public JSONObject toJson() {
		JSONObject rtn = new JSONObject();
		try
		{
			rtn.put("id", this.getId());
			rtn.put("name", this.name);
			rtn.put("capacity", this.capacity);
		} catch (JSONException e)
		{
			// TODO Auto-generated catch block
			e.printStackTrace();
		}															
		
		return rtn;
	}