Visibility (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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Java^TM 2 Platform
Standard Ed. 5.0

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java.beans
Interface Visibility

All Known Subinterfaces:: BeanContext, BeanContextServices

All Known Implementing Classes:: BeanContextServicesSupport, BeanContextSupport

public interface Visibility

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.

Method Summary

boolean avoidingGui()
          Determines whether this bean is avoiding using a GUI.

void dontUseGui()
          This method instructs the bean that it should not use the Gui.

boolean needsGui()
          Determines whether this bean needs a GUI.

void okToUseGui()
          This method instructs the bean that it is OK to use the Gui.

Method Summary
`boolean`	`avoidingGui()` Determines whether this bean is avoiding using a GUI.
`void`	`dontUseGui()` This method instructs the bean that it should not use the Gui.
`boolean`	`needsGui()` Determines whether this bean needs a GUI.
`void`	`okToUseGui()` This method instructs the bean that it is OK to use the Gui.

Method Detail

needsGui

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.

dontUseGui

void dontUseGui()

This method instructs the bean that it should not use the Gui.

okToUseGui

void okToUseGui()

This method instructs the bean that it is OK to use the Gui.

avoidingGui

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().