Examples with LeftoversImpl eu.esdihumboldt.hale.common.align.model.transformation.tree.impl.LeftoversImpl used on opensource projects

Example 1 with LeftoversImpl

use of eu.esdihumboldt.hale.common.align.model.transformation.tree.impl.LeftoversImpl in project hale by halestudio.

the class InstanceVisitor method visit.

/**
 * @see AbstractSourceToTargetVisitor#visit(SourceNode)
 */
@Override
public boolean visit(SourceNode source) {
    if (source.getDefinition() instanceof TypeDefinition) {
        if (instance == null)
            return false;
        // source root
        if (source.getDefinition().equals(instance.getDefinition())) {
            // check type filter (if any)
            Filter filter = source.getEntityDefinition().getFilter();
            if (filter != null && !filter.match(instance)) {
                // instance does not match filter, don't descend further
                return false;
            /*
					 * XXX What about merged instances? Will this be OK for
					 * those? A type filter should only apply to the original
					 * instance if it is merged - but most filters should
					 * evaluate the same
					 */
            } else {
                // also sets the node to defined
                source.setValue(instance);
                for (FamilyInstance child : instance.getChildren()) {
                    // Find fitting SourceNodes.
                    Collection<SourceNode> candidateNodes = tree.getRootSourceNodes(child.getDefinition());
                    if (candidateNodes.isEmpty()) {
                        /*
							 * No node found - but this may be because no
							 * property of the type is mapped, but there still
							 * might be child instances (in a Join) that have
							 * types with associated relations. To prevent those
							 * being skipped we add an artificial node
							 * representing the instance.
							 */
                        candidateNodes = new ArrayList<>();
                        EntityDefinition entityDef = new TypeEntityDefinition(child.getDefinition(), SchemaSpaceID.SOURCE, null);
                        candidateNodes.add(new SourceNodeImpl(entityDef, null, false));
                    }
                    for (SourceNode candidateNode : candidateNodes) {
                        filter = candidateNode.getEntityDefinition().getFilter();
                        if (filter == null || filter.match(child)) {
                            // XXX add to all candidates!?
                            if (candidateNode.getValue() == null) {
                                candidateNode.setAnnotatedParent(source);
                                source.addAnnotatedChild(candidateNode);
                            } else {
                                // Duplicate here, because there is no
                                // guarantee, that the Duplication
                                // Visitor will visit candidateNode after
                                // this node.
                                SourceNodeImpl duplicateNode = new SourceNodeImpl(candidateNode.getEntityDefinition(), candidateNode.getParent(), false);
                                duplicateNode.setAnnotatedParent(source);
                                source.addAnnotatedChild(duplicateNode);
                                TransformationContext context = candidateNode.getContext();
                                duplicateNode.setContext(context);
                                if (context != null) {
                                    context.duplicateContext(candidateNode, duplicateNode, Collections.<Cell>emptySet(), log);
                                } else {
                                    /*
										 * Not sure what this really means if we
										 * get here.
										 * 
										 * Best guess: Probably that we weren't
										 * able to determine how the duplication
										 * of this source can be propagted to
										 * the target. Thus the duplicated node
										 * will probably not have any
										 * connection.
										 */
                                    log.warn(log.createMessage("No transformation context for duplicated node of source " + candidateNode.getDefinition().getDisplayName(), null));
                                }
                                candidateNode = duplicateNode;
                            }
                            // run instance visitor on that annotated child
                            InstanceVisitor visitor = new InstanceVisitor(child, tree, log);
                            candidateNode.accept(visitor);
                        }
                    }
                }
                return true;
            }
        } else
            return false;
    } else {
        Object parentValue = source.getParent().getValue();
        if (parentValue == null || !(parentValue instanceof Group)) {
            source.setDefined(false);
            return false;
        } else {
            Group parentGroup = (Group) parentValue;
            Definition<?> currentDef = source.getDefinition();
            Object[] values = parentGroup.getProperty(currentDef.getName());
            if (values == null) {
                source.setDefined(false);
                return false;
            }
            // check for contexts
            EntityDefinition entityDef = source.getEntityDefinition();
            // index context
            Integer index = AlignmentUtil.getContextIndex(entityDef);
            if (index != null) {
                // only use the value at the given index, if present
                if (index < values.length) {
                    // annotate with the value at the index
                    Object value = values[index];
                    source.setValue(value);
                    return true;
                } else {
                    source.setDefined(false);
                    return false;
                }
            }
            // condition context
            Condition condition = AlignmentUtil.getContextCondition(entityDef);
            if (condition != null) {
                if (condition.getFilter() == null) {
                    // assume exclusion
                    source.setDefined(false);
                    return false;
                }
                // apply condition as filter on values and continue with
                // those values
                Collection<Object> matchedValues = new ArrayList<Object>();
                for (Object value : values) {
                    // determine parent
                    Object parent = null;
                    SourceNode parentNode = source.getParent();
                    if (parentNode != null && parentNode.isDefined()) {
                        parent = parentNode.getValue();
                    }
                    // test the condition
                    if (AlignmentUtil.matchCondition(condition, value, parent)) {
                        matchedValues.add(value);
                    }
                }
                values = matchedValues.toArray();
            }
            // default behavior (default context)
            if (values.length >= 1) {
                // annotate with the first value
                Object value = values[0];
                source.setValue(value);
                source.setAllValues(values);
            } else {
                source.setDefined(false);
                return false;
            }
            if (values.length > 1) {
                // handle additional values
                Object[] leftovers = new Object[values.length - 1];
                System.arraycopy(values, 1, leftovers, 0, leftovers.length);
                source.setLeftovers(new LeftoversImpl(source, leftovers));
            }
            return true;
        }
    }
}