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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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+
+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.
+ */
+ public abstract 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.
+ */
+ public abstract boolean avoidingGui();
+
+ /**
+ * Tells the Bean not to use GUI methods.
+ * If needsGUI() is false, then after this method is called,
+ * avoidingGui() should return true.
+ */
+ public abstract 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.
+ */
+ public abstract void okToUseGui();
+}