/**
 * Holds a plain key-value javascript object and monitorizes
 * changes over it.
 */
module.exports = new Class
({
	Properties:
	{
		/**
		 * The internal object with the params.
		 */
		params:
		{ 
			type: Object
		}
	}

	/**
	 * Gets a value from the set.
	 *
	 * @param {String} field The field name
	 * @return {*} The field value
	 */
	,get: function () {}

	/**
	 * Sets a value on the set.
	 *
	 * @param {String} field The field name
	 * @param {*} value The new field value
	 */
	,set: function () {}

	/**
	 * Returns an array with the set keys.
	 * 
	 * @return {Array} The set keys
	 */
	,keys: function () {}

	/**
	 * Emits the 'change' signal on the set.
	 */
	,changed: function ()
	{
		this.emit ('change');
	}

	/**
	 * Copies all values from another set.
	 *
	 * @param {Object} object The source object
	 */
	,assign: function (object)
	{
		for (var key in object)
			this.set (key, object[key]);

		this.changed ();
	}

	/**
	 * Copies all values from another lot.
	 *
	 * @param {LotIface} lot The source lot
	 */
	,assignLot: function (lot)
	{
		this.assign (lot.params);
	}
});