68 lines
2.3 KiB
Java
68 lines
2.3 KiB
Java
/*
|
|
* Copyright (c) 1996, 1998, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation. Oracle designates this
|
|
* particular file as subject to the "Classpath" exception as provided
|
|
* by Oracle in the LICENSE file that accompanied this code.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
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();
|
|
|
|
}
|