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

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