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