1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/share/classes/com/sun/tools/javac/util/Assert.java Mon Jan 10 15:08:31 2011 -0800 1.3 @@ -0,0 +1,138 @@ 1.4 +/* 1.5 + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. Oracle designates this 1.11 + * particular file as subject to the "Classpath" exception as provided 1.12 + * by Oracle in the LICENSE file that accompanied this code. 1.13 + * 1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.17 + * version 2 for more details (a copy is included in the LICENSE file that 1.18 + * accompanied this code). 1.19 + * 1.20 + * You should have received a copy of the GNU General Public License version 1.21 + * 2 along with this work; if not, write to the Free Software Foundation, 1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.23 + * 1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.25 + * or visit www.oracle.com if you need additional information or have any 1.26 + * questions. 1.27 + */ 1.28 + 1.29 +package com.sun.tools.javac.util; 1.30 + 1.31 + 1.32 +/** 1.33 + * Simple facility for unconditional assertions. 1.34 + * The methods in this class are described in terms of equivalent assert 1.35 + * statements, assuming that assertions have been enabled. 1.36 + * 1.37 + * <p><b>This is NOT part of any supported API. 1.38 + * If you write code that depends on this, you do so at your own risk. 1.39 + * This code and its internal interfaces are subject to change or 1.40 + * deletion without notice.</b> 1.41 + */ 1.42 +public class Assert { 1.43 + /** Equivalent to 1.44 + * assert cond; 1.45 + */ 1.46 + public static void check(boolean cond) { 1.47 + if (!cond) 1.48 + error(); 1.49 + } 1.50 + 1.51 + /** Equivalent to 1.52 + * assert (o == null); 1.53 + */ 1.54 + public static void checkNull(Object o) { 1.55 + if (o != null) 1.56 + error(); 1.57 + } 1.58 + 1.59 + /** Equivalent to 1.60 + * assert (t != null); return t; 1.61 + */ 1.62 + public static <T> T checkNonNull(T t) { 1.63 + if (t == null) 1.64 + error(); 1.65 + return t; 1.66 + } 1.67 + 1.68 + /** Equivalent to 1.69 + * assert cond : value; 1.70 + */ 1.71 + public static void check(boolean cond, int value) { 1.72 + if (!cond) 1.73 + error(String.valueOf(value)); 1.74 + } 1.75 + 1.76 + /** Equivalent to 1.77 + * assert cond : value; 1.78 + */ 1.79 + public static void check(boolean cond, long value) { 1.80 + if (!cond) 1.81 + error(String.valueOf(value)); 1.82 + } 1.83 + 1.84 + /** Equivalent to 1.85 + * assert cond : value; 1.86 + */ 1.87 + public static void check(boolean cond, Object value) { 1.88 + if (!cond) 1.89 + error(String.valueOf(value)); 1.90 + } 1.91 + 1.92 + /** Equivalent to 1.93 + * assert cond : value; 1.94 + */ 1.95 + public static void check(boolean cond, String msg) { 1.96 + if (!cond) 1.97 + error(msg); 1.98 + } 1.99 + 1.100 + /** Equivalent to 1.101 + * assert (o == null) : value; 1.102 + */ 1.103 + public static void checkNull(Object o, Object value) { 1.104 + if (o != null) 1.105 + error(String.valueOf(value)); 1.106 + } 1.107 + 1.108 + /** Equivalent to 1.109 + * assert (o == null) : value; 1.110 + */ 1.111 + public static void checkNull(Object o, String msg) { 1.112 + if (o != null) 1.113 + error(msg); 1.114 + } 1.115 + 1.116 + /** Equivalent to 1.117 + * assert (o != null) : value; 1.118 + */ 1.119 + public static <T> T checkNonNull(T t, String msg) { 1.120 + if (t == null) 1.121 + error(msg); 1.122 + return t; 1.123 + } 1.124 + 1.125 + /** Equivalent to 1.126 + * assert false; 1.127 + */ 1.128 + public static void error() { 1.129 + throw new AssertionError(); 1.130 + } 1.131 + 1.132 + /** Equivalent to 1.133 + * assert false : msg; 1.134 + */ 1.135 + public static void error(String msg) { 1.136 + throw new AssertionError(msg); 1.137 + } 1.138 + 1.139 + /** Prevent instantiation. */ 1.140 + private Assert() { } 1.141 +}