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/* * @(#)SimpleBeanInfo.java 1.28 05/11/17 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ 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; } } }