org.simantics.g3d/src/org/simantics/g3d/scenegraph/base/ParentNode.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2012, 2013 Association for Decentralized Information Management in\r
   3  * 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  *******************************************************************************/\r
  12 package org.simantics.g3d.scenegraph.base;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 import java.util.List;\r
  17 \r
  18 import org.simantics.utils.datastructures.MapList;\r
  19 \r
  20 public abstract class ParentNode<T extends INode> extends Node {\r
  21 \r
  22         private MapList<String, T> children = new MapList<String, T>();\r
  23 \r
  24         public synchronized void addNode(String relName, T child) {\r
  25                 if (child.getParent() != null)\r
  26                         child.getParent().removeNode(child.getParentRel(), child);\r
  27 \r
  28                 child.setParent(this, relName);\r
  29                 children.add(relName, (T) child);\r
  30 \r
  31                 childrenChanged();\r
  32                 fireNodeAdded(child, relName);\r
  33         }\r
  34 \r
  35         /**\r
  36          * Removes child node and it's hierarchy.\r
  37          * @param relName\r
  38          * @param child\r
  39          * @return\r
  40          */\r
  41         @SuppressWarnings("unchecked")\r
  42         public synchronized final boolean removeNode(String relName, INode child) {\r
  43                 if (children.remove(relName, (T) child)) {\r
  44                         fireNodeRemoved(child, relName);\r
  45                     child.remove();\r
  46                         child.setParent(null, null);\r
  47                         return true;\r
  48                 }\r
  49                 return false;\r
  50         }\r
  51         \r
  52         /**\r
  53          * Removes child node. The child nodes hierarchy is left intact.\r
  54          * @param relName\r
  55          * @param child\r
  56          * @return\r
  57          */\r
  58         @SuppressWarnings("unchecked")\r
  59         public synchronized final boolean deattachNode(String relName, INode child) {\r
  60                 if (children.remove(relName, (T) child)) {\r
  61                         fireNodeRemoved(child, relName);\r
  62                         child.setParent(null, null);\r
  63                         return true;\r
  64                 }\r
  65                 return false;\r
  66         }\r
  67         \r
  68         public synchronized final boolean removeNodes(String relName) {\r
  69                 List<T> nodes = children.getValues(relName);\r
  70                 for (T child : nodes) {\r
  71                         if (children.remove(relName, (T) child)) {\r
  72                                 fireNodeRemoved(child, relName);\r
  73                             child.remove();\r
  74                                 child.setParent(null, null);\r
  75                                 \r
  76                         }\r
  77                 }\r
  78                 return nodes.size() > 0;\r
  79         }\r
  80 \r
  81         public synchronized final void removeNodes() {\r
  82                 synchronized (children) {\r
  83                         boolean changed = false;\r
  84                         for (String key : children.getKeys()) {\r
  85                                 for (T child : children.getValues(key)) {\r
  86                                         if (child != null) {\r
  87                                                 changed = true;\r
  88                                                 if (child instanceof ParentNode<?>) {\r
  89                                                         ((ParentNode<?>) child).removeNodes();\r
  90                                                 }\r
  91                                                 child.cleanup();\r
  92                                                 child.setParent(null, null);\r
  93                                                 // if (propertyChangeListener != null) {\r
  94                                                 // propertyChangeListener.propertyChange(new\r
  95                                                 // PropertyChangeEvent(this,\r
  96                                                 // "children["+child.getId()+"]", child.getClass(),\r
  97                                                 // NULL)); // "children" is a special field name\r
  98                                                 // }\r
  99                                         }\r
 100                                 }\r
 101                         }\r
 102                         children.clear();\r
 103                         if (changed)\r
 104                                 childrenChanged();\r
 105                 }\r
 106         }\r
 107 \r
 108         public synchronized List<T> getNodes(String rel) {\r
 109                 return children.getValues(rel);\r
 110         }\r
 111 \r
 112         public synchronized List<T> getNodes() {\r
 113                 List<T> result = new ArrayList<T>();\r
 114                 for (String s : children.getKeys())\r
 115                         result.addAll(children.getValues(s));\r
 116                 return result;\r
 117         }\r
 118 \r
 119         protected void childrenChanged() {\r
 120         }\r
 121 \r
 122 \r
 123         @Override\r
 124         public void remove() {\r
 125                 synchronized (children) {\r
 126                         List<T> toRemove = new ArrayList<T>();\r
 127                 \r
 128                         for (String key : children.getKeys()) {\r
 129                 \r
 130                                 for (T child : children.getValues(key)) {\r
 131                                         if (child != null) {\r
 132                                                 toRemove.add(child);\r
 133                                         }\r
 134                                 }\r
 135                         }\r
 136 \r
 137                         for (T n : toRemove) {\r
 138                                 n.remove();\r
 139                         }\r
 140                         \r
 141                         children.clear();\r
 142                         if (toRemove.size() > 0)\r
 143                                 childrenChanged();\r
 144                         super.remove();\r
 145                         \r
 146                 }\r
 147         }\r
 148         \r
 149         \r
 150         \r
 151         \r
 152         protected void fireNodeAdded(INode node, String rel) {\r
 153                 for (NodeListener listener : listeners) {\r
 154                         listener.nodeAdded(this, node, rel);\r
 155                 }\r
 156         }\r
 157         \r
 158         protected void fireNodeRemoved(INode node, String rel) {\r
 159                 for (NodeListener listener : listeners) {\r
 160                         listener.nodeRemoved(this, node, rel);\r
 161                 }\r
 162         }\r
 163         \r
 164 }\r