Mercurial > jdk8-mips64-public > langtools / file comparison

comparison: src/share/classes/com/sun/tools/javac/util/Assert.java

src/share/classes/com/sun/tools/javac/util/Assert.java

changeset 816
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1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.util;
27
28
29 /**
30 * Simple facility for unconditional assertions.
31 * The methods in this class are described in terms of equivalent assert
32 * statements, assuming that assertions have been enabled.
33 *
34 * <p><b>This is NOT part of any supported API.
35 * If you write code that depends on this, you do so at your own risk.
36 * This code and its internal interfaces are subject to change or
37 * deletion without notice.</b>
38 */
39 public class Assert {
40 /** Equivalent to
41 * assert cond;
42 */
43 public static void check(boolean cond) {
44 if (!cond)
45 error();
46 }
47
48 /** Equivalent to
49 * assert (o == null);
50 */
51 public static void checkNull(Object o) {
52 if (o != null)
53 error();
54 }
55
56 /** Equivalent to
57 * assert (t != null); return t;
58 */
59 public static <T> T checkNonNull(T t) {
60 if (t == null)
61 error();
62 return t;
63 }
64
65 /** Equivalent to
66 * assert cond : value;
67 */
68 public static void check(boolean cond, int value) {
69 if (!cond)
70 error(String.valueOf(value));
71 }
72
73 /** Equivalent to
74 * assert cond : value;
75 */
76 public static void check(boolean cond, long value) {
77 if (!cond)
78 error(String.valueOf(value));
79 }
80
81 /** Equivalent to
82 * assert cond : value;
83 */
84 public static void check(boolean cond, Object value) {
85 if (!cond)
86 error(String.valueOf(value));
87 }
88
89 /** Equivalent to
90 * assert cond : value;
91 */
92 public static void check(boolean cond, String msg) {
93 if (!cond)
94 error(msg);
95 }
96
97 /** Equivalent to
98 * assert (o == null) : value;
99 */
100 public static void checkNull(Object o, Object value) {
101 if (o != null)
102 error(String.valueOf(value));
103 }
104
105 /** Equivalent to
106 * assert (o == null) : value;
107 */
108 public static void checkNull(Object o, String msg) {
109 if (o != null)
110 error(msg);
111 }
112
113 /** Equivalent to
114 * assert (o != null) : value;
115 */
116 public static <T> T checkNonNull(T t, String msg) {
117 if (t == null)
118 error(msg);
119 return t;
120 }
121
122 /** Equivalent to
123 * assert false;
124 */
125 public static void error() {
126 throw new AssertionError();
127 }
128
129 /** Equivalent to
130 * assert false : msg;
131 */
132 public static void error(String msg) {
133 throw new AssertionError(msg);
134 }
135
136 /** Prevent instantiation. */
137 private Assert() { }
138 }

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