/*
 * DCollection.java
 * Copyright (c) 2005 by University of Hamburg. All Rights Reserved.
 * Departament of Informatics. 
 * Distributed Systems and Information Systems.
 *
 * Created by walczak on Dec 5, 2005.  
 * Last revision $Revision: 6926 $ by:
 * $Author: braubach $ on $Date: 2008-09-28 22:16:58 +0200 (So, 28 Sep 2008) $.
 */
package nuggets.delegate;

import java.util.List;

import nuggets.IAssembler;
import nuggets.IDelayedOperation;
import nuggets.InstanceNotAvailableException;


/** DCollection 
 * @author walczak
 * @since  Dec 5, 2005
 */
public class DList extends DCollection
{
	/** 
	 * @param clazz
	 * @param asm
	 * @return clazz.newInstance();
	 * @throws Exception
	 */
	public Object getInstance(Class clazz, IAssembler asm) throws Exception
	{
		return clazz.newInstance();
	}


	/** 
	 * @param obj
	 * @param asm
	 * @throws Exception
	 * @see nuggets.delegate.ADelegate#assemble(java.lang.Object, nuggets.IAssembler)
	 */
	public void assemble(Object obj, IAssembler asm) throws Exception
	{
		List l = (List)obj;
		int i = 0;
		String token;
		while((token = asm.nextToken()) != null)
		{
			try {
				l.add(asm.getValue(token));
			} catch(InstanceNotAvailableException nae) {
				asm.delay(new ListDelayedAdd(l, i, token));
			}
			i++;
		}
	}

	/** ArrayDelayedSet 
	 * @author walczak
	 * @since  Jan 19, 2006
	 */
	public static final class ListDelayedAdd implements IDelayedOperation
	{
		private final int	i;

		private final String	id;

		private final List	l;

		/** 
		 * Constructor for ArrayDelayedSet.
		 * @param l
		 * @param i
		 * @param id
		 */
		public ListDelayedAdd(List l, int i, String id)
		{
			this.l = l;
			this.i = i;
			this.id = id;
		}

		/** 
		 * @param asm
		 * @throws Exception
		 * @see nuggets.IDelayedOperation#perform(nuggets.IAssembler)
		 */
		public void perform(IAssembler asm) throws Exception
		{
			l.add(i, asm.getValue(id));
		}
	}


}