bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/PossibleExperimentVariable.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.ResourceArray;
  17 import org.simantics.db.common.exception.DebugException;
  18 import org.simantics.db.common.request.BinaryRead;
  19 import org.simantics.db.exception.AdaptionException;
  20 import org.simantics.db.exception.DatabaseException;
  21 import org.simantics.db.exception.ResourceNotFoundException;
  22 import org.simantics.db.layer0.exception.MissingVariableException;
  23 import org.simantics.db.layer0.variable.Variable;
  24 import org.simantics.db.layer0.variable.VariableInterface;
  25
  26 public class PossibleExperimentVariable extends BinaryRead<String, ResourceArray, Variable> {
  27
  28     public PossibleExperimentVariable(String experiment, ResourceArray resource) {
  29         super(experiment, resource);
  30     }
  31
  32     @Override
  33     public Variable perform(ReadGraph graph) throws DatabaseException {
  34
  35         try {
  36
  37                 Resource tail = parameter2.tail();
  38                 Resource head = parameter2.head();
  39
  40                 if(!graph.hasStatement(tail)) return null;
  41
  42                 String valuationName = parameter;
  43
  44             Resource model = graph.syncRequest(new PossibleModel(head));
  45             if (model == null) return null;
  46
  47             VariableInterface variableInterface = graph.adapt(model, VariableInterface.class);
  48             Variable modelVariable = graph.adapt(model, Variable.class);
  49             Variable experimentVariable = modelVariable.browse(graph, valuationName);
  50             return variableInterface.getVariable(graph, experimentVariable, parameter2);
  51
  52         } catch (MissingVariableException e) {
  53             if (DebugException.DEBUG)
  54                 e.printStackTrace();
  55             return null;
  56         } catch (ResourceNotFoundException e) {
  57             if (DebugException.DEBUG)
  58                 e.printStackTrace();
  59             return null;
  60         } catch (AdaptionException e) {
  61             if (DebugException.DEBUG)
  62                 e.printStackTrace();
  63             return null;
  64         } catch (Throwable e) {
  65             if (DebugException.DEBUG)
  66                 e.printStackTrace();
  67             return null;
  68         }
  69
  70     }
  71
  72 }