bundles/org.simantics.objmap2/src/org/simantics/objmap/structural/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.structural.rules.domain;
  13
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.Collections;
  17 import java.util.List;
  18
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21 import org.simantics.db.ReadGraph;
  22 import org.simantics.db.Resource;
  23 import org.simantics.db.WriteGraph;
  24 import org.simantics.db.common.utils.OrderedSetUtils;
  25 import org.simantics.db.exception.DatabaseException;
  26 import org.simantics.objmap.exceptions.MappingException;
  27 import org.simantics.objmap.graph.rules.domain.IDomainAccessor;
  28 import org.simantics.objmap.structural.StructuralResource;
  29
  30 public class RelatedOrderedSetElementsAccessor implements IDomainAccessor<StructuralResource, Collection<StructuralResource>> {
  31
  32     static Logger LOGGER = LoggerFactory.getLogger(RelatedOrderedSetElementsAccessor.class);
  33
  34         boolean deleteExtraObjects;
  35         boolean useTypeResource;
  36
  37         public RelatedOrderedSetElementsAccessor(boolean deleteExtraObjects, boolean useTypeResource) {
  38         super();
  39         this.deleteExtraObjects = deleteExtraObjects;
  40         this.useTypeResource = useTypeResource;
  41     }
  42
  43     @Override
  44         public Collection<StructuralResource> get(ReadGraph g, StructuralResource element) throws MappingException {
  45                 try {
  46                     LOGGER.info("        RelatedOrderedSetElementsAccessor.get");
  47                     Resource res = getServiceResource(g, element);
  48                     if (res == null)
  49                         return Collections.emptyList();
  50                         List<Resource> list =  OrderedSetUtils.toList(g, res);
  51                         List<StructuralResource> result = new ArrayList<StructuralResource>(list.size());
  52                         for (Resource r : list) {
  53                                 result.add(new StructuralResource(g,r,element.getContext()));
  54                         }
  55                         return result;
  56                 } catch (DatabaseException e) {
  57                         throw new MappingException(e);
  58                 }
  59         }
  60
  61         @Override
  62         public boolean set(WriteGraph g, StructuralResource element, Collection<StructuralResource> value)
  63                         throws MappingException {
  64                 try {
  65                     LOGGER.info("        RelatedOrderedSetElementsAccessor.set");
  66                     Resource res = getServiceResource(g, element);
  67                     if (res == null)
  68                         return false;
  69                     List<Resource> list = new ArrayList<Resource>(value.size());
  70                     for (StructuralResource r : value) {
  71                         list.add(r.getResource());
  72                     }
  73                     return OrderedSetUtils.set(g, res, list);
  74                     // FIXME Implement deleteExtraObjects
  75                 } catch (DatabaseException e) {
  76                         throw new MappingException(e);
  77                 }
  78
  79         }
  80
  81         private Resource getServiceResource(ReadGraph g, StructuralResource element) {
  82                 if (!useTypeResource)
  83                         return element.getResource();
  84                 return element.getTypeResource();
  85         }
  86
  87 }