-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathSplayTree.java
More file actions
216 lines (165 loc) · 4.52 KB
/
SplayTree.java
File metadata and controls
216 lines (165 loc) · 4.52 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
package SplayTree;
public class SplayTree<T extends Comparable<T>> implements Tree<T> {
private int size;
private Node<T> rootNode;
@Override
public void insert(T data) {
Node<T> tempNode = this.rootNode;
Node<T> parentNode = null;
while (tempNode != null) {
parentNode = tempNode;
if (tempNode.getData().compareTo(data) < 0) {
tempNode = tempNode.getRightNode();
} else {
tempNode = tempNode.getLeftNode();
}
}
tempNode = new Node<T>(data);
tempNode.setParentNode(parentNode);
if (parentNode == null) {
this.rootNode = tempNode;
} else if (parentNode.getData().compareTo(tempNode.getData()) < 0) {
parentNode.setRightNode(tempNode);
} else {
parentNode.setLeftNode(tempNode);
}
splay(tempNode);
this.size++;
}
@Override
public void inOrderTraversal() {
if (this.rootNode != null) {
inOrderTraversal(rootNode);
}
}
private void inOrderTraversal(Node<T> node) {
if (node.getLeftNode() != null) {
inOrderTraversal(node.getLeftNode());
}
System.out.print(node + " ");
if (node.getRightNode() != null) {
inOrderTraversal(node.getRightNode());
}
}
@Override
public T getMin() {
if (this.rootNode != null) {
return getMin(rootNode);
}
return null;
}
private T getMin(Node<T> node) {
if (node.getLeftNode() != null) {
return getMin(node.getLeftNode());
} else {
return node.getData();
}
}
@Override
public T getMax() {
if (this.rootNode != null) {
return getMax(rootNode);
}
return null;
}
private T getMax(Node<T> node) {
if (node.getRightNode() != null) {
return getMax(node.getRightNode());
} else {
return node.getData();
}
}
public void printRoot() {
System.out.println(rootNode);
}
public boolean isEmpty() {
return this.rootNode == null;
}
public int size() {
return this.size;
}
@Override
public Node<T> find(T data) {
Node<T> tempNode = this.rootNode;
while (tempNode != null) {
if (tempNode.getData().compareTo(data) < 0) {
tempNode = tempNode.getRightNode();
} else if (tempNode.getData().compareTo(data) > 0) {
tempNode = tempNode.getLeftNode();
} else {
splay(tempNode);
return tempNode;
}
}
splay(tempNode);
return null;
}
private void rotateLeft(Node<T> node) {
Node<T> tempNode = node.getRightNode();
if (tempNode != null) {
node.setRightNode(tempNode.getLeftNode());
if (tempNode.getLeftNode() != null) {
tempNode.getLeftNode().setParentNode(node);
}
tempNode.setParentNode(node.getParentNode());
}
if (node.getParentNode() == null) {
this.rootNode = tempNode;
} else if (node == node.getParentNode().getLeftNode()) {
node.getParentNode().setLeftNode(tempNode);
} else {
node.getParentNode().setRightNode(tempNode);
}
if (tempNode != null) {
tempNode.setLeftNode(node);
}
node.setParentNode(tempNode);
}
private void rotateRight(Node<T> node) {
Node<T> tempNode = node.getLeftNode();
if (tempNode != null) {
node.setLeftNode(tempNode.getRightNode());
if (tempNode.getRightNode() != null) {
tempNode.getRightNode().setParentNode(node);
}
tempNode.setParentNode(node.getParentNode());
}
if (node.getParentNode() == null) {
this.rootNode = tempNode;
} else if (node == node.getParentNode().getLeftNode()) {
node.getParentNode().setLeftNode(tempNode);
} else {
node.getParentNode().setRightNode(tempNode);
}
if (tempNode != null) {
tempNode.setRightNode(node);
}
node.setParentNode(tempNode);
}
private void splay(Node<T> node) {
while (node.getParentNode() != null) {
if (node.getParentNode().getParentNode() == null) {
if (node.getParentNode().getLeftNode() == node) {
rotateRight(node.getParentNode());
} else {
rotateLeft(node.getParentNode());
}
} else if (node.getParentNode().getLeftNode() == node
&& node.getParentNode().getParentNode().getLeftNode() == node.getParentNode()) {
rotateRight(node.getParentNode().getParentNode());
rotateRight(node.getParentNode());
} else if (node.getParentNode().getRightNode() == node
&& node.getParentNode().getParentNode().getRightNode() == node.getParentNode()) {
rotateLeft(node.getParentNode().getParentNode());
rotateLeft(node.getParentNode());
} else if (node.getParentNode().getLeftNode() == node
&& node.getParentNode().getParentNode().getRightNode() == node.getParentNode()) {
rotateRight(node.getParentNode());
rotateLeft(node.getParentNode());
} else {
rotateLeft(node.getParentNode());
rotateRight(node.getParentNode());
}
}
}
}