1 /*
   2  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package javax.swing;
  27 
  28 import java.beans.*;
  29 import java.lang.reflect.*;
  30 import java.awt.Image;
  31 
  32 /**
  33  * The superclass for all Swing BeanInfo classes.  It provides
  34  * default implementations of <code>getIcon</code> and
  35  * <code>getDefaultPropertyIndex</code> as well as utility
  36  * methods, like createPropertyDescriptor, for writing BeanInfo
  37  * implementations.  This classes is intended to be used along
  38  * with <code>GenSwingBeanInfo</code> a BeanInfo class code generator.
  39  *
  40  * @see GenSwingBeanInfo
  41  * @author Hans Muller
  42  */
  43 public class SwingBeanInfoBase extends SimpleBeanInfo
  44 {
  45     /**
  46      * The default index is always 0.  In other words the first property
  47      * listed in the getPropertyDescriptors() method is the one
  48      * to show a (JFC builder) user in a situation where just a single
  49      * property will be shown.
  50      */
  51     public int getDefaultPropertyIndex() {
  52         return 0;
  53     }
  54 
  55     /**
  56      * Returns a generic Swing icon, all icon "kinds" are supported.
  57      * Subclasses should defer to this method when they don't have
  58      * a particular beans icon kind.
  59      */
  60     public Image getIcon(int kind) {
  61         // PENDING(hmuller) need generic swing icon images.
  62         return null;
  63     }
  64 
  65     /**
  66      * Returns the BeanInfo for the superclass of our bean, so that
  67      * its PropertyDescriptors will be included.
  68      */
  69     public BeanInfo[] getAdditionalBeanInfo() {
  70         Class superClass = getBeanDescriptor().getBeanClass().getSuperclass();
  71         BeanInfo superBeanInfo = null;
  72         try {
  73             superBeanInfo = Introspector.getBeanInfo(superClass);
  74         } catch (IntrospectionException ie) {}
  75         if (superBeanInfo != null) {
  76             BeanInfo[] ret = new BeanInfo[1];
  77             ret[0] = superBeanInfo;
  78             return ret;
  79         }
  80         return null;
  81     }
  82 }