/**
 * Interface for array holders.
 */
module.exports = new Class({
	Properties: {
/*	list: {
			type: Array
			,set: function (x) {
				this._list = x;
			}
			,get: function () {
				return this._list;
			}
		}
*/
	}

	,list: []

	,appendChild(child) {
		this.list.push(child);
	}

	/**
	 * Adds an element to the list.
	 * 
	 * @param {SqlObject} element The element to add
	 */
	,push(element) {
		this.list.push(element);
	}
	
	/**
	 * Removes an element from the list.
	 *
	 * @param {Number} i The element index
	 */
	,splice(i) {
		this.list.splice(i);
	}
	
	/**
	 * Adds an element to the list.
	 *
	 * @param {Number} i The element index
	 */
	,get(i) {
		return this.list[i];
	}

	,findHolders() {
		let ids = [];

		for (const object of this.list){
			holders = object.findHolders();
			if (holders) ids = ids.concat(holders);
		}

		return ids;
	}
});