Mercurial > projects > dwt-linux
diff dwt/SWTError.d @ 9:ad2b69216039
moved org.eclipse.swt to dwt
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Sat, 05 Jan 2008 17:39:49 +0100 |
parents | org/eclipse/swt/SWTError.d@c8ad75f8819e |
children | 63c023465156 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dwt/SWTError.d Sat Jan 05 17:39:49 2008 +0100 @@ -0,0 +1,154 @@ +/******************************************************************************* + * Copyright (c) 2000, 2005 IBM Corporation and others. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Eclipse Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/epl-v10.html + * + * Contributors: + * IBM Corporation - initial API and implementation + *******************************************************************************/ +module org.eclipse.swt.SWTError; + +import org.eclipse.swt.SWT; + +import tango.core.Exception; +import tango.io.Stdout; + +/** + * This error is thrown whenever an unrecoverable error + * occurs internally in SWT. The message text and error code + * provide a further description of the problem. The exception + * has a <code>throwable</code> field which holds the underlying + * throwable that caused the problem (if this information is + * available (i.e. it may be null)). + * <p> + * SWTErrors are thrown when something fails internally which + * either leaves SWT in an unknown state (eg. the o/s call to + * remove an item from a list returns an error code) or when SWT + * is left in a known-to-be-unrecoverable state (eg. it runs out + * of callback resources). SWTErrors should not occur in typical + * programs, although "high reliability" applications should + * still catch them. + * </p><p> + * This class also provides support methods used by SWT to match + * error codes to the appropriate exception class (SWTError, + * SWTException, or IllegalArgumentException) and to provide + * human readable strings for SWT error codes. + * </p> + * + * @see SWTException + * @see SWT#error(int) + */ + +public class SWTError : PlatformException { + /** + * The SWT error code, one of SWT.ERROR_*. + */ + public int code; + + /** + * The underlying throwable that caused the problem, + * or null if this information is not available. + */ + public TracedException throwable; + + //static final long serialVersionUID = 3833467327105808433L; + +/** + * Constructs a new instance of this class with its + * stack trace filled in. The error code is set to an + * unspecified value. + */ +public this () { + this (SWT.ERROR_UNSPECIFIED); +} + +/** + * Constructs a new instance of this class with its + * stack trace and message filled in. The error code is + * set to an unspecified value. Specifying <code>null</code> + * as the message is equivalent to specifying an empty string. + * + * @param message the detail message for the exception + */ +public this (char[] message) { + this (SWT.ERROR_UNSPECIFIED, message); +} + +/** + * Constructs a new instance of this class with its + * stack trace and error code filled in. + * + * @param code the SWT error code + */ +public this (int code) { + this (code, SWT.findErrorText (code)); +} + +/** + * Constructs a new instance of this class with its + * stack trace, error code and message filled in. + * Specifying <code>null</code> as the message is + * equivalent to specifying an empty string. + * + * @param code the SWT error code + * @param message the detail message for the exception + */ +public this (int code, char[] message) { + super (message); + this.code = code; +} + +/** + * Returns the underlying throwable that caused the problem, + * or null if this information is not available. + * <p> + * NOTE: This method overrides Throwable.getCause() that was + * added to JDK1.4. It is necessary to override this method + * in order for inherited printStackTrace() methods to work. + * </p> + * @return the underlying throwable + * + * @since 3.1 + */ +public Exception getCause() { + return throwable; +} + +/** + * Returns the string describing this SWTError object. + * <p> + * It is combined with the message string of the Throwable + * which caused this SWTError (if this information is available). + * </p> + * @return the error message string of this SWTError object + */ +public char[] getMessage () { + if (throwable is null) + return super.toString(); + return super.toString () ~ " (" ~ throwable.toString () ~ ")"; //$NON-NLS-1$ //$NON-NLS-2$ +} + +/** + * Outputs a printable representation of this error's + * stack trace on the standard error stream. + * <p> + * Note: printStackTrace(PrintStream) and printStackTrace(PrintWriter) + * are not provided in order to maintain compatibility with CLDC. + * </p> + */ +public void printStackTrace () { + Stderr.formatln( "stacktrace follows (if feature compiled in)" ); + foreach( msg; this ){ + Stderr.formatln( "{}", msg ); + } + if ( throwable !is null) { + Stderr.formatln ("*** Stack trace of contained error ***"); //$NON-NLS-1$ + foreach( msg; throwable ){ + Stderr.formatln( "{}", msg ); + } + } +} + +}