/* * Copyright © 2009 Reinier Zwitserloot and Roel Spilker. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package lombok; /** * Useful utility methods to manipulate lombok-generated code. */ public class Lombok { /** * Throws any throwable 'sneakily' - you don't need to catch it, nor declare that you throw it onwards. * The exception is still thrown - javac will just stop whining about it. * <p> * Example usage: * <p> * <pre>public void run() { * throw sneakyThrow(new IOException("You don't need to catch me!")); * }</pre> * <p> * NB: The exception is not wrapped, ignored, swallowed, or redefined. The JVM actually does not know or care * about the concept of a 'checked exception'. All this method does is hide the act of throwing a checked exception * from the java compiler. * <p> * Note that this method has a return type of {@code RuntimeException}; it is advised you always call this * method as argument to the {@code throw} statement to avoid compiler errors regarding no return * statement and similar problems. This method won't of course return an actual {@code RuntimeException} - * it never returns, it always throws the provided exception. * * @param t The throwable to throw without requiring you to catch its type. * @return A dummy RuntimeException; this method never returns normally, it <em>always</em> throws an exception! */ public static RuntimeException sneakyThrow(Throwable t) { if (t == null) throw new NullPointerException("t"); Lombok.<RuntimeException>sneakyThrow0(t); return null; } @SuppressWarnings("unchecked") private static <T extends Throwable> void sneakyThrow0(Throwable t) throws T { throw (T)t; } /** * Returns the parameter directly. <br /> * * This method can be used to prevent a static analyzer to determine * the nullness of the passed parameter. * * @param <T> the type of the parameter * @param value the value to return * @return value */ public static <T> T preventNullAnalysis(T value) { return value; } }