--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/core/commands/common/CommandException.d	Wed Mar 26 00:57:19 2008 +0100
@@ -0,0 +1,68 @@
+/*******************************************************************************
+ * Copyright (c) 2004, 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.core.commands.common.CommandException;
+
+import dwt.dwthelper.utils;
+
+/**
+ * Signals that an exception occured within the command architecture.
+ * <p>
+ * This class is not intended to be extended by clients.
+ * </p>
+ *
+ * @since 3.1
+ */
+public abstract class CommandException : Exception {
+
+    /**
+     * This member variable is required here to allow us to compile against JCL
+     * foundation libraries.  The value may be <code>null</code>.
+     */
+    private Exception cause;
+
+    /**
+     * Creates a new instance of this class with the specified detail message.
+     *
+     * @param message
+     *            the detail message; may be <code>null</code>.
+     */
+    public this(String message) {
+        super(message);
+    }
+
+    /**
+     * Creates a new instance of this class with the specified detail message
+     * and cause.
+     *
+     * @param message
+     *            the detail message; may be <code>null</code>.
+     * @param cause
+     *            the cause; may be <code>null</code>.
+     */
+    public this(String message, Exception cause) {
+        super(message);
+        // don't pass the cause to super, to allow compilation against JCL Foundation
+        this.cause = cause;
+    }
+
+    /**
+     * Returns the cause of this throwable or <code>null</code> if the
+     * cause is nonexistent or unknown.
+     *
+     * @return the cause or <code>null</code>
+     */
+    public Exception getCause() {
+        return cause;
+    }
+
+}