use of eu.esdihumboldt.hale.common.core.io.impl.LogProgressIndicator in project hale by halestudio.
the class InlineTransformation method evaluate.
@Override
protected Object evaluate(String transformationIdentifier, TransformationEngine engine, ListMultimap<String, PropertyValue> variables, String resultName, PropertyEntityDefinition resultProperty, Map<String, String> executionParameters, TransformationLog log) throws TransformationException, NoResultException {
List<PropertyValue> sources = variables.get(null);
if (sources.isEmpty()) {
throw new NoResultException("No source available to transform");
}
PropertyValue source = sources.get(0);
Object sourceValue = source.getValue();
if (sourceValue == null) {
throw new NoResultException("Source value is null");
}
if (!(sourceValue instanceof Instance)) {
throw new TransformationException("Sources for inline transformation must be instances");
}
Instance sourceInstance = (Instance) sourceValue;
TypeDefinition sourceType = sourceInstance.getDefinition();
// get the original alignment
Alignment orgAlignment = getExecutionContext().getAlignment();
MutableAlignment alignment = new DefaultAlignment(orgAlignment);
// identify relevant type cell(s)
MutableCell queryCell = new DefaultCell();
ListMultimap<String, Type> sourceEntities = ArrayListMultimap.create();
sourceEntities.put(null, new DefaultType(new TypeEntityDefinition(sourceType, SchemaSpaceID.SOURCE, null)));
queryCell.setSource(sourceEntities);
ListMultimap<String, Type> targetEntities = ArrayListMultimap.create();
targetEntities.put(null, new DefaultType(new TypeEntityDefinition(resultProperty.getDefinition().getPropertyType(), SchemaSpaceID.TARGET, null)));
queryCell.setTarget(targetEntities);
Collection<? extends Cell> candidates = alignment.getTypeCells(queryCell);
if (candidates.isEmpty()) {
log.error(log.createMessage("No type transformations found for inline transformation", null));
throw new NoResultException();
}
// filter alignment -> only keep relevant type relations
List<Cell> allTypeCells = new ArrayList<>(alignment.getTypeCells());
for (Cell cell : allTypeCells) {
// remove cell
alignment.removeCell(cell);
if (!cell.getTransformationMode().equals(TransformationMode.disabled)) {
// only readd if not disabled
MutableCell copy = new DefaultCell(cell);
if (candidates.contains(cell)) {
// readd as active
copy.setTransformationMode(TransformationMode.active);
} else {
// readd as passive
copy.setTransformationMode(TransformationMode.passive);
}
alignment.addCell(copy);
}
}
// prepare transformation input/output
DefaultInstanceCollection sourceInstances = new DefaultInstanceCollection();
sourceInstances.add(sourceInstance);
DefaultInstanceSink target = new DefaultInstanceSink();
// run transformation
TransformationService ts = getExecutionContext().getService(TransformationService.class);
if (ts == null) {
throw new TransformationException("Transformation service not available for inline transformation");
}
ProgressIndicator progressIndicator = new LogProgressIndicator();
TransformationReport report = ts.transform(alignment, sourceInstances, new ThreadSafeInstanceSink<InstanceSink>(target), getExecutionContext(), progressIndicator);
// copy report messages
log.importMessages(report);
if (!report.isSuccess()) {
// copy report messages
log.importMessages(report);
throw new TransformationException("Inline transformation failed");
}
// extract result
List<Instance> targetList = target.getInstances();
if (targetList.isEmpty()) {
log.error(log.createMessage("Inline transformation yielded no result", null));
throw new NoResultException("No result from inline transformation");
}
if (targetList.size() > 1) {
log.error(log.createMessage("Inline transformation yielded multiple results, only first result is used", null));
}
return targetList.get(0);
}
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