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* 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.
*
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*/
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.
*
* 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.
*/
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 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 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 msg) {
if (o != null)
error(msg.get());
}
/** Equivalent to
* assert (o != null) : msg;
*/
public static 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 checkNonNull(T t, Supplier msg) {
if (t == null)
error(msg.get());
return t;
}
/** Equivalent to
* assert false;
*/
public static Error error() {
throw new AssertionError();
}
/** Equivalent to
* assert false : msg;
*/
public static Error error(String msg) {
throw new AssertionError(msg);
}
/** Prevent instantiation. */
private Assert() { }
}