bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/DefaultIsCheckedProcessor2.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.swt;
  13
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.Collections;
  17
  18 import org.simantics.browsing.ui.BuiltinKeys;
  19 import org.simantics.browsing.ui.CheckedState;
  20 import org.simantics.browsing.ui.NodeContext;
  21 import org.simantics.browsing.ui.NodeQueryManager;
  22 import org.simantics.browsing.ui.NodeQueryProcessor;
  23 import org.simantics.browsing.ui.Tester;
  24 import org.simantics.browsing.ui.BuiltinKeys.CheckedStateKey;
  25 import org.simantics.browsing.ui.NodeContext.QueryKey;
  26 import org.simantics.browsing.ui.common.EvaluatorData;
  27 import org.simantics.browsing.ui.common.Preference;
  28 import org.simantics.browsing.ui.common.EvaluatorData.Evaluator;
  29 import org.simantics.browsing.ui.common.EvaluatorData.EvaluatorTree;
  30 import org.simantics.browsing.ui.content.CheckedStateFactory;
  31 import org.simantics.utils.datastructures.collections.CollectionUtils;
  32
  33 /**
  34  * @author Antti Villberg
  35  */
  36 public class DefaultIsCheckedProcessor2 implements NodeQueryProcessor<CheckedState> {
  37
  38     private final EvaluatorData data;
  39
  40     public DefaultIsCheckedProcessor2(EvaluatorData data) {
  41         this.data = data;
  42     }
  43
  44     @Override
  45     public QueryKey<CheckedState> getIdentifier() {
  46         return BuiltinKeys.IS_CHECKED;
  47     }
  48
  49     @Override
  50     public CheckedState query(final NodeQueryManager manager, final NodeContext context) {
  51         assert context != null;
  52
  53         Object input = context.getConstant(BuiltinKeys.INPUT);
  54         assert input != null;
  55
  56         Collection<Evaluator> evals = data.get(input);
  57         if (evals.isEmpty())
  58             return null;
  59
  60         ArrayList<Preference<CheckedStateFactory>> factories = new ArrayList<Preference<CheckedStateFactory>>(4);
  61         for (Evaluator eval : evals) {
  62             evaluateTree(manager, context, eval.getCheckStateTree(), factories);
  63         }
  64
  65         if (factories.isEmpty())
  66             return null;
  67
  68         if (factories.size() >= 1) {
  69             Collections.sort(factories);
  70             return manager.query(context, new CheckedStateKey(factories.get(0).object));
  71         } else {
  72                 return null;
  73         }
  74
  75     }
  76
  77     protected void evaluateTree(NodeQueryManager manager, NodeContext context, EvaluatorTree<CheckedStateFactory> tree, Collection<Preference<CheckedStateFactory>> result) {
  78         Tester test = tree.getTester();
  79
  80         if (test.test(manager, context)) {
  81             CollectionUtils.checkedAdd(tree.getAcceptedFactories(), result);
  82
  83             Collection<EvaluatorTree<CheckedStateFactory>> children = tree.getChildren();
  84             if (children == null)
  85                 return;
  86             for (EvaluatorTree<CheckedStateFactory> e : children) {
  87                 evaluateTree(manager, context, e, result);
  88             }
  89         }
  90     }
  91
  92     @Override
  93     public String toString() {
  94         return "IsCheckedProcessor";
  95     }
  96
  97 }