// containers/CountedString26.java
// TIJ4 Chapter Containers, Exercise 26, page 858
/* Add a char field to CountedString that is also initialized in the 
* constructor; and modify the hashCode() and equals() methods to 
* include the value of this char.
*/

/* This is my solution to one of the exercises in 
* Thinking in Java 4th Edition (by Bruce Eckel).
* It compiles and runs correctly using JDK 1.6.0
* @author Greg Gordon
* @author www.greggordon.org
* December, 2007
*/

import java.util.*;
import static net.mindview.util.Print.*;

public class CountedString26 {
	private static List<String> created =
		new ArrayList<String>();
	private String s;
	private int id = 0;
	private char c;
	public CountedString26(String str, char ch) {
		s = str;
		c = ch;
		created.add(s);
		for(String s2 : created)
			if(s2.equals(s)) id++;
	}
	public String toString() {
		return "String: " + s + " id: " + id + ", c: " + c  +
			", hashCode(): " + hashCode();
	}
	public int hashCode() {
		int result = 17;
		result = 37 * result + s.hashCode();
		result = 37 * result + id;
		result = 37 * result + c;
		return result;
	}	
	public boolean equals(Object o) {
		return o instanceof CountedString26 &&
			s.equals(((CountedString26)o).s) &&
			id == ((CountedString26)o).id &&
			c == ((CountedString26)o).c;
		}
	public static void main(String[] args) {
		Map<CountedString26,Integer> map =
			new HashMap<CountedString26,Integer>();
		CountedString26[] cs = new CountedString26[5];
		for(int i = 0; i < cs.length; i++) {
			cs[i] = new CountedString26("hi", 'x');
			map.put(cs[i], i); // Autobox int -> Integer
		}
		print(map);
		for(CountedString26 cstring : cs) {
			print("Looking up " + cstring);
			print(map.get(cstring));
		}	
		
	}
}