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

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