Initial revision

From-SVN: r102074

libjava/classpath/java/beans/Visibility.java

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+/* 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. */
+
+
+package java.beans;
+
+/**
+ * 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.
+ * <P>
+ *
+ * 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.
+ *
+ * @author John Keiser
+ * @since JDK1.1
+ * @version 1.1.0, 29 Jul 1998
+ */
+
+public interface Visibility {
+	/**
+	 * Tells whether the Bean can run without a GUI or not.
+	 * @return false if Bean can run without a GUI, else true.
+	 */
+	boolean needsGui();
+
+	/**
+	 * Tells whether Bean is trying not to use the GUI.
+	 * If needsGui() is true, this method should always return false.
+	 * @return true if definitely not using GUI, otherwise false.
+	 */
+	boolean avoidingGui();
+
+	/**
+	 * Tells the Bean not to use GUI methods.
+	 * If needsGUI() is false, then after this method is called,
+	 * avoidingGui() should return true.
+	 */
+	void dontUseGui();
+
+	/**
+	 * Tells the Bean it may use the GUI.
+	 * The Bean is not required to use the GUI in this case, it is
+	 * merely being <EM>permitted</EM> to use it.  If needsGui() is
+	 * false, avoidingGui() may return true or false after this method
+	 * is called.
+	 */
+	void okToUseGui();
+}