bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/hints/HintStackTest.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 /*
  13  *
  14  * @author Toni Kalajainen
  15  */
  16 package org.simantics.utils.datastructures.hints;
  17
  18 import org.simantics.utils.datastructures.hints.IHintContext.Key;
  19 import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
  20
  21 public class HintStackTest {
  22
  23         public static final Key KEY = new KeyOf(Double.class);
  24
  25         /**
  26          * @param args
  27          */
  28         public static void main(String[] args) {
  29                 IHintStack stack = new HintStack();
  30                 stack.addHintListener(new IHintListener() {
  31                         @Override
  32                         public void hintChanged(IHintObservable sender, Key key,
  33                                         Object oldValue, Object newValue) {
  34                                 System.out.println("Hint changed: "+key+"="+newValue+" (was "+oldValue+")");
  35                         }
  36
  37                         @Override
  38                         public void hintRemoved(IHintObservable sender, Key key,
  39                                         Object oldValue) {
  40                                 System.out.println("Hint removed: "+key+" (was "+oldValue+")");
  41                         }});
  42                 IHintContext c1 = new HintContext();
  43                 IHintContext c2 = new HintContext();
  44
  45                 c1.setHint(KEY, 1.0);
  46                 c2.setHint(KEY, 2.0);
  47
  48                 // KEY added
  49                 stack.addHintContext(c1, 0);
  50                 // KEY overridden
  51                 stack.addHintContext(c2, 1);
  52
  53                 // underlying removed, do not do anything
  54                 stack.removeHintContext(c1);
  55
  56                 // add over prev value, override
  57                 stack.addHintContext(c1, 2);
  58
  59                 // should not do anything, is overridden
  60                 c2.setHint(KEY, 3.0);
  61
  62                 // changed. overrides c2
  63                 c1.setHint(KEY, 4.0);
  64
  65                 // removed. c2's value 3 becomes effective
  66                 c1.removeHint(KEY);
  67         }
  68
  69 }