001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
006     *
007     * Project Info:  http://www.jfree.org/jfreechart/index.html
008     *
009     * This library is free software; you can redistribute it and/or modify it
010     * under the terms of the GNU Lesser General Public License as published by
011     * the Free Software Foundation; either version 2.1 of the License, or
012     * (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but
015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017     * License for more details.
018     *
019     * You should have received a copy of the GNU Lesser General Public
020     * License along with this library; if not, write to the Free Software
021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
022     * USA.
023     *
024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025     * in the United States and other countries.]
026     *
027     * ---------------
028     * DomainInfo.java
029     * ---------------
030     * (C) Copyright 2000-2009, by Object Refinery Limited.
031     *
032     * Original Author:  David Gilbert (for Object Refinery Limited);
033     * Contributor(s):   -;
034     *
035     * Changes (from 18-Sep-2001)
036     * --------------------------
037     * 18-Sep-2001 : Added standard header and fixed DOS encoding problem (DG);
038     * 15-Nov-2001 : Moved to package com.jrefinery.data.* (DG);
039     *               Updated Javadoc comments (DG);
040     * 22-Apr-2002 : Added getValueRange() method (DG);
041     * 12-Jul-2002 : Renamed getValueRange() --> getDomainRange() (DG);
042     * 06-Oct-2004 : Renamed getDomainRange() --> getDomainBounds() (DG);
043     * 17-Nov-2004 : Added 'includeInterval' argument to all methods (DG);
044     * 11-Jan-2005 : Removed deprecated code in preparation for the 1.0.0
045     *               release (DG);
046     *
047     */
048    
049    package org.jfree.data;
050    
051    /**
052     * An interface (optional) that can be implemented by a dataset to assist in
053     * determining the minimum and maximum values.
054     */
055    public interface DomainInfo {
056    
057        /**
058         * Returns the minimum x-value in the dataset.
059         *
060         * @param includeInterval  a flag that determines whether or not the
061         *                         x-interval is taken into account.
062         *
063         * @return The minimum value.
064         */
065        public double getDomainLowerBound(boolean includeInterval);
066    
067        /**
068         * Returns the maximum x-value in the dataset.
069         *
070         * @param includeInterval  a flag that determines whether or not the
071         *                         x-interval is taken into account.
072         *
073         * @return The maximum value.
074         */
075        public double getDomainUpperBound(boolean includeInterval);
076    
077        /**
078         * Returns the range of the values in this dataset's domain.
079         *
080         * @param includeInterval  a flag that determines whether or not the
081         *                         x-interval is taken into account.
082         *
083         * @return The range (or <code>null</code> if the dataset contains no
084         *     values).
085         */
086        public Range getDomainBounds(boolean includeInterval);
087    
088    }