1 /*******************************************************************************
2 * Copyright (c) 2007, 2013 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.objmap.graph.annotations.factories;
14 import java.lang.annotation.Annotation;
15 import java.lang.reflect.Field;
16 import java.util.Collection;
17 import java.util.Collections;
19 import org.simantics.db.ReadGraph;
20 import org.simantics.db.Resource;
21 import org.simantics.db.exception.ResourceNotFoundException;
22 import org.simantics.db.exception.ServiceException;
23 import org.simantics.db.exception.ValidationException;
24 import org.simantics.objmap.bidirectional.IBidirectionalMappingRule;
25 import org.simantics.objmap.graph.annotations.OptionalRelatedElements;
26 import org.simantics.objmap.graph.rules.MappedElementsRule;
27 import org.simantics.objmap.graph.rules.domain.RelatedObjectsAccessor;
28 import org.simantics.objmap.graph.rules.factory.IFieldRuleFactory;
29 import org.simantics.objmap.graph.rules.range.FieldAccessorWithDefault;
32 public class OptionalRelatedElementsRuleFactory<Range> implements IFieldRuleFactory<Resource, Range> {
35 public IBidirectionalMappingRule<Resource, Range> create(ReadGraph g, Annotation _annotation, Field field) throws ResourceNotFoundException, ValidationException, ServiceException {
36 OptionalRelatedElements annotation = (OptionalRelatedElements)_annotation;
37 return new MappedElementsRule<Resource, Range>(
38 new RelatedObjectsAccessor(g.getResource(annotation.value()),
39 annotation.composition()),
40 new FieldAccessorWithDefault<Range,Collection<Range>>(field, Collections.<Range>emptyList())