Frames | No Frames |
1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jfreechart/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * --------------- 28: * TimePeriod.java 29: * --------------- 30: * (C) Copyright 2003-2007, by Object Refinery Limited and Contributors. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * Changes 36: * ------- 37: * 10-Jan-2003 : Version 1 (DG); 38: * 13-Mar-2003 : Moved to com.jrefinery.data.time package (DG); 39: * 27-Jan-2005 : Implemented Comparable (DG); 40: * 41: */ 42: 43: package org.jfree.data.time; 44: 45: import java.util.Date; 46: 47: /** 48: * A period of time measured to millisecond precision using two instances of 49: * <code>java.util.Date</code>. 50: */ 51: public interface TimePeriod extends Comparable { 52: 53: /** 54: * Returns the start date/time. This will always be on or before the 55: * end date. 56: * 57: * @return The start date/time (never <code>null</code>). 58: */ 59: public Date getStart(); 60: 61: /** 62: * Returns the end date/time. This will always be on or after the 63: * start date. 64: * 65: * @return The end date/time (never <code>null</code>). 66: */ 67: public Date getEnd(); 68: 69: }