(fid)));
Filter unrolled = (Filter) fidFilter.accept(visitor, null);
assertNotNull(unrolled);
assertTrue(unrolled instanceof Id);
FeatureCollection<SimpleFeatureType, SimpleFeature> results =
mapping.getSource().getFeatures(unrolled);
assertEquals(1, getCount(results));
SimpleFeature unmappedFeature = DataUtilities.first(results);
assertEquals(fid, unmappedFeature.getID());
}
