Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
Casting |
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| 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 | } |