bundles/org.simantics.objmap2/src/org/simantics/objmap/structural/rules/domain/StructuralRelatedObjectsAccessor.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.apache.log4j.Logger;
  20 import org.simantics.db.ReadGraph;
  21 import org.simantics.db.Resource;
  22 import org.simantics.db.WriteGraph;
  23 import org.simantics.db.exception.DatabaseException;
  24 import org.simantics.objmap.exceptions.MappingException;
  25 import org.simantics.objmap.graph.rules.domain.IDomainAccessor;
  26 import org.simantics.objmap.graph.rules.domain.MappingUtils;
  27 import org.simantics.objmap.structural.StructuralResource;
  28
  29
  30 public class StructuralRelatedObjectsAccessor implements IDomainAccessor<StructuralResource,Collection<StructuralResource>> {
  31
  32     static Logger LOGGER = Logger.getLogger("org.simantics.objmap");
  33
  34         Resource relation;
  35         boolean deleteExtraObjects;
  36
  37         public StructuralRelatedObjectsAccessor(Resource relation, boolean deleteExtraObjects) {
  38         super();
  39         this.relation = relation;
  40         this.deleteExtraObjects = deleteExtraObjects;
  41     }
  42
  43     @Override
  44         public Collection<StructuralResource> get(ReadGraph g, StructuralResource element) throws MappingException {
  45                 try {
  46                     LOGGER.info("        RelatedObjectsAccessor.get");
  47
  48                     if (!element.isStructural())
  49                         return Collections.emptyList();
  50
  51                     // Structural instance
  52                     Resource instance = StructuralUtils.getContainingInstance(element);
  53
  54                     Resource publicRelation = StructuralUtils.getPublishedRelation(g, element, relation);
  55
  56                     if (publicRelation == null)
  57                       return Collections.emptyList();
  58
  59                     Collection<Resource> coll = g.getObjects(instance, publicRelation);
  60                         List<StructuralResource> result = new ArrayList<StructuralResource>(coll.size());
  61                         List<Resource> context = new ArrayList<Resource>();
  62                         for (int i = 0; i < element.getContext().size()-1; i++)
  63                                 context.add(element.getContext().get(i));
  64                         for (Resource r : coll) {
  65                                 if (StructuralUtils.isStructuralInstance(g, r)) {
  66                                         result.add(new StructuralResource(g, r, context,r));
  67                                 } else {
  68                                         result.add(new StructuralResource(g, r, context));
  69                                 }
  70                         }
  71                         return result;
  72                 } catch (DatabaseException e) {
  73                         throw new MappingException(e);
  74                 }
  75         }
  76
  77         @Override
  78         public boolean set(WriteGraph g, StructuralResource element, Collection<StructuralResource> value)
  79                         throws MappingException {
  80                 try {
  81                     LOGGER.info("        RelatedObjectsAccessor.set");
  82
  83                     if (!element.isStructural())
  84                         return false;
  85
  86                     Resource instance = StructuralUtils.getContainingInstance(element);
  87                     Resource publicRelation = null;
  88                     if (value.size() == 0) {
  89                         publicRelation = StructuralUtils.getPublishedRelation(g, element, relation);
  90                         if (publicRelation == null)
  91                                 return false;
  92                         else {
  93                                 return MappingUtils.synchronizeStatements(g, instance, publicRelation, new Resource[0], deleteExtraObjects);
  94                         }
  95                     } else {
  96                         publicRelation = StructuralUtils.getOrCreatePublishedRelation(g, element, relation);
  97                         if (publicRelation == null)
  98                                 throw new MappingException("Structural Resource " + element + " cannot contain structural elements, the Resource is not published.");
  99                             Resource[] arr = new Resource[value.size()];
 100                             int i = 0;
 101                             for (StructuralResource sr : value) {
 102                                 arr[i++] = sr.getResource();
 103                             }
 104                             return MappingUtils.synchronizeStatements(g, instance, publicRelation, arr, deleteExtraObjects);
 105                     }
 106
 107
 108
 109                 } catch (DatabaseException e) {
 110                         throw new MappingException(e);
 111                 }
 112
 113         }
 114
 115
 116 }