bundles/org.simantics.simulator.variable/src/org/simantics/simulator/variable/impl/AbstractNodeManager.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2013 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *     Semantum Oy - initial API and implementation\r
  12  *******************************************************************************/\r
  13 package org.simantics.simulator.variable.impl;\r
  14 \r
  15 import java.util.ArrayList;\r
  16 import java.util.List;\r
  17 import java.util.Set;\r
  18 \r
  19 import org.simantics.databoard.Bindings;\r
  20 import org.simantics.databoard.binding.Binding;\r
  21 import org.simantics.databoard.binding.VariantBinding;\r
  22 import org.simantics.databoard.binding.error.BindingException;\r
  23 import org.simantics.databoard.binding.mutable.Variant;\r
  24 import org.simantics.databoard.type.Datatype;\r
  25 import org.simantics.simulator.variable.NodeManager;\r
  26 import org.simantics.simulator.variable.exceptions.NoSuchNodeException;\r
  27 import org.simantics.simulator.variable.exceptions.NodeManagerException;\r
  28 \r
  29 /**\r
  30  * AbstractNodeManager gives default implementations to some methods\r
  31  * of NodeManager.\r
  32  * \r
  33  * @author Hannu Niemist&ouml;\r
  34  */\r
  35 public abstract class AbstractNodeManager<Node> implements NodeManager<Node> {\r
  36         \r
  37 \r
  38     final static Binding NO_BINDING = new VariantBinding() {\r
  39 \r
  40         @Override\r
  41         public Object getContent(Object variant, Binding contentBinding) throws BindingException {\r
  42             throw new Error();\r
  43         }\r
  44 \r
  45         @Override\r
  46         public Object getContent(Object variant) throws BindingException {\r
  47             throw new Error();\r
  48         }\r
  49 \r
  50         @Override\r
  51         public Datatype getContentType(Object variant) throws BindingException {\r
  52             throw new Error();\r
  53         }\r
  54 \r
  55         @Override\r
  56         public Binding getContentBinding(Object variant) throws BindingException {\r
  57             throw new Error();\r
  58         }\r
  59 \r
  60         @Override\r
  61         public Object create(Binding contentBinding, Object content) throws BindingException {\r
  62             throw new Error();\r
  63         }\r
  64 \r
  65         @Override\r
  66         public void setContent(Object variant, Binding contentBinding, Object content) throws BindingException {\r
  67             throw new Error();\r
  68         }\r
  69 \r
  70         @Override\r
  71         public boolean isInstance(Object obj) {\r
  72             return true;\r
  73         }\r
  74 \r
  75         @Override\r
  76         public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {\r
  77             throw new Error();\r
  78         }\r
  79         \r
  80         @Override\r
  81         public int compare(Object o1, Object o2) throws org.simantics.databoard.binding.error.RuntimeBindingException {\r
  82                 if(o1 == null) {\r
  83                         if(o2 == null) {\r
  84                                 return 0;\r
  85                         } else {\r
  86                                 return  - System.identityHashCode(o2);\r
  87                         }\r
  88                 } else {\r
  89                         if(o2 == null) {\r
  90                                 return  System.identityHashCode(o1);\r
  91                         } else {\r
  92                                 if(o1.equals(o2)) return 0;\r
  93                                 return System.identityHashCode(o1) - System.identityHashCode(o2);       \r
  94                         }\r
  95                 }\r
  96         }\r
  97 \r
  98     };\r
  99     \r
 100         @Override\r
 101         public List<String> getChildNames(Node node) throws NodeManagerException {\r
 102                 List<Node> children = getChildren(node);\r
 103                 ArrayList<String> names = new ArrayList<String>(children.size());\r
 104                 for(Node child : children)\r
 105                         names.add(getName(child));\r
 106                 return names;\r
 107         }\r
 108         \r
 109         @Override\r
 110         public List<String> getPropertyNames(Node node) throws NodeManagerException {\r
 111                 List<Node> properties = getProperties(node);\r
 112                 ArrayList<String> names = new ArrayList<String>(properties.size());\r
 113                 for(Node property : properties)\r
 114                         names.add(getName(property));\r
 115                 return names;\r
 116         }\r
 117         \r
 118         @Override\r
 119         public Object getValue(Node node, String propertyName, Binding binding)\r
 120                         throws NodeManagerException, BindingException {\r
 121                 Node property = getProperty(node, propertyName);\r
 122                 if(property == null)\r
 123                         throw new NoSuchNodeException("Didn't find a property " + propertyName);\r
 124                 return getValue(property, binding);\r
 125         }\r
 126         \r
 127         @Override\r
 128         public void setValue(Node node, String propertyName, Object value,\r
 129                         Binding binding) throws NodeManagerException, BindingException {\r
 130                 Node property = getProperty(node, propertyName);\r
 131                 if(property == null)\r
 132                         throw new NoSuchNodeException("Didn't find a property " + propertyName);\r
 133                 setValue(property, value, binding);\r
 134         }\r
 135         \r
 136         @Override\r
 137         public Variant getValue(Node node) throws NodeManagerException {\r
 138                 Datatype datatype = getDatatype(node);\r
 139                 Binding binding = datatype != null ? Bindings.getBinding(datatype) : NO_BINDING;\r
 140                 try {\r
 141                         Object value = getValue(node, binding);\r
 142                         if (value instanceof Variant)\r
 143                                 return (Variant)value;\r
 144                         else\r
 145                                 return new Variant(binding, value);\r
 146                 } catch (BindingException e) {\r
 147                         // Shouldn't really happen\r
 148                         assert(false);\r
 149                         return new Variant();\r
 150                 }\r
 151         }\r
 152         \r
 153         @Override\r
 154         public Variant getValue(Node node, String propertyName)\r
 155                         throws NodeManagerException {\r
 156                 Node property = getProperty(node, propertyName);\r
 157                 if(property == null)\r
 158                         throw new NoSuchNodeException("Didn't find a property " + propertyName);\r
 159                 return getValue(property);\r
 160         }\r
 161         \r
 162     @Override\r
 163     public String getPropertyURI(Node parent, Node property) {\r
 164         return null;\r
 165     }   \r
 166 \r
 167 }\r