SimpleBeanInfo.java revision 0
0N/A/*
2362N/A * Copyright 1996-1998 Sun Microsystems, Inc. All Rights Reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation. Sun designates this
0N/A * particular file as subject to the "Classpath" exception as provided
0N/A * by Sun in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
2362N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
2362N/A *
2362N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
0N/A * CA 95054 USA or visit www.sun.com if you need additional information or
0N/A * have any questions.
0N/A */
0N/A
0N/Apackage java.beans;
0N/A
0N/A/**
0N/A * This is a support class to make it easier for people to provide
0N/A * BeanInfo classes.
0N/A * <p>
0N/A * It defaults to providing "noop" information, and can be selectively
0N/A * overriden to provide more explicit information on chosen topics.
0N/A * When the introspector sees the "noop" values, it will apply low
0N/A * level introspection and design patterns to automatically analyze
0N/A * the target bean.
0N/A */
0N/A
0N/Apublic class SimpleBeanInfo implements BeanInfo {
180N/A
0N/A /**
0N/A * Deny knowledge about the class and customizer of the bean.
0N/A * You can override this if you wish to provide explicit info.
0N/A */
0N/A public BeanDescriptor getBeanDescriptor() {
0N/A return null;
0N/A }
0N/A
0N/A /**
0N/A * Deny knowledge of properties. You can override this
0N/A * if you wish to provide explicit property info.
0N/A */
0N/A public PropertyDescriptor[] getPropertyDescriptors() {
0N/A return null;
0N/A }
0N/A
0N/A /**
0N/A * Deny knowledge of a default property. You can override this
0N/A * if you wish to define a default property for the bean.
0N/A */
0N/A public int getDefaultPropertyIndex() {
0N/A return -1;
0N/A }
0N/A
0N/A /**
0N/A * Deny knowledge of event sets. You can override this
0N/A * if you wish to provide explicit event set info.
0N/A */
0N/A public EventSetDescriptor[] getEventSetDescriptors() {
0N/A return null;
0N/A }
0N/A
0N/A /**
0N/A * Deny knowledge of a default event. You can override this
0N/A * if you wish to define a default event for the bean.
0N/A */
0N/A public int getDefaultEventIndex() {
0N/A return -1;
0N/A }
0N/A
0N/A /**
0N/A * Deny knowledge of methods. You can override this
0N/A * if you wish to provide explicit method info.
0N/A */
0N/A public MethodDescriptor[] getMethodDescriptors() {
0N/A return null;
0N/A }
0N/A
0N/A /**
0N/A * Claim there are no other relevant BeanInfo objects. You
0N/A * may override this if you want to (for example) return a
0N/A * BeanInfo for a base class.
0N/A */
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;
}
}
}