1 /* =========================================================== 2 * JFreeChart : a free chart library for the Java(tm) platform 3 * =========================================================== 4 * 5 * (C) Copyright 2000-2013, 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 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 25 * Other names may be trademarks of their respective owners.] 26 * 27 * ---------------- 28 * ParamChecks.java 29 * ---------------- 30 * (C) Copyright 2011, by Object Refinery Limited. 31 * 32 * Original Author: David Gilbert (for Object Refinery Limited); 33 * Contributor(s): -; 34 * 35 * Changes 36 * ------- 37 * 16-Oct-2011 : Version 1 (DG); 38 * 39 */ 40 41 package org.jfree.chart.util; 42 43 /** 44 * A utility class for checking parameters. 45 * 46 * @since 1.0.14 47 */ 48 public class ParamChecks { 49 50 /** 51 * Throws an <code>IllegalArgumentException</code> if the supplied 52 * <code>param</code> is <code>null</code>. 53 * 54 * @param param the parameter to check (<code>null</code> permitted). 55 * @param name the name of the parameter (to use in the exception message 56 * if <code>param</code> is <code>null</code>). 57 * 58 * @throws IllegalArgumentException if <code>param</code> is 59 * <code>null</code>. 60 * 61 * @since 1.0.14 62 */ nullNotPermitted(Object param, String name)63 public static void nullNotPermitted(Object param, String name) { 64 if (param == null) { 65 throw new IllegalArgumentException("Null '" + name + "' argument."); 66 } 67 } 68 } 69