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java.beans

Interface Visibility

Known Subinterfaces:
BeanContext, BeanContextServices
Known Implementing Classes:
BeanContextServicesSupport, BeanContextSupport
public interface Visibility
Visibility is an interface a Bean may implement so that the environment can tell the Bean whether there is a GUI or not, and so that the Bean can tell the environment whether it needs one or can run without one.

Sun decided not to use standard Introspection patterns so that these methods did not get included when the Introspector made its sweep on the class.

Since:
JDK1.1

Method Summary

boolean
avoidingGui()
Tells whether Bean is trying not to use the GUI.
void
dontUseGui()
Tells the Bean not to use GUI methods.
boolean
needsGui()
Tells whether the Bean can run without a GUI or not.
void
okToUseGui()
Tells the Bean it may use the GUI.

Method Details

avoidingGui

public boolean avoidingGui()
Tells whether Bean is trying not to use the GUI. If needsGui() is true, this method should always return false.
Returns:
true if definitely not using GUI, otherwise false.

dontUseGui

public void dontUseGui()
Tells the Bean not to use GUI methods. If needsGUI() is false, then after this method is called, avoidingGui() should return true.

needsGui

public boolean needsGui()
Tells whether the Bean can run without a GUI or not.
Returns:
false if Bean can run without a GUI, else true.

okToUseGui

public void okToUseGui()
Tells the Bean it may use the GUI. The Bean is not required to use the GUI in this case, it is merely being permitted to use it. If needsGui() is false, avoidingGui() may return true or false after this method is called.
java.beans.Visibility Copyright (C) 1998, 1999 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath 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 for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

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