import java.util.*;

import java.io.*;

/**

* @author Mike Zastre, UVic

*

* Part of CSC 115, Summer 2015, Assignment #5

*/

public class WordReference {

public static BSTRefBased rawRefs(String filename) {

BSTRefBased result = new BSTRefBased();

try {

Scanner scanner = new Scanner(new File(filename));

int lineNum = 1;

while (scanner.hasNext()) {

String line = scanner.nextLine();

line = line.trim();

line = line.replaceAll("\\p{Punct}+", "");

if (line.equals("")) {

continue;

}

String words[] = line.split("\\s+");

for (String w : words) {

String ww = w.toLowerCase();

WordRefs wf = result.retrieve(ww);

if (wf == null) {

result.insert(ww);

wf = result.retrieve(ww);

}

wf.addLine(lineNum);

}

lineNum++;

}

} catch (IOException ioe) {

System.err.println(ioe.getMessage());

System.exit(1);

} catch (NullPointerException npe) {

System.err.println("One of the tree routines created a " +

"null pointer exception");

System.exit(2);

}

return result;

}

public static void filterRefs(BSTRefBased tree, String words[]) {

for (String w : words) {

tree.delete(w);

}

}

public static void reportRefs(BSTRefBased tree) {

for (WordRefs wf : tree) {

System.out.println(wf.toString());

}

}

public static void main(String args[]) {

BSTRefBased t;

String exclude[] = {"a", "the", "i", "it", "is"};

if (args.length < 1) {

System.err.println("Usage: provide an input filename");

System.exit(1);

}

t = rawRefs(args[0]);

filterRefs(t, exclude);

reportRefs(t);

}

}