    001    /* ===========================================================
    002     * JFreeChart : a free chart library for the Java(tm) platform
    003     * ===========================================================
    004     *
    005     * (C) Copyright 2000-2007, 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     * CombinationDataset.java
    029     * -----------------------
    030     * (C) Copyright 2001-2007, by Bill Kelemen.
    031     *
    032     * Original Author:  Bill Kelemen;
    033     * Contributor(s):   -;
    034     *
    035     * Changes
    036     * -------
    037     * 06-Dec-2001 : Version 1 (BK);
    038     * ------------- JFREECHART 1.0.x ---------------------------------------------
    039     * 02-Feb-2007 : Removed author tags from all over JFreeChart sources (DG);
    040     *
    041     */
    042
    043    package org.jfree.data.general;
    044
    045    /**
    046     * Interface that describes the new methods that any combined dataset needs to
    047     * implement. A combined dataset object will combine one or more datasets and
    048     * expose a sub-set or union of the combined datasets.
    049     */
    050    public interface CombinationDataset {
    051
    052        ///////////////////////////////////////////////////////////////////////////
    053        // New methods from CombinationDataset
    054        ///////////////////////////////////////////////////////////////////////////
    055
    056        /**
    057         * Returns the parent Dataset of this combination. If there is more than
    058         * one parent, or a child is found that is not a combination, then returns
    059         * <code>null</code>.
    060         *
    061         * @return The parent Dataset of this combination.
    062         */
    063        public SeriesDataset getParent();
    064
    065        /**
    066         * Returns a map or indirect indexing form our series into parent's series.
    067         *
    068         * @return A map or indirect indexing form our series into parent's series.
    069         */
    070        public int[] getMap();
    071
    072    }