| /* |
| * Copyright (c) 2007, 2009, 2011, 2012, 2015 Eike Stepper (Berlin, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.net4j.util; |
| |
| /** |
| * Provides static methods that check object states and invocation arguments. |
| * |
| * @author Eike Stepper |
| * @apiviz.exclude |
| */ |
| public final class CheckUtil |
| { |
| private CheckUtil() |
| { |
| } |
| |
| public static void checkNull(Object handle, String msg) throws NullPointerException |
| { |
| if (handle == null) |
| { |
| throw new NullPointerException(msg); |
| } |
| } |
| |
| public static void checkArg(boolean expr, String msg) throws IllegalArgumentException |
| { |
| if (!expr) |
| { |
| throw new IllegalArgumentException(msg); |
| } |
| } |
| |
| public static void checkArg(Object handle, String handleName) throws IllegalArgumentException |
| { |
| if (handle == null) |
| { |
| throw new IllegalArgumentException(handleName + " is null"); //$NON-NLS-1$ |
| } |
| } |
| |
| public static void checkState(boolean expr, String msg) throws IllegalStateException |
| { |
| if (!expr) |
| { |
| throw new IllegalStateException(msg); |
| } |
| } |
| |
| public static void checkState(Object handle, String handleName) throws IllegalStateException |
| { |
| if (handle == null) |
| { |
| throw new IllegalStateException(handleName + " is null"); //$NON-NLS-1$ |
| } |
| } |
| } |