/*
* Copyright (c) 1996, 2011, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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*/
package java.beans;
import java.lang.ref.
Reference;
/**
* A BeanDescriptor provides global information about a "bean",
* including its Java class, its displayName, etc.
* <p>
* This is one of the kinds of descriptor returned by a BeanInfo object,
* which also returns descriptors for properties, method, and events.
*/
public class
BeanDescriptor extends
FeatureDescriptor {
private
Reference<? extends
Class<?>>
beanClassRef;
private
Reference<? extends
Class<?>>
customizerClassRef;
/**
* Create a BeanDescriptor for a bean that doesn't have a customizer.
*
* @param beanClass The Class object of the Java class that implements
* the bean. For example sun.beans.OurButton.class.
*/
public
BeanDescriptor(
Class<?>
beanClass) {
this(
beanClass, null);
}
/**
* Create a BeanDescriptor for a bean that has a customizer.
*
* @param beanClass The Class object of the Java class that implements
* the bean. For example sun.beans.OurButton.class.
* @param customizerClass The Class object of the Java class that implements
* the bean's Customizer. For example sun.beans.OurButtonCustomizer.class.
*/
public
BeanDescriptor(
Class<?>
beanClass,
Class<?>
customizerClass) {
this.
beanClassRef =
getWeakReference(
beanClass);
this.
customizerClassRef =
getWeakReference(
customizerClass);
String name =
beanClass.
getName();
while (
name.
indexOf('.') >= 0) {
name =
name.
substring(
name.
indexOf('.')+1);
}
setName(
name);
}
/**
* Gets the bean's Class object.
*
* @return The Class object for the bean.
*/
public
Class<?>
getBeanClass() {
return (this.
beanClassRef != null)
? this.
beanClassRef.
get()
: null;
}
/**
* Gets the Class object for the bean's customizer.
*
* @return The Class object for the bean's customizer. This may
* be null if the bean doesn't have a customizer.
*/
public
Class<?>
getCustomizerClass() {
return (this.
customizerClassRef != null)
? this.
customizerClassRef.
get()
: null;
}
/*
* Package-private dup constructor
* This must isolate the new object from any changes to the old object.
*/
BeanDescriptor(
BeanDescriptor old) {
super(
old);
beanClassRef =
old.
beanClassRef;
customizerClassRef =
old.
customizerClassRef;
}
void
appendTo(
StringBuilder sb) {
appendTo(
sb, "beanClass", this.
beanClassRef);
appendTo(
sb, "customizerClass", this.
customizerClassRef);
}
}