uk.ac.starlink.vo

Interface ResultHandler<T>

public interface ResultHandler<T>

Interface defining callbacks for receiving asynchronously an generated value. All methods of this interface are to be called on the Event Dispatch Thread.

Since:

20 Apr 2015

Author:

Mark Taylor

Method Summary

Modifier and Type	Method and Description
boolean	isActive() Indicates whether this handler is still permitted to affect the GUI.
void	showError(IOException error) Updates GUI with an error obtained while trying to acquire result.
void	showResult(T result) Updates GUI with the acquired result.
void	showWaiting() Updates GUI to indicate the result is in the process of being acquired.

Method Detail

isActive

boolean isActive()

Indicates whether this handler is still permitted to affect the GUI. If it returns false, the other methods will have no effect. Called on EDT.

Returns:

true iff handler is permitted to affect GUI

showWaiting

void showWaiting()

Updates GUI to indicate the result is in the process of being acquired. Called on EDT. Ignored if not isActive.

showResult

void showResult(T result)

Updates GUI with the acquired result. Called on EDT. Ignored if not isActive.

showError

void showError(IOException error)

Updates GUI with an error obtained while trying to acquire result. Called on EDT. Ignored if not isActive.