| /* |
| * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.javac.util; |
| |
| import java.util.function.Supplier; |
| |
| /** |
| * Simple facility for unconditional assertions. |
| * The methods in this class are described in terms of equivalent assert |
| * statements, assuming that assertions have been enabled. |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class Assert { |
| /** Equivalent to |
| * assert cond; |
| */ |
| public static void check(boolean cond) { |
| if (!cond) |
| error(); |
| } |
| |
| /** Equivalent to |
| * assert (o == null); |
| */ |
| public static void checkNull(Object o) { |
| if (o != null) |
| error(); |
| } |
| |
| /** Equivalent to |
| * assert (t != null); return t; |
| */ |
| public static <T> T checkNonNull(T t) { |
| if (t == null) |
| error(); |
| return t; |
| } |
| |
| /** Equivalent to |
| * assert cond : value; |
| */ |
| public static void check(boolean cond, int value) { |
| if (!cond) |
| error(String.valueOf(value)); |
| } |
| |
| /** Equivalent to |
| * assert cond : value; |
| */ |
| public static void check(boolean cond, long value) { |
| if (!cond) |
| error(String.valueOf(value)); |
| } |
| |
| /** Equivalent to |
| * assert cond : value; |
| */ |
| public static void check(boolean cond, Object value) { |
| if (!cond) |
| error(String.valueOf(value)); |
| } |
| |
| /** Equivalent to |
| * assert cond : msg; |
| */ |
| public static void check(boolean cond, String msg) { |
| if (!cond) |
| error(msg); |
| } |
| |
| /** Equivalent to |
| * assert cond : msg.get(); |
| * Note: message string is computed lazily. |
| */ |
| public static void check(boolean cond, Supplier<String> msg) { |
| if (!cond) |
| error(msg.get()); |
| } |
| |
| /** Equivalent to |
| * assert (o == null) : value; |
| */ |
| public static void checkNull(Object o, Object value) { |
| if (o != null) |
| error(String.valueOf(value)); |
| } |
| |
| /** Equivalent to |
| * assert (o == null) : msg; |
| */ |
| public static void checkNull(Object o, String msg) { |
| if (o != null) |
| error(msg); |
| } |
| |
| /** Equivalent to |
| * assert (o == null) : msg.get(); |
| * Note: message string is computed lazily. |
| */ |
| public static void checkNull(Object o, Supplier<String> msg) { |
| if (o != null) |
| error(msg.get()); |
| } |
| |
| /** Equivalent to |
| * assert (o != null) : msg; |
| */ |
| public static <T> T checkNonNull(T t, String msg) { |
| if (t == null) |
| error(msg); |
| return t; |
| } |
| |
| /** Equivalent to |
| * assert (o != null) : msg.get(); |
| * Note: message string is computed lazily. |
| */ |
| public static <T> T checkNonNull(T t, Supplier<String> msg) { |
| if (t == null) |
| error(msg.get()); |
| return t; |
| } |
| |
| /** Equivalent to |
| * assert false; |
| */ |
| public static void error() { |
| throw new AssertionError(); |
| } |
| |
| /** Equivalent to |
| * assert false : msg; |
| */ |
| public static void error(String msg) { |
| throw new AssertionError(msg); |
| } |
| |
| /** Prevent instantiation. */ |
| private Assert() { } |
| } |