org.springframework.beans
Class CachedIntrospectionResults

java.lang.Object
  org.springframework.beans.CachedIntrospectionResults

final class CachedIntrospectionResults

extends Object

Class to cache PropertyDescriptor information for a Java class. Package-visible; not for use by application code.

Necessary as Introspector.getBeanInfo() in JDK 1.3 will return a new deep copy of the BeanInfo every time we ask for it. We take the opportunity to hash property descriptors by method name for fast lookup. Furthermore, we do our own caching of descriptors here, rather than rely on the JDK's system-wide BeanInfo cache (to avoid leaks on class loader shutdown).

Information is cached statically, so we don't need to create new objects of this class for every JavaBean we manipulate. Thus this class implements the factory design pattern, using a private constructor and a static forClass method to obtain instances.

Since:

05 May 2001

Author:

Rod Johnson, Juergen Hoeller

Method Summary

(package private) static CachedIntrospectionResults	forClass(Class clazz) We might use this from the EJB tier, so we don't want to use synchronization.
(package private) Class	getBeanClass()
(package private) BeanInfo	getBeanInfo()
(package private) PropertyDescriptor	getPropertyDescriptor(String propertyName)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

forClass

static CachedIntrospectionResults forClass(Class clazz)
                                    throws BeansException

We might use this from the EJB tier, so we don't want to use synchronization. Object references are atomic, so we can live with doing the occasional unnecessary lookup at startup only.

Throws:

BeansException

getBeanInfo

BeanInfo getBeanInfo()

getBeanClass

Class getBeanClass()

getPropertyDescriptor

PropertyDescriptor getPropertyDescriptor(String propertyName)