org.simantics.g3d/src/org/simantics/proconf/g3d/actions/ReadAction.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007- VTT Technical Research Centre of Finland.\r
   3  * All rights reserved. This program and the accompanying materials\r
   4  * are made available under the terms of the Eclipse Public License v1.0\r
   5  * which accompanies this distribution, and is available at\r
   6  * http://www.eclipse.org/legal/epl-v10.html\r
   7  *\r
   8  * Contributors:\r
   9  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  10  *******************************************************************************/\r
  11 package org.simantics.proconf.g3d.actions;\r
  12 \r
  13 import org.simantics.db.Graph;\r
  14 import org.simantics.db.GraphRequest;\r
  15 import org.simantics.db.GraphRequestAdapter;\r
  16 import org.simantics.db.GraphRequestStatus;\r
  17 import org.simantics.db.Session;\r
  18 import org.simantics.proconf.g3d.base.ThreeDimensionalEditorBase;\r
  19 \r
  20 public abstract class ReadAction extends ContextAction {\r
  21         boolean sync;\r
  22         public ReadAction(ThreeDimensionalEditorBase parent, boolean sync) {\r
  23                 super(parent);\r
  24                 this.sync = sync;\r
  25         }\r
  26 \r
  27         @Override\r
  28         public final void run() {\r
  29                 Session session = parent.getSession();\r
  30                 if(!canActivate()) {\r
  31                         return;\r
  32                 }\r
  33                 GraphRequest r = new GraphRequestAdapter() {\r
  34                         @Override\r
  35                         public GraphRequestStatus perform(Graph g) throws Exception {\r
  36                                 doChanges(g);\r
  37                                 return GraphRequestStatus.transactionComplete();\r
  38                         }\r
  39                 };\r
  40                 if (sync) {\r
  41                         session.syncRead(r);\r
  42                 } else {\r
  43                         session.asyncRead(r);\r
  44                 } \r
  45         }\r
  46         \r
  47         public abstract void doChanges(Graph graph) throws Exception;\r
  48 \r
  49         public boolean canActivate() {\r
  50                 return true;\r
  51         }\r
  52 }\r