bundles/org.simantics.modeling/src/org/simantics/modeling/adapters/FlagRemover.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012 Association for Decentralized Information Management in
   3  * 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.modeling.adapters;
  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.WriteGraph;
  21 import org.simantics.db.exception.DatabaseException;
  22 import org.simantics.diagram.flag.FlagUtil;
  23 import org.simantics.diagram.stubs.DiagramResource;
  24 import org.simantics.modeling.adapters.Removers.ValidationResult;
  25
  26 /**
  27  * @author Tuukka Lehtonen
  28  */
  29 public class FlagRemover extends ElementRemover {
  30
  31     public FlagRemover(Resource flag) {
  32         super(flag);
  33     }
  34
  35     @Override
  36     public String canRemove(ReadGraph graph, Map<Object, Object> aux) throws DatabaseException {
  37         boolean lifted = FlagUtil.isLifted(graph, resource);
  38         if (lifted) {
  39             ValidationResult result = Removers.validateFlagRemoval(graph, resource);
  40             if (result.inUse()) {
  41                 return Removers.formatError(graph, result);
  42             }
  43         }
  44         return null;
  45     }
  46
  47     @Override
  48     public void remove(WriteGraph graph) throws DatabaseException {
  49         FlagUtil.disconnectFlag(graph, resource);
  50
  51         DiagramResource DIA = DiagramResource.getInstance(graph);
  52         Collection<Resource> connectionRelations = Collections.emptySet();
  53         if (FlagUtil.isLifted(graph, resource))
  54             connectionRelations = graph.getObjects(resource, DIA.IsLiftedAs);
  55
  56         removeElement(graph);
  57
  58         if (!connectionRelations.isEmpty()) {
  59             for (Resource connectionRelation : connectionRelations) {
  60                 new ConnectionRelationRemover(connectionRelation).remove(graph);
  61             }
  62         }
  63     }
  64
  65 }