bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/domain/RelatedOrderedSetElementsAccessor.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2013 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   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
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.objmap.graph.rules.domain;
  13
  14 import java.util.Collection;
  15
  16 import org.apache.log4j.Logger;
  17 import org.simantics.db.ReadGraph;
  18 import org.simantics.db.Resource;
  19 import org.simantics.db.WriteGraph;
  20 import org.simantics.db.common.utils.OrderedSetUtils;
  21 import org.simantics.db.exception.DatabaseException;
  22 import org.simantics.objmap.exceptions.MappingException;
  23
  24 /**
  25  * Accesses the set of objects attached to the element by the given relation.
  26  * @author Hannu Niemistö
  27  */
  28 public class RelatedOrderedSetElementsAccessor implements IDomainAccessor<Resource, Collection<Resource>> {
  29
  30     static Logger LOGGER = Logger.getLogger("org.simantics.objmap");
  31
  32         boolean deleteExtraObjects;
  33
  34         public RelatedOrderedSetElementsAccessor(boolean deleteExtraObjects) {
  35         super();
  36         this.deleteExtraObjects = deleteExtraObjects;
  37     }
  38
  39     @Override
  40         public Collection<Resource> get(ReadGraph g, Resource element) throws MappingException {
  41                 try {
  42                     LOGGER.info("        RelatedOrderedSetElementsAccessor.get");
  43                         return OrderedSetUtils.toList(g, element);
  44                 } catch (DatabaseException e) {
  45                         throw new MappingException(e);
  46                 }
  47         }
  48
  49         @Override
  50         public boolean set(WriteGraph g, Resource element, Collection<Resource> value)
  51                         throws MappingException {
  52                 try {
  53                     LOGGER.info("        RelatedOrderedSetElementsAccessor.set");
  54                     return OrderedSetUtils.set(g, element, value);
  55                     // FIXME Implement deleteExtraObjects
  56                 } catch (DatabaseException e) {
  57                         throw new MappingException(e);
  58                 }
  59
  60         }
  61
  62 }