Examples with InstanceHandler eu.esdihumboldt.hale.common.align.transformation.function.InstanceHandler used on opensource projects

Example 1 with InstanceHandler

use of eu.esdihumboldt.hale.common.align.transformation.function.InstanceHandler in project hale by halestudio.

the class ConceptualSchemaTransformer method doTypeTransformation.

/**
 * Execute a type transformation based on single type cell
 *
 * @param transformation the transformation to use
 * @param typeCell the type cell
 * @param target the target instance sink
 * @param source the source instances
 * @param alignment the alignment
 * @param engines the engine manager
 * @param transformer the property transformer
 * @param context the transformation execution context
 * @param reporter the reporter
 * @param progressIndicator the progress indicator
 */
@SuppressWarnings({ "rawtypes", "unchecked" })
protected void doTypeTransformation(TypeTransformationFactory transformation, Cell typeCell, InstanceCollection source, InstanceSink target, Alignment alignment, EngineManager engines, PropertyTransformer transformer, TransformationContext context, TransformationReporter reporter, ProgressIndicator progressIndicator) {
    TransformationLog cellLog = new CellLog(reporter, typeCell);
    TypeTransformation<?> function;
    try {
        function = transformation.createExtensionObject();
    } catch (Exception e) {
        reporter.error(new TransformationMessageImpl(typeCell, "Error creating transformation function.", e));
        return;
    }
    TransformationEngine engine = engines.get(transformation.getEngineId(), cellLog);
    if (engine == null) {
        // TODO instead try another transformation
        cellLog.error(cellLog.createMessage("Skipping type transformation: No matching transformation engine found", null));
        return;
    }
    // prepare transformation configuration
    ListMultimap<String, Type> targetTypes = ArrayListMultimap.create();
    for (Entry<String, ? extends Entity> entry : typeCell.getTarget().entries()) {
        targetTypes.put(entry.getKey(), (Type) entry.getValue());
    }
    ListMultimap<String, ParameterValue> parameters = typeCell.getTransformationParameters();
    if (parameters != null) {
        parameters = Multimaps.unmodifiableListMultimap(parameters);
    }
    Map<String, String> executionParameters = transformation.getExecutionParameters();
    // break on cancel
    if (progressIndicator.isCanceled()) {
        return;
    }
    ResourceIterator<FamilyInstance> iterator;
    if (typeCell.getSource() == null || typeCell.getSource().isEmpty()) {
        // type cell w/o source
        // -> execute exactly once w/ null source
        source = null;
        iterator = new GenericResourceIteratorAdapter<Object, FamilyInstance>(Collections.singleton(null).iterator()) {

            @Override
            protected FamilyInstance convert(Object next) {
                return null;
            }
        };
    } else {
        // Step 1: selection
        // Select only instances that are relevant for the transformation.
        source = source.select(new TypeCellFilter(typeCell));
        // Step 2: partition
        // use InstanceHandler if available - for example merge or join
        function.setExecutionContext(context.getCellContext(typeCell));
        InstanceHandler instanceHandler = function.getInstanceHandler();
        if (instanceHandler != null) {
            injectTransformationContext(instanceHandler, context);
            progressIndicator.setCurrentTask("Perform instance partitioning");
            try {
                iterator = instanceHandler.partitionInstances(source, transformation.getFunctionId(), engine, parameters, executionParameters, cellLog);
            } catch (TransformationException e) {
                cellLog.error(cellLog.createMessage("Type transformation: partitioning failed", e));
                return;
            }
        } else {
            // else just use every instance as is
            iterator = new GenericResourceIteratorAdapter<Instance, FamilyInstance>(source.iterator()) {

                @Override
                protected FamilyInstance convert(Instance next) {
                    return new FamilyInstanceImpl(next);
                }
            };
        }
    }
    progressIndicator.setCurrentTask("Execute type transformations");
    try {
        while (iterator.hasNext()) {
            // break on cancel
            if (progressIndicator.isCanceled()) {
                return;
            }
            function.setSource(iterator.next());
            function.setPropertyTransformer(transformer);
            function.setParameters(parameters);
            function.setTarget(targetTypes);
            function.setExecutionContext(context.getCellContext(typeCell));
            try {
                ((TypeTransformation) function).execute(transformation.getFunctionId(), engine, executionParameters, cellLog, typeCell);
            } catch (TransformationException e) {
                cellLog.error(cellLog.createMessage("Type transformation failed, skipping instance.", e));
            }
        }
    } finally {
        iterator.close();
    }
}