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Java Source | 1998-03-20 | 3.4 KB | 117 lines |
- /*
- * @(#)SimpleBeanInfo.java 1.19 98/03/18
- *
- * Copyright 1996, 1997 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
- 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(String resourceName) {
- try {
- java.net.URL url = getClass().getResource(resourceName);
- java.awt.Toolkit tk = java.awt.Toolkit.getDefaultToolkit();
- return tk.createImage((java.awt.image.ImageProducer) url.getContent());
- } catch (Exception ex) {
- return null;
- }
- }
-
- }
-