annotate dwt/DWTException.d @ 318:f7a1b148cb35

Fix the languag file support.
author Frank Benoit <benoit@tionex.de>
date Sun, 19 Oct 2008 02:47:56 +0200
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children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwt.DWTException;
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14
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15 import dwt.DWT;
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16
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17 import tango.core.Exception;
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18 import tango.io.Stdout;
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19 import dwt.dwthelper.utils;
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20
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21 /**
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22 * This runtime exception is thrown whenever a recoverable error
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23 * occurs internally in DWT. The message text and error code
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24 * provide a further description of the problem. The exception
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25 * has a <code>throwable</code> field which holds the underlying
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26 * exception that caused the problem (if this information is
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27 * available (i.e. it may be null)).
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28 * <p>
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29 * SWTExceptions are thrown when something fails internally,
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30 * but DWT is left in a known stable state (eg. a widget call
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31 * was made from a non-u/i thread, or there is failure while
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32 * reading an Image because the source file was corrupt).
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33 * </p>
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34 *
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35 * @see DWTError
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36 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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37 */
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38
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39 public class DWTException : Exception {
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40 /**
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41 * The DWT error code, one of DWT.ERROR_*.
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42 */
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43 public int code;
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44
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45 /**
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46 * The underlying throwable that caused the problem,
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47 * or null if this information is not available.
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48 */
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49 public Exception throwable( Exception e ){
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50 this.next = e;
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51 return this.next;
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52 }
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53 public Exception throwable(){
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54 return this.next;
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55 }
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56
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57
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58 //static final long serialVersionUID = 3257282552304842547L;
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59
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60 /**
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61 * Constructs a new instance of this class with its
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62 * stack trace filled in. The error code is set to an
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63 * unspecified value.
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64 */
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65 public this () {
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66 this (DWT.ERROR_UNSPECIFIED);
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67 }
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68
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69 /**
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70 * Constructs a new instance of this class with its
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71 * stack trace and message filled in. The error code is
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72 * set to an unspecified value. Specifying <code>null</code>
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73 * as the message is equivalent to specifying an empty string.
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74 *
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75 * @param message the detail message for the exception
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76 */
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77 public this (String message) {
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78 this (DWT.ERROR_UNSPECIFIED, message);
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79 }
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80
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81 /**
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82 * Constructs a new instance of this class with its
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83 * stack trace and error code filled in.
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84 *
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85 * @param code the DWT error code
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86 */
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87 public this (int code) {
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88 this (code, DWT.findErrorText (code));
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89 }
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90
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91 /**
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92 * Constructs a new instance of this class with its
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93 * stack trace, error code and message filled in.
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94 * Specifying <code>null</code> as the message is
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95 * equivalent to specifying an empty string.
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96 *
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97 * @param code the DWT error code
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98 * @param message the detail message for the exception
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99 */
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100 public this (int code, String message) {
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101 super (message);
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102 this.code = code;
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103 }
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104
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105 /**
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106 * Returns the underlying throwable that caused the problem,
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107 * or null if this information is not available.
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108 * <p>
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109 * NOTE: This method overrides Throwable.getCause() that was
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110 * added to JDK1.4. It is necessary to override this method
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111 * in order for inherited printStackTrace() methods to work.
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112 * </p>
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113 * @return the underlying throwable
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114 *
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115 * @since 3.1
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116 */
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117 public Exception getCause() {
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118 return throwable;
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119 }
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120
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121 /**
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122 * Returns the string describing this DWTException object.
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123 * <p>
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124 * It is combined with the message string of the Throwable
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125 * which caused this DWTException (if this information is available).
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126 * </p>
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127 * @return the error message string of this DWTException object
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128 */
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129 public String getMessage () {
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130 if (throwable is null) return super.toString ();
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131 return super.toString () ~ " (" ~ throwable.toString () ~ ")"; //$NON-NLS-1$ //$NON-NLS-2$
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132 }
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133
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134 /**
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135 * Outputs a printable representation of this exception's
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136 * stack trace on the standard error stream.
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137 * <p>
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138 * Note: printStackTrace(PrintStream) and printStackTrace(PrintWriter)
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139 * are not provided in order to maintain compatibility with CLDC.
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140 * </p>
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141 */
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142 public void printStackTrace () {
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143 Stderr.formatln( "stacktrace follows (if feature compiled in)" );
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144 foreach( msg; info ){
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145 Stderr.formatln( "{}", msg );
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146 }
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147 if ( throwable !is null) {
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148 Stderr.formatln ("*** Stack trace of contained exception ***"); //$NON-NLS-1$
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149 foreach( msg; throwable.info ){
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150 Stderr.formatln( "{}", msg );
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151 }
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152 }
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153 }
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154
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155 }
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