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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: * Values.java 29: * ----------- 30: * (C) Copyright 2001-2007, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * Changes: 36: * -------- 37: * 08-Nov-2001 : Version 1 (DG); 38: * 23-Oct-2002 : Renamed getValueCount --> getItemCount (DG);# 39: * ------------- JFREECHART 1.0.x --------------------------------------------- 40: * 02-May-2006 : Updated API docs (DG); 41: * 42: */ 43: 44: package org.jfree.data; 45: 46: /** 47: * An interface through which (single-dimension) data values can be accessed. 48: */ 49: public interface Values { 50: 51: /** 52: * Returns the number of items (values) in the collection. 53: * 54: * @return The item count (possibly zero). 55: */ 56: public int getItemCount(); 57: 58: /** 59: * Returns the value with the specified index. 60: * 61: * @param index the item index (in the range <code>0</code> to 62: * <code>getItemCount() - 1</code>). 63: * 64: * @return The value (possibly <code>null</code>). 65: * 66: * @throws IndexOutOfBoundsException if <code>index</code> is not in the 67: * specified range. 68: */ 69: public Number getValue(int index); 70: 71: }