| /* |
| * Copyright (c) 1996, 2016, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.beans; |
| |
| import java.awt.Image; |
| import java.awt.Toolkit; |
| import java.awt.image.ImageProducer; |
| import java.net.URL; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| |
| /** |
| * 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. |
| * |
| * @since 1.1 |
| */ |
| 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. |
| */ |
| @Override |
| public BeanDescriptor getBeanDescriptor() { |
| return null; |
| } |
| |
| /** |
| * Deny knowledge of properties. You can override this |
| * if you wish to provide explicit property info. |
| */ |
| @Override |
| 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. |
| */ |
| @Override |
| public int getDefaultPropertyIndex() { |
| return -1; |
| } |
| |
| /** |
| * Deny knowledge of event sets. You can override this |
| * if you wish to provide explicit event set info. |
| */ |
| @Override |
| 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. |
| */ |
| @Override |
| public int getDefaultEventIndex() { |
| return -1; |
| } |
| |
| /** |
| * Deny knowledge of methods. You can override this |
| * if you wish to provide explicit method info. |
| */ |
| @Override |
| 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. |
| */ |
| @Override |
| public BeanInfo[] getAdditionalBeanInfo() { |
| return null; |
| } |
| |
| /** |
| * Claim there are no icons available. You can override |
| * this if you want to provide icons for your bean. |
| */ |
| @Override |
| public Image getIcon(final int iconKind) { |
| final BeanDescriptor descriptor = getBeanDescriptor(); |
| if (descriptor != null) { |
| final Class<?> type = descriptor.getBeanClass(); |
| if (type != null && type.getClassLoader() == null |
| && type.getAnnotation(JavaBean.class) != null) { |
| final String name = type.getName(); |
| final int index = name.lastIndexOf('.'); |
| if (name.substring(0, index).equals("javax.swing")) { |
| final String className = type.getSimpleName(); |
| switch (iconKind) { |
| case ICON_COLOR_32x32: |
| return loadImage(className, "Color32.gif"); |
| case ICON_COLOR_16x16: |
| return loadImage(className, "Color16.gif"); |
| case ICON_MONO_32x32: |
| return loadImage(className, "Mono32.gif"); |
| case ICON_MONO_16x16: |
| return loadImage(className, "Mono16.gif"); |
| } |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * This is a utility method to help in loading standard icon images. |
| * |
| * @param resourceName A pathname relative to the directory holding the |
| * class file of the current class |
| * @return an image object. May be null if the load failed. |
| * @see java.beans.SimpleBeanInfo#loadImage(String) |
| */ |
| private Image loadStandardImage(final String resourceName) { |
| return AccessController.doPrivileged( |
| (PrivilegedAction<Image>) () -> loadImage(resourceName)); |
| } |
| |
| /** |
| * This is a utility method to help in loading standard icon images. |
| * |
| * @param resourceName A pathname relative to the directory holding the |
| * class file of the current class |
| * @param suffix A {@code String} containing a file suffix (<i>e.g.</i>, |
| * "Color32.gif" or "Mono32.gif") |
| * @return an image object. May be null if the load failed. |
| * @see java.beans.SimpleBeanInfo#loadImage(String) |
| */ |
| private Image loadImage(final String resourceName, final String suffix) { |
| final String prefix = "/javax/swing/beaninfo/images/"; |
| final Image image = loadStandardImage(prefix + resourceName + suffix); |
| return image == null ? loadStandardImage(prefix + "JComponent" + suffix) |
| : image; |
| } |
| |
| /** |
| * 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. |
| * |
| * @param resourceName A pathname relative to the directory holding the |
| * class file of the current class. For example, "wombat.gif". |
| * @return an image object or null if the resource is not found or the |
| * resource could not be loaded as an Image |
| */ |
| public Image loadImage(final String resourceName) { |
| try { |
| final URL url = getClass().getResource(resourceName); |
| if (url != null) { |
| final ImageProducer ip = (ImageProducer) url.getContent(); |
| if (ip != null) { |
| return Toolkit.getDefaultToolkit().createImage(ip); |
| } |
| } |
| } catch (final Exception ignored) { |
| } |
| return null; |
| } |
| } |