com.vaadin.terminal
Class SystemError

java.lang.Object
  java.lang.Throwable
      java.lang.Exception
          java.lang.RuntimeException
              com.vaadin.terminal.SystemError

All Implemented Interfaces:

ErrorMessage, Paintable, Serializable, EventListener

public class SystemError
extends RuntimeException
implements ErrorMessage

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. SystemError does not support HTML in error messages or stack traces. If HTML messages are required, use UserError or a custom implementation of ErrorMessage.

Since:

3.0

Version:

6.8.18

Author:

Vaadin Ltd.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.vaadin.terminal.Paintable

Paintable.RepaintRequestEvent, Paintable.RepaintRequestListener

Field Summary

Fields inherited from interface com.vaadin.terminal.ErrorMessage

CRITICAL, ERROR, INFORMATION, SYSTEMERROR, WARNING

Constructor Summary

SystemError(String message)
Constructor for SystemError with error message specified.

SystemError(String message, Throwable cause)
Constructor for SystemError with causing exception and error message.

SystemError(Throwable cause)
Constructor for SystemError with cause.

Method Summary

void	addListener(Paintable.RepaintRequestListener listener) Error messages are inmodifiable and thus listeners are not needed.
Throwable	getCause() Gets cause for the error.
String	getDebugId() Get's currently set debug identifier
int	getErrorLevel() Gets the errors level.
protected String	getHtmlMessage() Returns the message of the error in HTML.
void	paint(PaintTarget target) Paints the Paintable into a UIDL stream.
void	removeListener(Paintable.RepaintRequestListener listener) Error messages are inmodifiable and thus listeners are not needed.
void	requestRepaint() Error messages are inmodifiable and thus listeners are not needed.
void	requestRepaintRequests() Request sending of repaint events on any further visible changes.
void	setDebugId(String id) Adds an unique id for component that get's transferred to terminal for testing purposes.

Methods inherited from class java.lang.Throwable

fillInStackTrace, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

SystemError

public SystemError(String message)

Constructor for SystemError with error message specified.

Parameters:

message - the Textual error description.

SystemError

public SystemError(String message,
                   Throwable cause)

Constructor for SystemError with causing exception and error message.

Parameters:

message - the Textual error description.

cause - the throwable causing the system error.

SystemError

public SystemError(Throwable cause)

Constructor for SystemError with cause.

Parameters:

cause - the throwable causing the system error.

Method Detail

getErrorLevel

public final int getErrorLevel()

Description copied from interface: ErrorMessage

Gets the errors level.

Specified by:

getErrorLevel in interface ErrorMessage

Returns:

the level of error as an integer.

See Also:

ErrorMessage.getErrorLevel()

paint

public void paint(PaintTarget target)
           throws PaintException

Description copied from interface: Paintable

Paints the Paintable into a UIDL stream. This method creates the UIDL sequence describing it and outputs it to the given UIDL stream.

It is called when the contents of the component should be painted in response to the component first being shown or having been altered so that its visual representation is changed.

Specified by:

paint in interface Paintable

Parameters:

target - the target UIDL stream where the component should paint itself to.

Throws:

PaintException - if the paint operation failed.

See Also:

Paintable.paint(com.vaadin.terminal.PaintTarget)

getHtmlMessage

protected String getHtmlMessage()

Returns the message of the error in HTML. Note that this API may change in future versions.

getCause

public Throwable getCause()

Gets cause for the error.

Overrides:

getCause in class Throwable

Returns:

the cause.

See Also:

Throwable.getCause()

addListener

public void addListener(Paintable.RepaintRequestListener listener)

Description copied from interface: ErrorMessage

Error messages are inmodifiable and thus listeners are not needed. This method should be implemented as empty.

Specified by:

addListener in interface ErrorMessage

Specified by:

addListener in interface Paintable

Parameters:

listener - the listener to be added.

See Also:

Paintable.addListener(Paintable.RepaintRequestListener)

removeListener

public void removeListener(Paintable.RepaintRequestListener listener)

Description copied from interface: ErrorMessage

Error messages are inmodifiable and thus listeners are not needed. This method should be implemented as empty.

Specified by:

removeListener in interface ErrorMessage

Specified by:

removeListener in interface Paintable

Parameters:

listener - the listener to be removed.

See Also:

Paintable.removeListener(Paintable.RepaintRequestListener)

requestRepaint

public void requestRepaint()

Description copied from interface: ErrorMessage

Error messages are inmodifiable and thus listeners are not needed. This method should be implemented as empty.

Specified by:

requestRepaint in interface ErrorMessage

Specified by:

requestRepaint in interface Paintable

See Also:

Paintable.requestRepaint()

requestRepaintRequests

public void requestRepaintRequests()

Description copied from interface: Paintable

Request sending of repaint events on any further visible changes. Normally the paintable only send up to one repaint request for listeners after paint as the paintable as the paintable assumes that the listeners already know about the repaint need. This method resets the assumtion. Paint implicitly does the assumtion reset functionality implemented by this method.

This method is normally used only by the terminals to note paintables about implicit repaints (painting the component without actually invoking paint method).

Specified by:

requestRepaintRequests in interface Paintable

getDebugId

public String getDebugId()

Description copied from interface: Paintable

Get's currently set debug identifier

Specified by:

getDebugId in interface Paintable

Returns:

current debug id, null if not set

setDebugId

public void setDebugId(String id)

Description copied from interface: Paintable

Adds an unique id for component that get's transferred to terminal for testing purposes. Keeping identifiers unique throughout the Application instance is on programmers responsibility.

Note, that with the current terminal implementation the identifier cannot be changed while the component is visible. This means that the identifier should be set before the component is painted for the first time and kept the same while visible in the client.

Specified by:

setDebugId in interface Paintable

Parameters:

id - A short (< 20 chars) alphanumeric id