package jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger;

import java.util.Iterator;
import fj.data.List;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.Operation;

public class DefaultLogger implements Logger
{
	private final List<Operation> log;
	
	private static final List<Operation> EMPTY = List.nil();
	
	public DefaultLogger()
	{
		this(EMPTY);
	}
	
	private DefaultLogger(List<Operation> _log)
	{
		log = _log;
	}

	@Override
	public Iterator<Operation> iterator()
	{
		return log.iterator();
	}

	@Override
	public Logger add(Operation _op)
	{
		return new DefaultLogger(log.cons(_op));
	}
}