Known Indirect Subclasses
BeanContext |
The BeanContext acts a logical hierarchical container for JavaBeans. |
BeanContextServices |
The BeanContextServices interface provides a mechanism for a BeanContext
to expose generic "services" to the BeanContextChild objects within. |
BeanContextServicesSupport |
This helper class provides a utility implementation of the
java.beans.beancontext.BeanContextServices interface. |
BeanContextSupport |
This helper class provides a utility implementation of the
java.beans.beancontext.BeanContext interface. |
|
Class Overview
Under some circumstances a bean may be run on servers where a GUI
is not available. This interface can be used to query a bean to
determine whether it absolutely needs a gui, and to advise the
bean whether a GUI is available.
This interface is for expert developers, and is not needed
for normal simple beans. To avoid confusing end-users we
avoid using getXXX setXXX design patterns for these methods.
Summary
Public Methods |
abstract
boolean
|
avoidingGui()
Determines whether this bean is avoiding using a GUI.
|
abstract
void
|
dontUseGui()
This method instructs the bean that it should not use the Gui.
|
abstract
boolean
|
needsGui()
Determines whether this bean needs a GUI.
|
abstract
void
|
okToUseGui()
This method instructs the bean that it is OK to use the Gui.
|
Public Methods
public
abstract
boolean
avoidingGui
()
Determines whether this bean is avoiding using a GUI.
Returns
- true if the bean is currently avoiding use of the Gui.
e.g. due to a call on dontUseGui().
public
abstract
void
dontUseGui
()
This method instructs the bean that it should not use the Gui.
public
abstract
boolean
needsGui
()
Determines whether this bean needs a GUI.
Returns
- True if the bean absolutely needs a GUI available in
order to get its work done.
public
abstract
void
okToUseGui
()
This method instructs the bean that it is OK to use the Gui.