bundles/org.simantics.modeling/src/org/simantics/modeling/adapters/ConnectionRelationRemover.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.Map;\r
  16 \r
  17 import org.simantics.db.ReadGraph;\r
  18 import org.simantics.db.Resource;\r
  19 import org.simantics.db.WriteGraph;\r
  20 import org.simantics.db.common.utils.OrderedSetUtils;\r
  21 import org.simantics.db.exception.DatabaseException;\r
  22 import org.simantics.db.layer0.adapter.impl.AbstractRemover;\r
  23 import org.simantics.db.layer0.util.RemoverUtil;\r
  24 import org.simantics.diagram.stubs.DiagramResource;\r
  25 import org.simantics.layer0.Layer0;\r
  26 import org.simantics.modeling.ModelingResources;\r
  27 import org.simantics.modeling.adapters.Removers.ValidationResult;\r
  28 \r
  29 /**\r
  30  * @author Tuukka Lehtonen\r
  31  * @see TerminalRemover\r
  32  */\r
  33 public class ConnectionRelationRemover extends AbstractRemover {\r
  34 \r
  35     public ConnectionRelationRemover(Resource connectionRelation) {\r
  36         super(connectionRelation);\r
  37     }\r
  38 \r
  39     @Override\r
  40     public String canRemove(ReadGraph graph, Map<Object, Object> aux) throws DatabaseException {\r
  41         ModelingResources MOD = ModelingResources.getInstance(graph);\r
  42         Resource diagramConnectionRelation = null;\r
  43         Resource connectionRelation = graph.getPossibleObject(resource, MOD.DiagramConnectionRelationToConnectionRelation);\r
  44         if (connectionRelation != null)\r
  45             diagramConnectionRelation = resource;\r
  46         else\r
  47             connectionRelation = resource;\r
  48         ValidationResult result = Removers.validateConnectionRelationRemoval(graph, connectionRelation, diagramConnectionRelation);\r
  49         if (result.inUse())\r
  50             return Removers.formatError(graph, result);\r
  51         return null;\r
  52     }\r
  53 \r
  54     @Override\r
  55     public void remove(WriteGraph graph) throws DatabaseException {\r
  56         Layer0 L0 = Layer0.getInstance(graph);\r
  57         DiagramResource DIA = DiagramResource.getInstance(graph);\r
  58         ModelingResources MOD = ModelingResources.getInstance(graph);\r
  59 \r
  60         Collection<Resource> lifts = graph.getObjects(resource, DIA.Lifts);\r
  61 \r
  62         // Not necessary, this is legacy support only.\r
  63         for (Resource def : graph.getObjects(resource, L0.ConcernsRelation_Inverse))\r
  64             graph.deny(def);\r
  65 \r
  66         // Remove possible symbol terminal(s).\r
  67         for (Resource diagramConnectionRelation : graph.getObjects(resource, MOD.ConnectionRelationToDiagramConnectionRelation)) {\r
  68             removeTerminals(graph, DIA, diagramConnectionRelation);\r
  69             Resource diagramConnectionRelationInverse = graph.getPossibleObject(diagramConnectionRelation, L0.InverseOf);\r
  70             graph.deny(diagramConnectionRelation);\r
  71             if (diagramConnectionRelationInverse != null)\r
  72                 graph.deny(diagramConnectionRelationInverse);\r
  73         }\r
  74         removeTerminals(graph, DIA, resource);\r
  75 \r
  76         Resource connectionRelationInverse = graph.getPossibleObject(resource, L0.InverseOf);\r
  77         graph.deny(resource);\r
  78         if (connectionRelationInverse != null)\r
  79             graph.deny(connectionRelationInverse);\r
  80 \r
  81         if (!lifts.isEmpty())\r
  82             for (Resource lift : lifts)\r
  83                 RemoverUtil.remove(graph, lift);\r
  84     }\r
  85     \r
  86     private void removeTerminals(WriteGraph graph, DiagramResource DIA, Resource diagramConnectionRelation) throws DatabaseException {\r
  87         for (Resource terminal : graph.getObjects(diagramConnectionRelation, DIA.HasConnectionPoint_Inverse)) {\r
  88             for (Resource ownerList : OrderedSetUtils.getOwnerLists(graph, terminal, DIA.Composite)) {\r
  89                 OrderedSetUtils.remove(graph, ownerList, terminal);\r
  90             }\r
  91             RemoverUtil.remove(graph, terminal);\r
  92         }\r
  93     }\r
  94 \r
  95 }\r