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68 lines
1.3 KiB
68 lines
1.3 KiB
/*
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* Copyright (c) 1996, 1998, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.beans;
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/**
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* Under some circumstances a bean may be run on servers where a GUI
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* is not available. This interface can be used to query a bean to
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* determine whether it absolutely needs a gui, and to advise the
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* bean whether a GUI is available.
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* <p>
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* This interface is for expert developers, and is not needed
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* for normal simple beans. To avoid confusing end-users we
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* avoid using getXXX setXXX design patterns for these methods.
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*/
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public interface Visibility {
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/**
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* Determines whether this bean needs a GUI.
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*
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* @return True if the bean absolutely needs a GUI available in
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* order to get its work done.
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*/
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boolean needsGui();
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/**
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* This method instructs the bean that it should not use the Gui.
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*/
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void dontUseGui();
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/**
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* This method instructs the bean that it is OK to use the Gui.
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*/
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void okToUseGui();
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/**
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* Determines whether this bean is avoiding using a GUI.
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*
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* @return true if the bean is currently avoiding use of the Gui.
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* e.g. due to a call on dontUseGui().
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*/
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boolean avoidingGui();
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}
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