/*
 * Created on Feb 15, 2005
 *
 */
package aima.games;

import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;

/**
 * @author Ravi Mohan
 * 
 */
public class GameState {
	private Hashtable<String,Object> state;

	// extends Hashtable{
	public GameState() {
		state = new Hashtable<String,Object>();
	}

	public boolean equals(Object anotherState) {

		if( this == anotherState ) {
			return true;
		}
		if((anotherState == null) || (this.getClass() != anotherState.getClass())){
			return false;
		}
		GameState another = (GameState) anotherState;
		Set keySet1 = state.keySet();
		Iterator i = keySet1.iterator();
		Iterator j = another.state.keySet().iterator();
		while (i.hasNext()) {
			String key = (String) i.next();
			boolean keymatched = false;
			boolean valueMatched = false;
			while (j.hasNext()) {
				String key2 = (String) j.next();
				if (key.equals(key2)) {
					keymatched = true;
					if (state.get(key).equals(another.state.get(key2))) {
						valueMatched = true;
					}
					break;
				}
			}
			if (!((keymatched) && valueMatched)) {
				return false;
			}
		}
		return true;
	}
	public int hashCode(){
		int result =17;
		for (String s : state.keySet()){
			result = 37 * result + s.hashCode();
			result = 37 * result + state.get(s).hashCode();
		}
		
		return result;
	}

	public Object get(String key) {
		return state.get(key);
	}

	public void put(String key,Object value) {
		state.put(key,value);
		
	}
}