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1 package jp.ac.u_ryukyu.ie.cr.jungle.store.index;
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2
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3 import jp.ac.u_ryukyu.ie.cr.jungle.store.impl.TreeNode;
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4 import jp.ac.u_ryukyu.ie.cr.jungle.store.impl.TreeNodeChildren;
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5 import jp.ac.u_ryukyu.ie.cr.jungle.data.treemap.TreeMap;
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6
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7 import java.util.Iterator;
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8
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9 public class ParentIndex {
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10
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11 private TreeMap<TreeNode, TreeNode> parentIndex;
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12
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13 public ParentIndex() {
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14 parentIndex = new TreeMap<>();
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15 }
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16
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17 public boolean isEmpty(){
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18 return parentIndex.isEmpty();
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19 }
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20
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21 public TreeNode get(TreeNode child) {
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22 return parentIndex.get(child).get();
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23 }
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24
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25 public ParentIndex set(TreeNode parent ,TreeNode child) {
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26 parentIndex = parentIndex.put(child, parent);
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27 return this;
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28 }
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29
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30 public ParentIndex delete(TreeNode child) {
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31 parentIndex = parentIndex.delete(child);
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32 return this;
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33 }
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34
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35 public ParentIndex deleteAllChildren(TreeNode parentNode) {
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36 TreeNodeChildren children = parentNode.getChildren();
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37 Iterator<TreeNode> childrenIterator = children.iterator();
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38 for (; childrenIterator.hasNext();) {
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39 TreeNode child = childrenIterator.next();
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40 parentIndex = parentIndex.delete(child);
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41 }
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42 return this;
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43 }
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44
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45 public ParentIndex addAllChildren(TreeNode parentNode) {
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46 TreeNodeChildren children = parentNode.getChildren();
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47 Iterator<TreeNode> childrenIterator = children.iterator();
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48 for (; childrenIterator.hasNext();) {
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49 TreeNode child = childrenIterator.next();
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50 parentIndex = parentIndex.put(child, parentNode);
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51 }
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52 return this;
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53 }
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54
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55 }
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