package list.dl.algo;

import list.dl.DLList;

/**
* Returns the left end list.
*/
public class GetLeftEnd implements IAlgoLeft
{
	final public static GetLeftEnd Singleton = new GetLeftEnd();

	private GetLeftEnd()
	{
	}

	/**
	 * @param hostList 
	 * @param inputParam
	 * @return 
	 */
	public Object leftEndCase(DLList hostList, Object inputParam)
	{
		return hostList;
	}

	/**
	 * @param hostList
	 * @param inputParam 
	 * @return 
	 */
	public Object dataNodeCase(DLList hostList, Object inputParam)
	{
		return hostList.getLeftRest ().executeLeft (this, null);
	}
}