bundles/org.simantics.structural2/src/org/simantics/structural2/queries/ConnectionPointMapOfResource.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 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.structural2.queries;\r
  13 \r
  14 import gnu.trove.map.hash.THashMap;\r
  15 \r
  16 import java.util.Collection;\r
  17 import java.util.Collections;\r
  18 import java.util.Map;\r
  19 \r
  20 import org.simantics.db.ReadGraph;\r
  21 import org.simantics.db.Resource;\r
  22 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;\r
  23 import org.simantics.db.common.request.TransientResourceRead;\r
  24 import org.simantics.db.exception.DatabaseException;\r
  25 import org.simantics.db.layer0.request.PropertyInfo;\r
  26 import org.simantics.db.request.RequestFlags;\r
  27 import org.simantics.db.service.QueryControl;\r
  28 \r
  29 public class ConnectionPointMapOfResource extends TransientResourceRead<Map<String, Resource>> {\r
  30 \r
  31         public ConnectionPointMapOfResource(ReadGraph graph, Resource resource) throws DatabaseException {\r
  32             super(graph, resource);\r
  33         }\r
  34         \r
  35         public ConnectionPointMapOfResource(ReadGraph graph, QueryControl qc, Resource resource) throws DatabaseException {\r
  36                 super(graph, qc, resource);\r
  37         }\r
  38 \r
  39         @Override\r
  40         public Map<String,Resource> perform(ReadGraph graph, Resource resource) throws DatabaseException {\r
  41             \r
  42                 Collection<Resource> predicates = graph.getPredicates(resource);\r
  43                 \r
  44                 THashMap<String,Resource> result = null;\r
  45                 \r
  46                 for(Resource predicate : predicates) {\r
  47                         \r
  48                         PropertyInfo info = graph.syncRequest(new PossibleConnectionPointInfo(predicate), TransientCacheAsyncListener.<PropertyInfo>instance());\r
  49                         if(info != null) {\r
  50                                 if (result == null) result = new THashMap<String,Resource>(predicates.size());\r
  51                                 if (result.put(info.name, predicate) != null)\r
  52                                         System.err.println(this + ": The database contains siblings with the same name " + info.name + " (resource=$" + resource.getResourceId() + ").");\r
  53                         }                               \r
  54                         \r
  55                 }\r
  56 \r
  57                 if(result != null) return result;\r
  58                 \r
  59                 else return Collections.emptyMap();\r
  60                         \r
  61         }\r
  62         \r
  63         @Override\r
  64         public int getType() {\r
  65                 return RequestFlags.INVALIDATE;\r
  66         }\r
  67         \r
  68 }\r