SystemError is a runtime exception caused by error in system.
* The system error can be shown to the user as it implements
* ErrorMessage interface, but contains technical information such
* as stack trace and exception.
*
* @author IT Mill Ltd.
* @version
* @VERSION@
* @since 3.0
*/
@SuppressWarnings("serial")
public class SystemError extends RuntimeException implements ErrorMessage {
/**
* The cause of the system error. The cause is stored separately as JDK 1.3
* does not support causes natively.
*/
private Throwable cause = null;
/**
* Constructor for SystemError with error message specified.
*
* @param message
* the Textual error description.
*/
public SystemError(String message) {
super(message);
}
/**
* Constructor for SystemError with causing exception and error message.
*
* @param message
* the Textual error description.
* @param cause
* the throwable causing the system error.
*/
public SystemError(String message, Throwable cause) {
super(message);
this.cause = cause;
}
/**
* Constructor for SystemError with cause.
*
* @param cause
* the throwable causing the system error.
*/
public SystemError(Throwable cause) {
this.cause = cause;
}
/**
* @see com.vaadin.terminal.ErrorMessage#getErrorLevel()
*/
public final int getErrorLevel() {
return ErrorMessage.SYSTEMERROR;
}
/**
* @see com.vaadin.terminal.Paintable#paint(com.vaadin.terminal.PaintTarget)
*/
public void paint(PaintTarget target) throws PaintException {
target.startTag("error");
target.addAttribute("level", "system");
// Paint the error message
final String message = getLocalizedMessage();
if (message != null) {
target.addSection("h2", message);
}
// Paint the exception
if (cause != null) {
target.addSection("h3", "Exception");
final StringWriter buffer = new StringWriter();
cause.printStackTrace(new PrintWriter(buffer));
target.addSection("pre", buffer.toString());
}
target.endTag("error");
}
/**
* Gets cause for the error.
*
* @return the cause.
* @see java.lang.Throwable#getCause()
*/
@Override
public Throwable getCause() {
return cause;
}
/* Documented in super interface */
public void addListener(RepaintRequestListener listener) {
}
/* Documented in super interface */
public void removeListener(RepaintRequestListener listener) {
}
/* Documented in super interface */
public void requestRepaint() {
}
/* Documented in super interface */
public void requestRepaintRequests() {
}
public String getDebugId() {
return null;
}
public void setDebugId(String id) {
throw new UnsupportedOperationException(
"Setting testing id for this Paintable is not implemented");
}
}
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