bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/PropertyHandlerImpl.java.keep

   1 /*******************************************************************************
   2  * Copyright (c) 2007- VTT Technical Research Centre of Finland.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     VTT Technical Research Centre of Finland - initial API and implementation
  10  *******************************************************************************/
  11 package org.simantics.g2d.element.handler;
  12
  13 import java.util.ArrayList;
  14 import java.util.Collection;
  15 import java.util.HashSet;
  16 import java.util.List;
  17 import java.util.Set;
  18
  19 import org.simantics.g2d.element.IElement;
  20 import org.simantics.utils.datastructures.hints.IHintContext.Key;
  21 import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
  22 import org.simantics.utils.datastructures.valueinterface.InvalidItemException;
  23 import org.simantics.utils.datastructures.valueinterface.SubscriptionException;
  24 import org.simantics.utils.datastructures.valueinterface.ValueAccess;
  25 import org.simantics.utils.datastructures.valueinterface.ValueMap;
  26 import org.simantics.utils.datastructures.valueinterface.impl.SimpleValueMap;
  27 import org.simantics.utils.datastructures.valueinterface.impl.ValueMonitor;
  28
  29 /**
  30  *
  31  * @Author Toni Kalajainen
  32  */
  33 public class PropertyHandlerImpl implements PropertyHandler {
  34
  35         List<String> keys = new ArrayList<String>();
  36         Set<String> keys2 = new HashSet<String>();
  37         ValueMap<String> initialValues;
  38
  39         private static final Key KEY_VM = new KeyOf(ValueMonitor.class);
  40
  41         public PropertyHandlerImpl(String ... keys)
  42         {
  43                 for (String k : keys) {
  44                         this.keys.add(k);
  45                         this.keys2.add(k);
  46                 }
  47         }
  48
  49         public PropertyHandlerImpl(Collection<String> keys, ValueMap<String> initialValues)
  50         {
  51                 for (String k : keys) {
  52                         this.keys.add(k);
  53                         this.keys2.add(k);
  54                 }
  55                 if (initialValues!=null)
  56                         this.initialValues = new SimpleValueMap<String>(initialValues);
  57         }
  58
  59         @Override
  60         public void enumerateProperties(Collection<String> collection) {
  61                 collection.addAll(keys);
  62         }
  63
  64         @Override
  65         public Object getValue(IElement e, String key) {
  66                 ValueMonitor<String> vm = e.getHint(KEY_VM);
  67                 if (vm==null) return null;
  68                 return vm.get(key);
  69         }
  70
  71         @Override
  72         public void setValueSource(IElement e, ValueAccess<String> access) {
  73                 if (access==null) {
  74                         ValueMonitor<String> vm = e.getHint(KEY_VM);
  75                         if (vm!=null) {
  76                                 e.removeHint(KEY_VM);
  77                                 vm.dispose();
  78                         }
  79                         return;
  80                 }
  81                 try {
  82                         ValueMonitor<String> vm = new ValueMonitor<String>(access, keys2, initialValues);
  83                         e.setHint(KEY_VM, vm);
  84                         vm.dispose();
  85                 } catch (SubscriptionException e1) {
  86                         e1.printStackTrace();
  87                 } catch (InvalidItemException e1) {
  88                         e1.printStackTrace();
  89                 }
  90         }
  91
  92 }