Mercurial > projects > dwt2
annotate org.eclipse.equinox.common/src/org/eclipse/core/runtime/Assert.d @ 105:bbe49769ec18
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author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 08 Nov 2009 12:42:30 +0100 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
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3 * All rights reserved. This program and the accompanying materials |
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4 * are made available under the terms of the Eclipse Public License v1.0 |
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5 * which accompanies this distribution, and is available at |
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6 * http://www.eclipse.org/legal/epl-v10.html |
105 | 7 * |
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8 * Contributors: |
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9 * IBM Corporation - initial API and implementation |
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10 *******************************************************************************/ |
105 | 11 // Port to the D programming language: |
12 // Frank Benoit <benoit@tionex.de> | |
13 module org.eclipse.core.runtimeAssert; | |
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14 |
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15 import java.lang.all; |
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16 |
105 | 17 import org.eclipse.core.runtimeAssertionFailedException; // packageimport |
18 | |
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19 /** |
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20 * <code>Assert</code> is useful for for embedding runtime sanity checks |
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21 * in code. The predicate methods all test a condition and throw some |
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22 * type of unchecked exception if the condition does not hold. |
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23 * <p> |
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24 * Assertion failure exceptions, like most runtime exceptions, are |
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25 * thrown when something is misbehaving. Assertion failures are invariably |
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26 * unspecified behavior; consequently, clients should never rely on |
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27 * these being thrown (and certainly should not being catching them |
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28 * specifically). |
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29 * </p><p> |
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30 * This class can be used without OSGi running. |
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31 * </p><p> |
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32 * This class is not intended to be instantiated or sub-classed by clients. |
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33 * </p> |
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34 * @since org.eclipse.equinox.common 3.2 |
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35 * @noextend This class is not intended to be subclassed by clients. |
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36 * @noinstantiate This class is not intended to be instantiated by clients. |
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37 */ |
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38 public final class Assert { |
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39 /* This class is not intended to be instantiated. */ |
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40 private this() { |
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41 // not allowed |
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42 } |
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43 |
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44 /** Asserts that an argument is legal. If the given bool is |
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45 * not <code>true</code>, an <code>IllegalArgumentException</code> |
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46 * is thrown. |
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47 * |
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48 * @param expression the outcode of the check |
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49 * @return <code>true</code> if the check passes (does not return |
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50 * if the check fails) |
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51 * @exception IllegalArgumentException if the legality test failed |
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52 */ |
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53 public static bool isLegal(bool expression) { |
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54 return isLegal(expression, ""); //$NON-NLS-1$ |
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55 } |
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56 |
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57 /** Asserts that an argument is legal. If the given bool is |
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58 * not <code>true</code>, an <code>IllegalArgumentException</code> |
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59 * is thrown. |
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60 * The given message is included in that exception, to aid debugging. |
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61 * |
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62 * @param expression the outcode of the check |
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63 * @param message the message to include in the exception |
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64 * @return <code>true</code> if the check passes (does not return |
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65 * if the check fails) |
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66 * @exception IllegalArgumentException if the legality test failed |
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67 */ |
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68 public static bool isLegal(bool expression, String message) { |
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69 if (!expression) |
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70 throw new IllegalArgumentException(message); |
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71 return expression; |
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72 } |
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73 |
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74 /** Asserts that the given object is not <code>null</code>. If this |
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75 * is not the case, some kind of unchecked exception is thrown. |
105 | 76 * |
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77 * @param object the value to test |
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78 */ |
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79 public static void isNotNull(Object object) { |
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80 isNotNull(object, ""); //$NON-NLS-1$ |
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81 } |
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82 |
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83 /** Asserts that the given object is not <code>null</code>. If this |
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84 * is not the case, some kind of unchecked exception is thrown. |
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85 * The given message is included in that exception, to aid debugging. |
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86 * |
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87 * @param object the value to test |
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88 * @param message the message to include in the exception |
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89 */ |
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90 public static void isNotNull(Object object, String message) { |
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91 if (object is null) |
105 | 92 throw new AssertionFailedException("null argument:" + message); //$NON-NLS-1$ |
86 | 93 } |
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94 |
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95 /** Asserts that the given bool is <code>true</code>. If this |
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96 * is not the case, some kind of unchecked exception is thrown. |
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97 * |
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98 * @param expression the outcode of the check |
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99 * @return <code>true</code> if the check passes (does not return |
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100 * if the check fails) |
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101 */ |
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102 public static bool isTrue(bool expression) { |
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103 return isTrue(expression, ""); //$NON-NLS-1$ |
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104 } |
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105 |
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106 /** Asserts that the given bool is <code>true</code>. If this |
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107 * is not the case, some kind of unchecked exception is thrown. |
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108 * The given message is included in that exception, to aid debugging. |
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109 * |
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110 * @param expression the outcode of the check |
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111 * @param message the message to include in the exception |
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112 * @return <code>true</code> if the check passes (does not return |
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113 * if the check fails) |
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114 */ |
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115 public static bool isTrue(bool expression, String message) { |
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116 if (!expression) |
105 | 117 throw new AssertionFailedException("assertion failed: " + message); //$NON-NLS-1$ |
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118 return expression; |
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119 } |
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120 } |