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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2012 Association for Decentralized Information Management in\r
   3  * Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.modeling.adapters;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.Collections;\r
  16 import java.util.Map;\r
  17 \r
  18 import org.simantics.db.ReadGraph;\r
  19 import org.simantics.db.Resource;\r
  20 import org.simantics.db.WriteGraph;\r
  21 import org.simantics.db.exception.DatabaseException;\r
  22 import org.simantics.diagram.flag.FlagUtil;\r
  23 import org.simantics.diagram.stubs.DiagramResource;\r
  24 import org.simantics.modeling.adapters.Removers.ValidationResult;\r
  25 \r
  26 /**\r
  27  * @author Tuukka Lehtonen\r
  28  */\r
  29 public class FlagRemover extends ElementRemover {\r
  30 \r
  31     public FlagRemover(Resource flag) {\r
  32         super(flag);\r
  33     }\r
  34 \r
  35     @Override\r
  36     public String canRemove(ReadGraph graph, Map<Object, Object> aux) throws DatabaseException {\r
  37         boolean lifted = FlagUtil.isLifted(graph, resource);\r
  38         if (lifted) {\r
  39             ValidationResult result = Removers.validateFlagRemoval(graph, resource);\r
  40             if (result.inUse()) {\r
  41                 return Removers.formatError(graph, result);\r
  42             }\r
  43         }\r
  44         return null;\r
  45     }\r
  46 \r
  47     @Override\r
  48     public void remove(WriteGraph graph) throws DatabaseException {\r
  49         FlagUtil.disconnectFlag(graph, resource);\r
  50 \r
  51         DiagramResource DIA = DiagramResource.getInstance(graph);\r
  52         Collection<Resource> connectionRelations = Collections.emptySet();\r
  53         if (FlagUtil.isLifted(graph, resource))\r
  54             connectionRelations = graph.getObjects(resource, DIA.IsLiftedAs);\r
  55 \r
  56         removeElement(graph);\r
  57 \r
  58         if (!connectionRelations.isEmpty()) {\r
  59             for (Resource connectionRelation : connectionRelations) {\r
  60                 new ConnectionRelationRemover(connectionRelation).remove(graph);\r
  61             }\r
  62         }\r
  63     }\r
  64 \r
  65 }\r