bundles/org.simantics.modeling/src/org/simantics/modeling/actions/DisconnectFlag.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.modeling.actions;
  13
  14 import java.util.Collections;
  15 import java.util.HashSet;
  16 import java.util.List;
  17 import java.util.Set;
  18
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.Session;
  21 import org.simantics.db.WriteGraph;
  22 import org.simantics.db.common.request.WriteRequest;
  23 import org.simantics.db.exception.DatabaseException;
  24 import org.simantics.diagram.flag.FlagUtil;
  25 import org.simantics.layer0.Layer0;
  26 import org.simantics.layer0.utils.operations.Operation;
  27 import org.simantics.utils.datastructures.Callback;
  28 import org.simantics.utils.datastructures.persistent.IContextMap;
  29 import org.simantics.utils.ui.ErrorLogger;
  30
  31 public class DisconnectFlag extends Operation {
  32
  33     public DisconnectFlag() {
  34         super("Disconnect");
  35     }
  36
  37     @Override
  38     public void exec(Session session, IContextMap parameters) {
  39         final Resource flag = (Resource) parameters.get(SUBJECT);
  40         session.asyncRequest(new WriteRequest() {
  41             @Override
  42             public void perform(WriteGraph g) throws DatabaseException {
  43                 disconnectFlags(g, Collections.singletonList(flag));
  44             }
  45         }, new Callback<DatabaseException>() {
  46             @Override
  47             public void run(DatabaseException parameter) {
  48                 if (parameter != null)
  49                     ErrorLogger.defaultLogError("Flag disconnect failed, see exception for details.", parameter);
  50             }
  51         });
  52     }
  53
  54     public static int disconnectFlags(WriteGraph graph, List<Resource> flags) throws DatabaseException {
  55         Layer0 L0 = Layer0.getInstance(graph);
  56         int count = 0;
  57         for (Resource flag : flags) {
  58             Set<Resource> counterParts = FlagUtil.getCounterparts(graph, flag,
  59                     new HashSet<Resource>(Collections.singleton(flag)));
  60             FlagUtil.disconnectFlag(graph, flag);
  61             for (Resource f : counterParts)
  62                 graph.denyValue(f, L0.HasLabel);
  63         }
  64         return count;
  65     }
  66
  67 }