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Visibility.java
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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();
}