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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2013 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.objmap.graph.rules.domain;\r
  13 \r
  14 import java.util.Collection;\r
  15 \r
  16 import org.apache.log4j.Logger;\r
  17 import org.simantics.db.ReadGraph;\r
  18 import org.simantics.db.Resource;\r
  19 import org.simantics.db.WriteGraph;\r
  20 import org.simantics.db.exception.DatabaseException;\r
  21 import org.simantics.objmap.exceptions.MappingException;\r
  22 \r
  23 /**\r
  24  * Accesses the set of objects attached to the element by the given relation.\r
  25  * @author Hannu Niemistö\r
  26  */\r
  27 public class RelatedObjectsAccessor implements IDomainAccessor<Resource,Collection<Resource>> {\r
  28 \r
  29     static Logger LOGGER = Logger.getLogger("org.simantics.objmap");\r
  30     \r
  31         Resource relation;\r
  32         boolean deleteExtraObjects;\r
  33 \r
  34         public RelatedObjectsAccessor(Resource relation, boolean deleteExtraObjects) {\r
  35         super();\r
  36         this.relation = relation;\r
  37         this.deleteExtraObjects = deleteExtraObjects;\r
  38     }\r
  39 \r
  40     @Override\r
  41         public Collection<Resource> get(ReadGraph g, Resource element) throws MappingException {\r
  42                 try {\r
  43                     LOGGER.info("        RelatedObjectsAccessor.get");\r
  44                         return g.getObjects(element, relation);\r
  45                 } catch (DatabaseException e) {\r
  46                         throw new MappingException(e);\r
  47                 }\r
  48         }\r
  49         \r
  50         @Override\r
  51         public boolean set(WriteGraph g, Resource element, Collection<Resource> value)\r
  52                         throws MappingException {\r
  53                 try {\r
  54                     LOGGER.info("        RelatedObjectsAccessor.set");\r
  55                         return MappingUtils.synchronizeStatements(g, element, relation, \r
  56                                 value.toArray(new Resource[value.size()]), deleteExtraObjects);\r
  57                 } catch (DatabaseException e) {\r
  58                         throw new MappingException(e);\r
  59                 }\r
  60                 \r
  61         }\r
  62 \r
  63 }\r