001/* ===========================================================
002 * Orson Charts : a 3D chart library for the Java(tm) platform
003 * ===========================================================
004 * 
005 * (C)opyright 2013-2022, by David Gilbert.  All rights reserved.
006 * 
007 * https://github.com/jfree/orson-charts
008 * 
009 * This program is free software: you can redistribute it and/or modify
010 * it under the terms of the GNU General Public License as published by
011 * the Free Software Foundation, either version 3 of the License, or
012 * (at your option) any later version.
013 *
014 * This program is distributed in the hope that it will be useful,
015 * but WITHOUT ANY WARRANTY; without even the implied warranty of
016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
017 * GNU General Public License for more details.
018 *
019 * You should have received a copy of the GNU General Public License
020 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
021 * 
022 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
023 * Other names may be trademarks of their respective owners.]
024 * 
025 * If you do not wish to be bound by the terms of the GPL, an alternative
026 * commercial license can be purchased.  For details, please see visit the
027 * Orson Charts home page:
028 * 
029 * http://www.object-refinery.com/orsoncharts/index.html
030 * 
031 */
032
033package org.jfree.chart3d.interaction;
034
035import org.jfree.chart3d.data.xyz.XYZDataset;
036import org.jfree.chart3d.data.xyz.XYZItemKey;
037
038/**
039 * An object representing a selection of items from an {@link XYZDataset}.
040 */
041public interface XYZDataItemSelection<S extends Comparable<S>> {
042   
043    /**
044     * Returns {@code true} if the specified item is present in the 
045     * selection, and {@code false} otherwise.
046     * 
047     * @param item  the item key ({@code null} not permitted).
048     * 
049     * @return A boolean. 
050     */
051    boolean isSelected(XYZItemKey<S> item);
052
053}