bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/processors/DefaultComparableChildrenProcessor.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.common.processors;
  13
  14 import java.util.Collection;
  15
  16 import org.simantics.browsing.ui.BuiltinKeys;
  17 import org.simantics.browsing.ui.NodeContext;
  18 import org.simantics.browsing.ui.NodeQueryManager;
  19 import org.simantics.browsing.ui.NodeContext.QueryKey;
  20 import org.simantics.browsing.ui.content.ComparableContext;
  21 import org.simantics.browsing.ui.content.ComparableContextFactory;
  22 import org.simantics.browsing.ui.content.PrunedChildrenResult;
  23
  24 public class DefaultComparableChildrenProcessor extends AbstractNodeQueryProcessor<ComparableContext[]> {
  25
  26     private ComparableContext[] build(NodeQueryManager manager, NodeContext context, ComparableContextFactory factory) {
  27         PrunedChildrenResult pruned = manager.query(context, BuiltinKeys.PRUNED_CHILDREN);
  28         NodeContext[] prunedChildren = pruned.getPrunedChildren();
  29         return factory.create(manager, context, prunedChildren);
  30     }
  31
  32     @Override
  33     public ComparableContext[] query(NodeQueryManager manager, NodeContext context) {
  34         Collection<ComparableContextFactory> factories = manager.query(context, BuiltinKeys.COMPARABLE_FACTORIES);
  35         if(factories.isEmpty())
  36             return null;
  37
  38         // TODO: use SelectedComparatorFactory query instead of this "educated guess"
  39         ComparableContextFactory factory = factories.iterator().next();
  40
  41         return build(manager, context, factory);
  42     }
  43
  44     @Override
  45     public String toString() {
  46         return "ComparableProcessor";
  47     }
  48
  49     @Override
  50     public QueryKey<ComparableContext[]> getIdentifier() {
  51         return BuiltinKeys.COMPARABLE_CHILDREN;
  52     }
  53
  54 }