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[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / request / PossibleActiveVariableFromVariable.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.layer0.request;
13
14 import org.simantics.db.ReadGraph;
15 import org.simantics.db.Resource;
16 import org.simantics.db.common.request.UnaryRead;
17 import org.simantics.db.exception.DatabaseException;
18 import org.simantics.db.layer0.variable.Variable;
19 import org.simantics.db.layer0.variable.Variables;
20 import org.simantics.layer0.Layer0;
21 import org.simantics.simulation.ontology.SimulationResource;
22
23 public class PossibleActiveVariableFromVariable extends UnaryRead<Variable, Variable> {
24
25     public PossibleActiveVariableFromVariable(Variable configurationVariable) {
26         super(configurationVariable);
27     }
28
29     @Override
30     public Variable perform(ReadGraph graph) throws DatabaseException {
31
32         Layer0 b = Layer0.getInstance(graph);
33         SimulationResource SIMU = SimulationResource.getInstance(graph);
34         Resource result = null;
35         
36         Resource model = Variables.getModel(graph, parameter);
37         if (model == null)
38             return null;
39
40         for(Resource config : graph.getObjects(model, b.ConsistsOf)) {
41             if(graph.isInstanceOf(config, SIMU.Experiment)) {
42                 for(Resource run : graph.getObjects(config, b.ConsistsOf)) {
43                     if(graph.isInstanceOf(run, SIMU.Run)) {
44                         if(graph.hasStatement(run, SIMU.IsActive)) {
45                             if(result != null) return null;
46                             result = run;
47                         }
48                     }
49                 }
50             }
51         }
52         
53         if(result == null) return null;
54
55         return Variables.switchPossibleContext(graph, parameter, result);
56
57     }
58
59 }