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1 package jp.ac.u_ryukyu.ie.cr.tatsuki.jungle.store.index;
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2
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3 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
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4 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.TreeMapOrd;
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5 import fj.data.Option;
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6 import fj.data.TreeMap;
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7
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8 public class ParentIndex {
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9
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10 private final TreeMap<TreeNode, TreeNode> parentIndex;
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11
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12 public ParentIndex() {
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13 parentIndex = TreeMap.empty(TreeMapOrd.treeNodeOrd);
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14 }
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15
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16 public ParentIndex(TreeMap<TreeNode, TreeNode> parentIndex) {
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17 this.parentIndex = parentIndex;
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18 }
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19
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20 public ParentIndex(ParentIndex parentIndex) {
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21 this.parentIndex = parentIndex.getParentIndex();
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22 }
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23
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24 private TreeMap<TreeNode, TreeNode> getParentIndex() {
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25 return parentIndex;
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26 }
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27
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28 public Option<TreeNode> get(TreeNode child) {
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29 Option<TreeNode> parentOp = parentIndex.get(child);
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30 return parentOp;
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31 }
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32
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33 public ParentIndex set(TreeNode child, TreeNode parent){
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34 TreeMap<TreeNode, TreeNode> newParentIndex = parentIndex.set(child,parent);
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35 return new ParentIndex(newParentIndex);
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36 }
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37
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38 public ParentIndex delete(TreeNode child) {
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39 TreeMap<TreeNode, TreeNode> newParentIndex = parentIndex.delete(child);
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40 return new ParentIndex(newParentIndex);
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41 }
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42
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43 }
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