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1 package treecms.tree.memory;
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2
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3 import java.util.Collections;
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4 import java.util.HashMap;
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5 import java.util.HashSet;
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6 import java.util.Iterator;
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7 import java.util.Map;
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8 import java.util.Set;
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9 import treecms.api.Node;
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10 import treecms.api.NodeID;
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11
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12 public class OnMemoryNode implements Node
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13 {
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14 NodeID m_id;
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15 OnMemoryTree m_tree;
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16
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17 HashSet<Node> m_children;
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18 HashMap<String,byte[]> m_attrs;
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19
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20 public OnMemoryNode(NodeID _id,OnMemoryTree _tree)
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21 {
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22 m_id = _id;
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23 m_tree = _tree;
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24 m_children = new HashSet<Node>();
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25 m_attrs = new HashMap<String,byte[]>();
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26 }
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27
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28 @Override
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29 public Node createNode()
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30 {
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31 OnMemoryNode child = m_tree.createNode(null);
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32 return child;
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33 }
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34
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35 @Override
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36 public NodeID getID()
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37 {
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38 return m_id;
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39 }
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40
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41 @Override
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42 public Iterator<Node> iterator()
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43 {
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44 return Collections.unmodifiableSet(m_children).iterator();
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45 }
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46
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47 @Override
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48 public Node addChild(Node _child)
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49 {
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50 OnMemoryTree.NodeData data = m_tree.extractData(this);
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51 data.m_children.add(_child);
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52 OnMemoryNode newNode = m_tree.clonetree(this,data);
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53 if(newNode == null){
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54 m_children.add(_child);
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55 return this;
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56 }
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57 return newNode;
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58 }
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59
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60 @Override
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61 public Node addChildren(Set<Node> _children)
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62 {
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63 OnMemoryTree.NodeData data = m_tree.extractData(this);
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64 data.m_children.addAll(_children);
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65 OnMemoryNode newNode = m_tree.clonetree(this,data);
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66 if(newNode == null){
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67 m_children.addAll(_children);
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68 return this;
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69 }
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70 return newNode;
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71 }
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72
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73 @Override
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74 public Node clearChildren()
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75 {
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76 OnMemoryTree.NodeData data = m_tree.extractData(this);
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77 data.m_children.clear();
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78 OnMemoryNode newNode = m_tree.clonetree(this,data);
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79 if(newNode == null){
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80 m_children.clear();
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81 return this;
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82 }
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83 return newNode;
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84 }
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85
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86 @Override
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87 public Node removeChild(Node _child)
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88 {
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89 OnMemoryTree.NodeData data = m_tree.extractData(this);
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90 data.m_children.remove(_child);
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91 OnMemoryNode newNode = m_tree.clonetree(this,data);
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92 if(newNode == null){
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93 m_children.remove(_child);
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94 return this;
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95 }
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96 return newNode;
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97 }
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98
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99 @Override
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100 public Node setAttribute(String _attr,byte[] _value)
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101 {
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102 OnMemoryTree.NodeData data = m_tree.extractData(this);
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103 data.m_attrs.put(_attr,_value);
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104 OnMemoryNode newNode = m_tree.clonetree(this,data);
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105 if(newNode == null){
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106 m_attrs.put(_attr,_value);
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107 return this;
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108 }
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109 return newNode;
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110 }
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111
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112 @Override
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113 public Node setAttributeMap(Map<String,byte[]> _map)
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114 {
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115 OnMemoryTree.NodeData data = m_tree.extractData(this);
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116 data.m_attrs.putAll(_map);
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117 OnMemoryNode newNode = m_tree.clonetree(this,data);
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118 if(newNode == null){
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119 m_attrs.putAll(_map);
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120 return this;
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121 }
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122 return newNode;
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123 }
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124
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125 @Override
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126 public byte[] getAttribute(String _attr)
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127 {
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128 return m_attrs.get(_attr);
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129 }
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130
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131 @Override
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132 public Set<String> getAttributeKeys()
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133 {
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134 return m_attrs.keySet();
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135 }
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136
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137 @Override
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138 public Map<String, byte[]> getAttributeMap()
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139 {
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140 return Collections.unmodifiableMap(m_attrs);
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141 }
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142
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143 @Override
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144 public Set<Node> getChildren()
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145 {
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146 return Collections.unmodifiableSet(m_children);
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147 }
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148
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149 @Override
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150 public String toString()
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151 {
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152 return m_id.toString();
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153 }
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154
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155 @Override
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156 public boolean isChild(Node _child)
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157 {
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158 return m_children.contains(_child);
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159 }
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160
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161 @Override
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162 public Node useContents()
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163 {
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164 return m_tree.useContents();
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165 }
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166 }
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