Spring 3 AOP java.lang.ClassCastException: $Proxy43 cannot be cast -

i use spring 3.1 , apo(proxy).

annotation provided used pointcat. in case spring aop proxy method "getmergemappingsandcals" annotated calendarmappingannotation

my advise afterreturning

aspect:

@component @aspect public class mappingfilteraspect{     /**      *      * @param retval      */     @afterreturning(         pointcut="@annotation(...annotation.calendarmappingannotation)",         returning="retval"     )     public void calendarmappingfilter(object retval) {       } } 

annotation:

@retention(retentionpolicy.runtime) @target(elementtype.method) public @interface calendarmappingannotation { } 

usage:

@component public class apoimappingmanagerimpl implements apoimappingmanager, applicationcontextaware, serializable {     ...     @calendarmappingannotation     public mergedmapandcalsbeancollection getmergemappingsandcals(){         ...     } } 

configuration:

<context:component-scan base-package="...aus.aspect" /> <aop:aspectj-autoproxy/> 

stacktrace:

java.lang.classcastexception: $proxy43 cannot cast ...mapping.cals.apoimappingmanagerimpl [jvm ...]   @ ...helpers.savefillrestcalsclienthelper.init(savefillrestcalsclienthelper.java:62) [jvm ...]   @ ...dispatcherimpl.loadplugin(dispatcherimpl.java:426) [jvm ...]   @ ...dispatcher.dispatcherimpl.run(dispatcherimpl.java:181) [jvm ...]   @ ...dispatcherimpl.complete(dispatcherimpl.java:319) [jvm ...]   @ ...dispatcherimpl.process(dispatcherimpl.java:259) [jvm ...]   @ ...runnerimpl.run(runnerimpl.java:88) [jvm ...]   @ ...jvmlauncherslave.main(jvmlauncherslave.java:40) 

the behavior looks correct.

it looks casting instance of bean of type apoimappingmanagerimpl , code throwing runtime exception. reason expected behavior because underlying using spring aop , spring aop creates dynamic proxy you, proxy implements interface apoimappingmanager, internally composes apoimappingmanagerimpl , delegates calls composed class. proxy implements apoimappingmanager , not extend apoimappingmanagerimpl , hence error.

to fix should if required casting interface not implementation.