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.data; 034 035/** 036 * A generic representation of a one dimensional list of data values. 037 * 038 * @param <T> The value type. 039 */ 040public interface Values<T> { 041 042 /** 043 * Returns the number of items in the dataset. 044 * 045 * @return The number of items in the dataset. 046 */ 047 int getItemCount(); 048 049 /** 050 * Returns the value for the specified item. 051 * 052 * @param item the item index. 053 * 054 * @return The value for the specified item (possibly {@code null}). 055 */ 056 T getValue(int item); 057 058 /** 059 * Returns the value for the specified item as a double primitive, provided 060 * that the data type is a subclass of {@code Number}. Where 061 * the {@link #getValue(int)} method returns {@code null}, this method 062 * returns {@code Double.NaN}. 063 * 064 * @param item the item index. 065 * 066 * @return The value for the specified item. 067 */ 068 double getDoubleValue(int item); 069 070}