/*

 * Copyright 1996-1998 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package java.beans;

/**

 * This is a support class to make it easier for people to provide

 * BeanInfo classes.

 * <p>

 * It defaults to providing "noop" information, and can be selectively

 * overriden to provide more explicit information on chosen topics.

 * When the introspector sees the "noop" values, it will apply low

 * level introspection and design patterns to automatically analyze

 * the target bean.

 */

public class SimpleBeanInfo implements BeanInfo {

    /**

     * Deny knowledge about the class and customizer of the bean.

     * You can override this if you wish to provide explicit info.

     */

    public BeanDescriptor getBeanDescriptor() {

        return null;

    }

    /**

     * Deny knowledge of properties. You can override this

     * if you wish to provide explicit property info.

     */

    public PropertyDescriptor[] getPropertyDescriptors() {

        return null;

    }

    /**

     * Deny knowledge of a default property. You can override this

     * if you wish to define a default property for the bean.

     */

    public int getDefaultPropertyIndex() {

        return -1;

    }

    /**

     * Deny knowledge of event sets. You can override this

     * if you wish to provide explicit event set info.

     */

    public EventSetDescriptor[] getEventSetDescriptors() {

        return null;

    }

    /**

     * Deny knowledge of a default event. You can override this

     * if you wish to define a default event for the bean.

     */

    public int getDefaultEventIndex() {

        return -1;

    }

    /**

     * Deny knowledge of methods. You can override this

     * if you wish to provide explicit method info.

     */

    public MethodDescriptor[] getMethodDescriptors() {

        return null;

    }

    /**

     * Claim there are no other relevant BeanInfo objects.  You

     * may override this if you want to (for example) return a

     * BeanInfo for a base class.

     */

    public BeanInfo[] getAdditionalBeanInfo() {

        return null;

    }

    /**

     * Claim there are no icons available.  You can override

     * this if you want to provide icons for your bean.

     */

    public java.awt.Image getIcon(int iconKind) {

        return null;

    }

    /**

     * This is a utility method to help in loading icon images.

     * It takes the name of a resource file associated with the

     * current object's class file and loads an image object

     * from that file.  Typically images will be GIFs.

     * <p>

     * @param resourceName  A pathname relative to the directory

     *          holding the class file of the current class.  For example,

     *          "wombat.gif".

     * @return  an image object.  May be null if the load failed.

     */

    public java.awt.Image loadImage(final String resourceName) {

        try {

            final Class c = getClass();

            java.awt.image.ImageProducer ip = (java.awt.image.ImageProducer)

                java.security.AccessController.doPrivileged(

                new java.security.PrivilegedAction() {

                    public Object run() {

                        java.net.URL url;

                        if ((url = c.getResource(resourceName)) == null) {

                            return null;

                        } else {

                            try {

                                return url.getContent();

                            } catch (java.io.IOException ioe) {

                                return null;

                            }

                        }

                    }

            });

            if (ip == null)

                return null;

            java.awt.Toolkit tk = java.awt.Toolkit.getDefaultToolkit();

            return tk.createImage(ip);

        } catch (Exception ex) {

            return null;

        }

    }

}