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

Example 1 with PropertyTransformation

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

the class FunctionExecutor method executeTransformation.

/**
 * Execute a property transformation.
 *
 * @param transformation the transformation factory
 * @param cell the alignment cell
 * @param sources the named source entities and nodes
 * @param targets the named target entities and nodes
 */
@SuppressWarnings({ "rawtypes", "unchecked" })
protected void executeTransformation(PropertyTransformationFactory transformation, Cell cell, ListMultimap<String, Pair<SourceNode, Entity>> sources, ListMultimap<String, Pair<TargetNode, Entity>> targets) {
    TransformationLog cellLog = new CellLog(reporter, cell);
    PropertyTransformation<?> function;
    try {
        // TODO cache function objects?
        function = transformation.createExtensionObject();
    } catch (Exception e) {
        cellLog.error(cellLog.createMessage("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 property transformation: No matching transformation engine found", null));
        return;
    }
    // configure function
    // set expected result
    ListMultimap<String, PropertyEntityDefinition> expectedResult = ArrayListMultimap.create(targets.keySet().size(), 1);
    for (Entry<String, Pair<TargetNode, Entity>> targetEntry : targets.entries()) {
        EntityDefinition def = targetEntry.getValue().getSecond().getDefinition();
        expectedResult.put(targetEntry.getKey(), toPropertyEntityDefinition(def));
    }
    function.setExpectedResult(expectedResult);
    // set source variables
    ListMultimap<String, PropertyValue> variables = ArrayListMultimap.create();
    for (Entry<String, Pair<SourceNode, Entity>> sourceEntry : sources.entries()) {
        EntityDefinition def = sourceEntry.getValue().getSecond().getDefinition();
        SourceNode sourceNode = sourceEntry.getValue().getFirst();
        if (TransformationTreeUtil.isEager(cell, sourceNode, cellLog, context.getServiceProvider())) {
            // eager source - all values
            Object[] values = sourceNode.getAllValues();
            if (values != null) {
                for (int i = 0; i < values.length; i++) {
                    PropertyValue propertyValue = new PropertyValueImpl(values[i], toPropertyEntityDefinition(def));
                    variables.put(sourceEntry.getKey(), propertyValue);
                }
            }
        } else {
            // non-eager source - one value
            Object value = sourceNode.getValue();
            PropertyValue propertyValue = new PropertyValueImpl(value, toPropertyEntityDefinition(def));
            variables.put(sourceEntry.getKey(), propertyValue);
        }
    }
    function.setVariables(variables);
    // set parameters
    function.setParameters(cell.getTransformationParameters());
    // set context
    function.setExecutionContext(context.getCellContext(cell));
    // set target type
    TypeDefinition targetType = null;
    if (!targets.isEmpty()) {
        TargetNode target = targets.values().iterator().next().getFirst();
        targetType = target.getEntityDefinition().getType();
    }
    function.setTargetType(targetType);
    function.setTypeCell(typeCell.get());
    // execute function
    try {
        ((PropertyTransformation) function).execute(transformation.getIdentifier(), engine, transformation.getExecutionParameters(), cellLog, cell);
    } catch (Throwable e) {
        // TODO instead try another transformation?
        cellLog.error(cellLog.createMessage("Skipping property transformation: Executing property transformation failed.", e));
        return;
    }
    // apply function results
    ListMultimap<String, Object> results = function.getResults();
    if (results != null) {
        for (String name : results.keySet()) {
            List<Object> values = results.get(name);
            List<Pair<TargetNode, Entity>> nodes = targets.get(name);
            if (nodes.size() > values.size()) {
                cellLog.warn(cellLog.createMessage(MessageFormat.format("Transformation result misses values for result with name {0}", name), null));
            }
            if (values.size() > nodes.size()) {
                cellLog.warn(cellLog.createMessage(MessageFormat.format("More transformation results than target nodes for result with name {0}", name), null));
            }
            int count = Math.min(values.size(), nodes.size());
            // node...
            for (int i = 0; i < count; i++) {
                Object value = values.get(i);
                TargetNode node = nodes.get(i).getFirst();
                if (value instanceof MultiValue) {
                    MultiValue originalValue = (MultiValue) value;
                    MultiValue processedValue = new MultiValue(originalValue.size());
                    for (Object o : originalValue) {
                        processedValue.add(processValue(cellLog, function, o, node));
                    }
                    value = processedValue;
                } else {
                    value = processValue(cellLog, function, value, node);
                }
                /*
					 * TODO
					 * 
					 * set node value only if no result has already been set. If
					 * a value is already there and we are in a lower priority
					 * executor, we do not overwrite.
					 */
                if (!node.isDefined()) {
                    node.setResult(value);
                }
            }
        }
    }
}