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.slf4j.Logger;
  17 import org.slf4j.LoggerFactory;
  18 import org.simantics.db.ReadGraph;
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.WriteGraph;
  21 import org.simantics.db.common.utils.OrderedSetUtils;
  22 import org.simantics.db.exception.DatabaseException;
  23 import org.simantics.objmap.exceptions.MappingException;
  24
  25 /**
  26  * Accesses the set of objects attached to the element by the given relation.
  27  * @author Hannu Niemistö
  28  */
  29 public class RelatedOrderedSetElementsAccessor implements IDomainAccessor<Resource, Collection<Resource>> {
  30
  31     static Logger LOGGER = LoggerFactory.getLogger(RelatedOrderedSetElementsAccessor.class);
  32
  33         boolean deleteExtraObjects;
  34
  35         public RelatedOrderedSetElementsAccessor(boolean deleteExtraObjects) {
  36         super();
  37         this.deleteExtraObjects = deleteExtraObjects;
  38     }
  39
  40     @Override
  41         public Collection<Resource> get(ReadGraph g, Resource element) throws MappingException {
  42                 try {
  43                     LOGGER.info("        RelatedOrderedSetElementsAccessor.get");
  44                         return OrderedSetUtils.toList(g, element);
  45                 } catch (DatabaseException e) {
  46                         throw new MappingException(e);
  47                 }
  48         }
  49
  50         @Override
  51         public boolean set(WriteGraph g, Resource element, Collection<Resource> value)
  52                         throws MappingException {
  53                 try {
  54                     LOGGER.info("        RelatedOrderedSetElementsAccessor.set");
  55                     return OrderedSetUtils.set(g, element, value);
  56                     // FIXME Implement deleteExtraObjects
  57                 } catch (DatabaseException e) {
  58                         throw new MappingException(e);
  59                 }
  60
  61         }
  62
  63 }