/**

 * Razvan's public code. Copyright 2008 based on Apache license (share alike) see LICENSE.txt for

 * details.

 */

package com.razie.pub.base.data;



import java.util.Iterator;

import java.util.List;



import org.json.JSONException;

import org.json.JSONObject;



/**

 * a simple pair of objects - use it as a quick tuple in lists or whatever...

 * 

 * @author razie

 */

@SuppressWarnings("unchecked")

public class Pair<A, B> {

    public A a;

    public B b;



    public Pair(A a, B b) {

        this.a = a;

        this.b = b;

    }



    /** convert a list of pairs to java - the Pair.a must be String */

    public static JSONObject toJson(List<Pair> list, JSONObject obj) {

        try {

            if (obj == null)

                obj = new JSONObject();

            for (Pair p : list) {

                obj.put((String) p.a, p.b);

            }

        } catch (JSONException e) {

            throw new RuntimeException(e);

        }

        return obj;

    }



    /** convert a list of pairs to java - the Pair.a must be String */

   public static List<Pair> fromJson(List<Pair> list, JSONObject obj) {

        try {

            for (Iterator i = obj.keys();i.hasNext();) {

                String s=(String)i.next();

                list.add(new Pair(s, obj.get(s)));

            }

        } catch (JSONException e) {

            throw new RuntimeException(e);

        }

        return list;

    }

}