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