private volatile Object beanClass;
这个变量用来保存bean对应的类，该变量可能为String类型，也可能为Class<?>类型。
操作它的几个主要方法：文章来源地址https://www.toymoban.com/news/detail-538942.html
@Override
public void setBeanClassName(@Nullable String beanClassName) {
this.beanClass = beanClassName;
}
@Override
@Nullable
public String getBeanClassName() {
Object beanClassObject = this.beanClass;
if (beanClassObject instanceof Class) {
return ((Class<?>) beanClassObject).getName();
}
else {
return (String) beanClassObject;
}
}
/**
* Specify the class for this bean.
*/
public void setBeanClass(@Nullable Class<?> beanClass) {
this.beanClass = beanClass;
}
/**
* Return the class of the wrapped bean (assuming it is resolved already).
* @return the bean class (never {@code null})
* @throws IllegalStateException if the bean definition does not define a bean class,
* or a specified bean class name has not been resolved into an actual Class yet
* @see #hasBeanClass()
* @see #setBeanClass(Class)
* @see #resolveBeanClass(ClassLoader)
*/
public Class<?> getBeanClass() throws IllegalStateException {
Object beanClassObject = this.beanClass;
if (beanClassObject == null) {
throw new IllegalStateException("No bean class specified on bean definition");
}
if (!(beanClassObject instanceof Class)) {
throw new IllegalStateException(
"Bean class name [" + beanClassObject + "] has not been resolved into an actual Class");
}
return (Class<?>) beanClassObject;
}
文章来源：https://www.toymoban.com/news/detail-538942.html
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