bundles/org.simantics.issues.common/src/org/simantics/issues/common/IssueContexts.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.issues.common;
  13
  14 import gnu.trove.set.hash.THashSet;
  15
  16 import java.util.Set;
  17
  18 import org.simantics.db.ReadGraph;
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.common.request.UnaryRead;
  21 import org.simantics.db.common.utils.ListUtils;
  22 import org.simantics.db.exception.DatabaseException;
  23 import org.simantics.db.layer0.variable.Variable;
  24 import org.simantics.issues.ontology.IssueResource;
  25
  26 /**
  27  * A request for calculating the set of issue context resources for the
  28  * specified set of issue variables.
  29  *
  30  * @author Tuukka Lehtonen
  31  */
  32 public class IssueContexts extends UnaryRead<Set<Variable>, Set<Resource>> {
  33
  34     public IssueContexts(Set<Variable> variables) {
  35         super(variables);
  36     }
  37
  38     @Override
  39     public Set<Resource> perform(ReadGraph graph) throws DatabaseException {
  40         IssueResource ISSUE = IssueResource.getInstance(graph);
  41         Set<Resource> result = new THashSet<Resource>(parameter.size());
  42         for(Variable issue : parameter) {
  43                 Resource issueResource = issue.getRepresents(graph);
  44             result.addAll(graph.getObjects(issueResource, ISSUE.Issue_HasContext));
  45             Resource list = graph.getPossibleObject(issueResource, ISSUE.Issue_HasContexts);
  46             if(list != null) result.addAll(ListUtils.toList(graph, list));
  47         }
  48         return result;
  49     }
  50
  51 }