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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 java.util.Iterator;
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4
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5
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6 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
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7 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNodeChildren;
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8 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.TreeMapOrd;
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9 import fj.data.Option;
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10 import fj.data.TreeMap;
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11
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12 public class ParentIndex {
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13
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14 private TreeMap<TreeNode, TreeNode> parentIndex;
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15
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16 public ParentIndex() {
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17 parentIndex = TreeMap.empty(TreeMapOrd.treeNodeOrd);
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18 }
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19
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20 public ParentIndex(TreeMap<TreeNode, TreeNode> parentIndex) {
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21 this.parentIndex = parentIndex;
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22 }
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23
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24 public boolean isEmpty(){
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25 return parentIndex.isEmpty();
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26 }
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27
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28 public ParentIndex(ParentIndex parentIndex) {
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29 this.parentIndex = parentIndex.getParentIndex();
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30 }
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31
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32 public TreeMap<TreeNode, TreeNode> getParentIndex() {
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33 return parentIndex;
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34 }
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35
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36 public TreeNode get(TreeNode child) {
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37 Option<TreeNode> parentOp = parentIndex.get(child);
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38 if (parentOp.isSome())
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39 return parentOp.some();
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40 return null;
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41 }
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42
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43 public ParentIndex set(TreeNode parent) {
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44 Iterator<TreeNode> childrenIterator = parent.getChildren().iterator();
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45 for (; childrenIterator.hasNext();) {
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46 TreeNode child = childrenIterator.next();
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47 parentIndex = parentIndex.set(child, parent);
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48 }
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49 return this;
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50 }
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51
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52 public ParentIndex delete(TreeNode child) {
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53 parentIndex = parentIndex.delete(child);
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54 return this;
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55 }
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56
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57 public ParentIndex deleteAllChildren(TreeNode parentNode) {
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58 TreeNodeChildren children = parentNode.getChildren();
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59 Iterator<TreeNode> childrenIterator = children.iterator();
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60 for (; childrenIterator.hasNext();) {
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61 TreeNode child = childrenIterator.next();
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62 parentIndex = parentIndex.delete(child);
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63 }
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64 return this;
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65 }
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66
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67 public ParentIndex addAllChildren(TreeNode parentNode) {
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68 TreeNodeChildren children = parentNode.getChildren();
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69 Iterator<TreeNode> childrenIterator = children.iterator();
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70 for (; childrenIterator.hasNext();) {
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71 TreeNode child = childrenIterator.next();
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72 parentIndex = parentIndex.set(child, parentNode);
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73 }
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74 return this;
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75 }
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76
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77 }
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