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package project3;
class AnagramTree {
private TreeNode head;
private class TreeNode {
private byte[] summary;
private WordNode words;
private TreeNode left, right;
private TreeNode(String word, byte[] summary) {
words = new WordNode(word);
this.summary = summary;
left = null; right = null;
}
}
private class WordNode {
private String word;
private WordNode next;
private WordNode(String word) {
this.word = word;
next = null;
}
}
public AnagramTree() {
head = new TreeNode("e", stringToSummary("e"));
}
public void add (String word) {
byte [] newSumm = new byte [26];
newSumm = stringToSummary(word);
TreeNode top = head, bottomR = head.right, bottomL = head.left;
// boolean goLeft = false;
try { while (true) {
int comp = compareSummaries(top.summary, newSumm);
if (comp < 0) { // left is less than right, go left
top = bottomL;
// goLeft = true;
bottomL = bottomL.left;
} else if (comp > 0) { // right is less, go right
top = bottomR;
// goLeft = false;
bottomR = bottomR.right;
} else {
top.words.next = new WordNode(word);
}
}} catch (NullPointerException ignore) {
top = new TreeNode(word, newSumm);
}
}
public void anagrams() {
findAnagrams(head.left);
findAnagrams(head.right); //e should be lower than other words as it is e
}
private void findAnagrams(TreeNode subtree) {
try { while (true) {
findAnagrams(subtree.right);
findAnagrams(subtree.left);
} } catch (NullPointerException ignore) { /* Do nothing */}
}
public String toString() {
StringBuilder builder = new StringBuilder();
return builder.toString();
}
private int compareSummaries(byte[] left, byte[] right) {
for (int i = 0; i < 25; i++) {
if (left[i] != right[i]) {
return left[i] - right[i];
}
}
return 0;
}
private byte[] stringToSummary(String word) {
byte[] temp = new byte[26];
for (byte i = 0; i < word.length(); i++) {
temp[word.charAt(i) - 'a'] += 1;
}
return temp;
}
}
class Anagrammer {
public static void main(String[] args) {
Words words = new Words(args[0]);
AnagramTree anagrams = new AnagramTree();
while (words.hasNext()) {
anagrams.add(words.next());
}
}
}
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