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Diffstat (limited to 'src/core/lombok/Lombok.java')
-rw-r--r-- | src/core/lombok/Lombok.java | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/core/lombok/Lombok.java b/src/core/lombok/Lombok.java new file mode 100644 index 00000000..71684f4f --- /dev/null +++ b/src/core/lombok/Lombok.java @@ -0,0 +1,60 @@ +/* + * 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; + } +} |