/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ---------------
* TimePeriod.java
* ---------------
* (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 10-Jan-2003 : Version 1 (DG);
* 13-Mar-2003 : Moved to com.jrefinery.data.time package (DG);
* 27-Jan-2005 : Implemented Comparable (DG);
*
*/
package org.jfree.data.time;
import java.util.Date;
/**
* A period of time measured to millisecond precision using two instances of
* <code>java.util.Date</code>.
*/
public interface TimePeriod extends Comparable {
/**
* Returns the start date/time. This will always be on or before the
* end date.
*
* @return The start date/time (never <code>null</code>).
*/
public Date getStart();
/**
* Returns the end date/time. This will always be on or after the
* start date.
*
* @return The end date/time (never <code>null</code>).
*/
public Date getEnd();
}
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