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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 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.structural2.queries;
  13
  14 import java.util.Collection;
  15 import java.util.Collections;
  16 import java.util.Map;
  17
  18 import org.simantics.db.ReadGraph;
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
  21 import org.simantics.db.common.request.TransientResourceRead;
  22 import org.simantics.db.exception.DatabaseException;
  23 import org.simantics.db.layer0.request.PropertyInfo;
  24 import org.simantics.db.request.RequestFlags;
  25 import org.simantics.db.service.QueryControl;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 import gnu.trove.map.hash.THashMap;
  30
  31 public class ConnectionPointMapOfResource extends TransientResourceRead<Map<String, Resource>> {
  32
  33     private static final Logger LOGGER = LoggerFactory.getLogger(ConnectionPointMapOfResource.class);
  34
  35         public ConnectionPointMapOfResource(ReadGraph graph, Resource resource) throws DatabaseException {
  36             super(graph, resource);
  37         }
  38
  39         public ConnectionPointMapOfResource(ReadGraph graph, QueryControl qc, Resource resource) throws DatabaseException {
  40                 super(graph, qc, resource);
  41         }
  42
  43         @Override
  44         public Map<String,Resource> perform(ReadGraph graph, Resource resource) throws DatabaseException {
  45
  46                 Collection<Resource> predicates = graph.getPredicates(resource);
  47
  48                 THashMap<String,Resource> result = null;
  49
  50                 for(Resource predicate : predicates) {
  51
  52                         PropertyInfo info = graph.syncRequest(new PossibleConnectionPointInfo(predicate), TransientCacheAsyncListener.<PropertyInfo>instance());
  53                         if(info != null) {
  54                                 if (result == null) result = new THashMap<String,Resource>(predicates.size());
  55                                 if (result.put(info.name, predicate) != null)
  56                                     LOGGER.error("The database contains siblings with the same name " + info.name + " (resource=$" + resource.getResourceId() + ").");
  57                         }
  58
  59                 }
  60
  61                 if(result != null) return result;
  62
  63                 else return Collections.emptyMap();
  64
  65         }
  66
  67         @Override
  68         public int getType() {
  69                 return RequestFlags.INVALIDATE;
  70         }
  71
  72 }