bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleObjectWithName.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.db.common.request;
  13
  14 import org.simantics.db.ReadGraph;
  15 import org.simantics.db.Resource;
  16 import org.simantics.db.exception.DatabaseException;
  17 import org.simantics.layer0.Layer0;
  18
  19 final public class PossibleObjectWithName extends TernaryRead<Resource, Resource, String, Resource> {
  20
  21     public PossibleObjectWithName(Resource resource, Resource predicate, String name) {
  22         super(resource, predicate, name);
  23     }
  24
  25     @Override
  26     public Resource perform(ReadGraph graph) throws DatabaseException {
  27         Layer0 b = Layer0.getInstance(graph);
  28         Resource result = null;
  29         for(Resource object : graph.getObjects(parameter, parameter2)) {
  30                 String name = graph.getPossibleRelatedValue(object, b.HasName);
  31             if(parameter3.equals(name)) {
  32                 if(result != null) return null;
  33                 result = object;
  34             }
  35         }
  36         return result;
  37     }
  38
  39 }