////  OpenForecast - open source, general-purpose forecasting package.//  Copyright (C) 2002-2003  Steven R. Gould////  This library is free software; you can redistribute it and/or//  modify it under the terms of the GNU Lesser General Public//  License as published by the Free Software Foundation; either//  version 2.1 of the License, or (at your option) any later version.////  This library is distributed in the hope that it will be useful,//  but WITHOUT ANY WARRANTY; without even the implied warranty of//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU//  Lesser General Public License for more details.////  You should have received a copy of the GNU Lesser General Public//  License along with this library; if not, write to the Free Software//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA//package net.sourceforge.openforecast.input;import net.sourceforge.openforecast.DataSet;/** * An interface that defines the minimal requirements for a class to be * considered a "builder". This serves to bring some consistency between * the potentially very different builder classes. * * <p>A class that implements the Builder interface generally provides some * means of obtaining data and using that data to build a DataSet - a * collection of DataPoints - or, in some cases, a single DataPoint from that * data. * @author Steven R. Gould * @since 0.4 */public interface Builder{	/**	 * Retrieves a DataSet - a collection of DataPoints - from the current	 * input source. The DataSet should contain all DataPoints defined by	 * the input source.	 * @return a DataSet built from the current input source.	 * @throws Exception if an error occurred reading from the input source.	 */	public DataSet build()		throws Exception;}