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75 lines
2.5 KiB
Java
75 lines
2.5 KiB
Java
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/* java.beans.Visibility
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Copyright (C) 1998, 1999 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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package java.beans;
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/**
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* Visibility is an interface a Bean may implement so that the environment
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* can tell the Bean whether there is a GUI or not, and so that the Bean
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* can tell the environment whether it needs one or can run without one.
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* <P>
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*
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* Sun decided not to use standard Introspection patterns so that these
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* methods did not get included when the Introspector made its sweep on
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* the class.
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*
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* @author John Keiser
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* @since JDK1.1
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* @version 1.1.0, 29 Jul 1998
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*/
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public interface Visibility {
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/**
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* Tells whether the Bean can run without a GUI or not.
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* @return false if Bean can run without a GUI, else true.
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*/
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public abstract boolean needsGui();
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/**
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* Tells whether Bean is trying not to use the GUI.
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* If needsGui() is true, this method should always return false.
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* @return true if definitely not using GUI, otherwise false.
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*/
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public abstract boolean avoidingGui();
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/**
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* Tells the Bean not to use GUI methods.
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* If needsGUI() is false, then after this method is called,
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* avoidingGui() should return true.
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*/
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public abstract void dontUseGui();
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/**
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* Tells the Bean it may use the GUI.
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* The Bean is not required to use the GUI in this case, it is
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* merely being <EM>permitted</EM> to use it. If needsGui() is
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* false, avoidingGui() may return true or false after this method
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* is called.
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*/
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public abstract void okToUseGui();
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}
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