bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/contribution/ViewpointContributionImpl.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in 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.browsing.ui.graph.impl.contribution;\r
  13 \r
  14 import java.util.Collection;\r
  15 \r
  16 import org.simantics.browsing.ui.NodeContext;\r
  17 import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
  18 import org.simantics.browsing.ui.BuiltinKeys.ViewpointContributionKey;\r
  19 import org.simantics.db.AsyncReadGraph;\r
  20 import org.simantics.db.procedure.Listener;\r
  21 import org.simantics.db.procedure.Procedure;\r
  22 import org.simantics.utils.ui.ErrorLogger;\r
  23 \r
  24 /**\r
  25  * Implement {@link #children(AsyncReadGraph)} and {@link #hasChildren(AsyncReadGraph)}.\r
  26  * \r
  27  * @author Tuukka Lehtonen\r
  28  */\r
  29 abstract public class ViewpointContributionImpl extends FinalViewpointContributionImpl {\r
  30 \r
  31     public ViewpointContributionImpl(PrimitiveQueryUpdater updater,\r
  32             NodeContext context, ViewpointContributionKey key) {\r
  33         super(updater, context, key);\r
  34     }\r
  35 \r
  36     @Override\r
  37     protected Procedure<Collection<NodeContext>> createProcedure() {\r
  38 \r
  39         return new Listener<Collection<NodeContext>>() {\r
  40 \r
  41             @Override\r
  42             public void execute(Collection<NodeContext> result) {\r
  43                 replaceChildrenResult(result);\r
  44             }\r
  45 \r
  46             @Override\r
  47             public boolean isDisposed() {\r
  48                 return updater.isDisposed();\r
  49             }\r
  50 \r
  51             public void exception(Throwable t) {\r
  52                 ErrorLogger.defaultLogError("LazyContributionImpl.childQuery failed, see exception for details.", t);\r
  53             }\r
  54 \r
  55             @Override\r
  56             public String toString() {\r
  57                 return "LazyContributionImpl[" + System.identityHashCode(ViewpointContributionImpl.this) + "].childProcedure";\r
  58             }\r
  59 \r
  60         };\r
  61 \r
  62     }\r
  63 \r
  64 \r
  65 }\r