/*
 * This class represents a collection of words.
 * It also supports the replaceMatches operation 
 * necesary to implement "censorship".
 */
public class Dictionary {

  private static final int MAX_SIZE = 1000;

  private String words[];

  // current size of dictionary
  private int count;

  public Dictionary() {
    words = new String[MAX_SIZE];
    count = 0;
  }

  // add a new word, provided that there is space.
  public void add(String s) {
    if (count < words.length) {
      words[count] = s;         
      count++;
    }
  }

  // replace all occurrences of each word
  // in the dictionary inside s with the
  // replacement string.
  public String replaceMatches(String text, String replaceWithText) {
    for (int i = 0; i < count; i++) {
      text = text.replaceAll(words[i], replaceWithText);
    }
    return text;
  }

  // returns the dictionary contents in a resonable form
  public String toString() {
    String res = "";
    for (int i = 0; i < count; i++) {
      res = res + words[i] + "\n";
    }
    return res;
  }
}