| /* |
| * Copyright (c) 2011, 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation |
| // |
| package org.eclipse.persistence.jpa.jpql; |
| |
| /** |
| * An utility class that provides various checks and when the condition fails, then an {@link |
| * AssertException} is thrown. |
| * |
| * @version 2.4 |
| * @since 2.4 |
| * @author Pascal Filion |
| */ |
| public final class Assert { |
| |
| /** |
| * Prevents instantiation. |
| */ |
| private Assert() { |
| super(); |
| } |
| |
| /** |
| * Throws an {@link AssertException} immediately. |
| * |
| * @param message The message to display |
| */ |
| public static void fail(String message) { |
| throw new AssertException(message); |
| } |
| |
| /** |
| * Determines whether the given two objects are equal (identity). If the two objects are not |
| * identical, then an {@link AssertException} is thrown |
| * |
| * @param object1 The first object used to be compared to the second object |
| * @param object2 The second object used to be compared to the first object |
| * @param message The expression's message that will describe the reason why the check failed |
| */ |
| public static void isEqual(Object object1, Object object2, String message) { |
| if (object1 != object2) { |
| fail(message); |
| } |
| } |
| |
| /** |
| * Determines whether the given condition if <code>false</code> or <code>true</code> and if it is |
| * <code>true</code> then an {@link AssertException} is thrown. |
| * |
| * @param condition The condition to verify it is <code>false</code> |
| * @param message The expression's message that will describe the reason why the check failed |
| */ |
| public static void isFalse(boolean condition, String message) { |
| if (condition) { |
| fail(message); |
| } |
| } |
| |
| /** |
| * Determines whether the given object is not <code>null</code>. If the object is <code>null</code>, |
| * then an {@link NullPointerException} is thrown |
| * |
| * @param object The value to check to not be <code>null</code> |
| * @param message The expression's message that will describe the reason why the check failed |
| */ |
| public static void isNotNull(Object object, String message) { |
| if (object == null) { |
| throw new NullPointerException(message); |
| } |
| } |
| |
| /** |
| * Determines whether the given object is <code>null</code>. If the object is not <code>null</code>, |
| * then an {@link AssertException} is thrown |
| * |
| * @param object The value to check to be <code>null</code> |
| * @param message The expression's message that will describe the reason why the check failed |
| */ |
| public static void isNull(Object object, String message) { |
| if (object != null) { |
| fail(message); |
| } |
| } |
| |
| /** |
| * Determines whether the given condition if <code>true</code> or <code>false</code> and if it is |
| * <code>false</code> then an {@link AssertException} is thrown. |
| * |
| * @param condition The condition to verify it is <code>true</code> |
| * @param message The expression's message that will describe the reason why the check failed |
| */ |
| public static void isTrue(boolean condition, String message) { |
| if (!condition) { |
| fail(message); |
| } |
| } |
| |
| /** |
| * Determines whether the given object is one of the given choices using identity check. |
| * |
| * @param object The object to find in the list of choices |
| * @param message The expression's message that will describe the reason why the check failed |
| * @param choices The list of valid choices |
| */ |
| public static void isValid(Object object, String message, Object... choices) { |
| for (Object choice : choices) { |
| if (object == choice) { |
| return; |
| } |
| } |
| fail(message); |
| } |
| |
| /** |
| * The exception thrown when the condition is not met. |
| */ |
| public static class AssertException extends RuntimeException { |
| |
| private static final long serialVersionUID = 0L; |
| |
| /** |
| * Creates a new <code>AssertException</code>. |
| * |
| * @param message The message describing the reason why this exception is thrown |
| */ |
| public AssertException(String message) { |
| super(message); |
| } |
| } |
| } |