gerrit.simantics Code Review - simantics/platform.git/blob

   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.exception.DatabaseException;
  21 import org.simantics.objmap.exceptions.MappingException;
  22
  23 /**
  24  * Accesses the set of objects attached to the element by the given relation.
  25  * @author Hannu Niemistö
  26  */
  27 public class RelatedObjectsAccessor implements IDomainAccessor<Resource,Collection<Resource>> {
  28
  29     static Logger LOGGER = Logger.getLogger("org.simantics.objmap");
  30
  31         Resource relation;
  32         boolean deleteExtraObjects;
  33
  34         public RelatedObjectsAccessor(Resource relation, boolean deleteExtraObjects) {
  35         super();
  36         this.relation = relation;
  37         this.deleteExtraObjects = deleteExtraObjects;
  38     }
  39
  40     @Override
  41         public Collection<Resource> get(ReadGraph g, Resource element) throws MappingException {
  42                 try {
  43                     LOGGER.info("        RelatedObjectsAccessor.get");
  44                         return g.getObjects(element, relation);
  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("        RelatedObjectsAccessor.set");
  55                         return MappingUtils.synchronizeStatements(g, element, relation,
  56                                 value.toArray(new Resource[value.size()]), deleteExtraObjects);
  57                 } catch (DatabaseException e) {
  58                         throw new MappingException(e);
  59                 }
  60
  61         }
  62
  63 }