| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| Casting |
|
| 0.0;0 |
| 1 | /* | |
| 2 | Copyright 2004-2008 Paul R. Holser, Jr. All rights reserved. | |
| 3 | Licensed under the Academic Free License version 3.0 | |
| 4 | */ | |
| 5 | ||
| 6 | package jaggregate.internal; | |
| 7 | ||
| 8 | import static jaggregate.internal.CompilerWarnings.*; | |
| 9 | ||
| 10 | /** | |
| 11 | * Facilities used internally for casting. | |
| 12 | * | |
| 13 | * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a> | |
| 14 | * @version $Id: Casting.java,v 1.2 2008/03/30 03:07:11 pholser Exp $ | |
| 15 | */ | |
| 16 | public class Casting { | |
| 17 | /** | |
| 18 | * Discourages instantiation. | |
| 19 | * | |
| 20 | * @throws UnsupportedOperationException always | |
| 21 | */ | |
| 22 | 1 | protected Casting() { |
| 23 | 1 | throw new UnsupportedOperationException(); |
| 24 | } | |
| 25 | ||
| 26 | /** | |
| 27 | * Performs an unchecked cast of a given object to a given type. | |
| 28 | * <p/> | |
| 29 | * This method helps to eliminate compiler warnings from within Jaggregate code in | |
| 30 | * areas where "unsafe" casts are known to be safe yet cannot be suppressed easily, | |
| 31 | * at all, or without annotating at too broad of a scope or too frequently via | |
| 32 | * {@link SuppressWarnings}. <em>Be careful</em>--don't use this method to try to | |
| 33 | * dodge responsibility for type-safe code. | |
| 34 | * | |
| 35 | * @see Class#cast(Object) | |
| 36 | * @param <T> a restriction on the type of the new reference to the object | |
| 37 | * @param item the object to cast | |
| 38 | * @return a reference to {@code item}, of a different type | |
| 39 | * @throws ClassCastException if the cast fails; that is, {@code item} cannot be | |
| 40 | * referenced by a variable of the chosen or inferred type | |
| 41 | */ | |
| 42 | @SuppressWarnings( UNCHECKED ) | |
| 43 | public static <T> T cast( Object item ) { | |
| 44 | 115407 | return (T) item; |
| 45 | } | |
| 46 | } |