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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. * * * * * * * * * * * * * * * * * * * * */ 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. *

* 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(); }

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