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