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/*

* Copyright (c) 1996, 1998, Oracle and/or its affiliates. All rights reserved.

* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

*

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package java.beans;

/**

* 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.

* <p>

* 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.

*/

public interface Visibility {

/**

* Determines whether this bean needs a GUI.

*

* @return True if the bean absolutely needs a GUI available in

* order to get its work done.

*/

boolean needsGui();

/**

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

*/

void dontUseGui();

/**

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

*/

void okToUseGui();

/**

* Determines whether this bean is avoiding using a GUI.

*

* @return true if the bean is currently avoiding use of the Gui.

* e.g. due to a call on dontUseGui().

*/

boolean avoidingGui();

}