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 Wed Apr 27 01:34:52 2016 +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 +}
