org.springframework.aop.framework
Class JdkDynamicAopProxy

java.lang.Object
  org.springframework.aop.framework.JdkDynamicAopProxy

All Implemented Interfaces:

Serializable, InvocationHandler, AopProxy

final class JdkDynamicAopProxy
extends Object
implements AopProxy, InvocationHandler, Serializable

InvocationHandler implementation for the Spring AOP framework, based on JDK 1.3+ dynamic proxies.

Creates a JDK proxy, implementing the interfaces exposed by the proxy. Dynamic proxies cannot be used to proxy methods defined in classes, rather than interfaces.

Objects of this type should be obtained through proxy factories, configured by an AdvisedSupport class. This class is internal to Spring's AOP framework and need not be used directly by client code.

Proxies created using this class will be thread-safe if the underlying (target) class is threadsafe.

Proxies are serializable so long as all Advisors are serializable (including Advices and Pointcuts) and the TargetSource is serializable.

Author:

Rod Johnson, Juergen Hoeller, Rob Harrop

See Also:

Proxy, AdvisedSupport, ProxyFactory

Constructor Summary

JdkDynamicAopProxy(AdvisedSupport config)
Construct a new JDK proxy.

Method Summary

boolean	equals(Object other) Equality means interfaces, advisors and TargetSource are equal.
Object	getProxy() Create a new proxy object.
Object	getProxy(ClassLoader classLoader) Create a new proxy object.
int	hashCode() Proxy uses the hash code of the TargetSource.
Object	invoke(Object proxy, Method method, Object[] args) Implementation of InvocationHandler.invoke.

Methods inherited from class java.lang.Object

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

Constructor Detail

JdkDynamicAopProxy

public JdkDynamicAopProxy(AdvisedSupport config)
                   throws AopConfigException

Construct a new JDK proxy.

Throws:

AopConfigException - if the config is invalid. We try to throw an informative exception in this case, rather than let a mysterious failure happen later.

Method Detail

getProxy

public Object getProxy()

Description copied from interface: AopProxy

Create a new proxy object.

Uses the most optimal default class loader (if necessary for proxy creation): usually, the thread context class loader.

Specified by:

getProxy in interface AopProxy

See Also:

Thread.getContextClassLoader()

getProxy

public Object getProxy(ClassLoader classLoader)

Description copied from interface: AopProxy

Create a new proxy object.

Uses the given class loader (if necessary for proxy creation). null will simply be passed down and thus lead to the low-level proxy facility's default, which is usually different from the default chosen by the AopProxy implementation's getProxy method.

Specified by:

getProxy in interface AopProxy

Parameters:

classLoader - the class loader to create the proxy with (or null for the low-level proxy facility's default)

invoke

public Object invoke(Object proxy,
                     Method method,
                     Object[] args)
              throws Throwable

Implementation of InvocationHandler.invoke.

Callers will see exactly the exception thrown by the target, unless a hook method throws an exception.

Specified by:

invoke in interface InvocationHandler

Throws:

Throwable

hashCode

public int hashCode()

Proxy uses the hash code of the TargetSource.

Overrides:

hashCode in class Object

equals

public boolean equals(Object other)

Equality means interfaces, advisors and TargetSource are equal.

Overrides:

equals in class Object

Parameters:

other - may be a dynamic proxy wrapping an instance of this class

See Also:

Object.equals(java.lang.Object)