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Java > Open Source Codes > org > apache > james > util > Assert


1 /***********************************************************************
2  * Copyright (c) 2000-2004 The Apache Software Foundation. *
3  * All rights reserved. *
4  * ------------------------------------------------------------------- *
5  * Licensed under the Apache License, Version 2.0 (the "License"); you *
6  * may not use this file except in compliance with the License. You *
7  * may obtain a copy of the License at: *
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9  * http://www.apache.org/licenses/LICENSE-2.0 *
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14  * implied. See the License for the specific language governing *
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16  ***********************************************************************/
17
18 package org.apache.james.util;
19
20
21
22 /**
23  * A set of debugging utilities.
24  */
25 public final class Assert
26 {
27     public static final boolean ON = true;
28
29     // Can't instantiate.
30 private Assert() {};
31     
32     /**
33      * Checks the supplied boolean expression, throwing an AssertionException if false;
34      */
35     public static void isTrue( boolean expression )
36     {
37         if ( ! expression ) {
38             throw new RuntimeException JavaDoc( "Assertion Failed." );
39         }
40     }
41
42     /**
43      * Fails with an assertion exception.
44      */
45     public static void fail()
46     {
47         throw new RuntimeException JavaDoc( "Assertion error - should not reach here." );
48     }
49
50     /**
51      * Fails, indicating not-yet-implemented features.
52      */
53     public static void notImplemented()
54     {
55         throw new RuntimeException JavaDoc( "Not implemented" );
56     }
57
58 }
59
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