True, but if he does not cast his reference to the underlying implementation, the jvm has no way to know that the underlying implementation is serializable does it, hence the error. All the calling method knows is that you passed a Set and Set does not extend Serializable.
---------------------------------------- > Date: Sat, 18 Jul 2009 18:11:17 +0530 > Subject: Re: HashMap.Entry not serializable? > From: [email protected] > To: [email protected] > > Russell, > Set,List,Map do not implement Serializable but their implementations do. > In the case of Entry ,it's implemented in Map implementations like hashmap . > the class which implements Entry there isn't Serializable. > > > regards, > Vineet Semwal > > > > > On Sat, Jul 18, 2009 at 5:22 PM, Russell Simpkins < > [email protected]> wrote: > >> >> hashMap.entrySet returns a Set If you look at the javadocs, Set >> does not extend Serializable: >> public interface Setextends Collection >> All Superinterfaces:Collection, Iterable >> >> >> ---------------------------------------- >>> Date: Sat, 18 Jul 2009 13:06:32 +0300 >>> Subject: HashMap.Entry not serializable? >>> From: [email protected] >>> To: [email protected] >>> >>> Hi! >>> >>> I am a bit onfused.. I have new ListView("id", new >>> LinkedList(hashMap.entrySet())) and Wicket gives: >>> >>> >> org.apache.wicket.util.io.SerializableChecker$WicketNotSerializableException: >>> Unable to serialize class: java.util.HashMap$Entry >>> >>> This does not make sense, I would expect hashmap entries to be fully >>> serializable .. not? Any quick workarounds? >>> >>> ** >>> Martin >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: [email protected] >>> For additional commands, e-mail: [email protected] >>> >> >> _________________________________________________________________ >> Windows Live™ Hotmail®: Celebrate the moment with your favorite sports >> pics. Check it out. >> >> http://www.windowslive.com/Online/Hotmail/Campaign/QuickAdd?ocid=TXT_TAGLM_WL_QA_HM_sports_photos_072009&cat=sports >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> >> _________________________________________________________________ Windows Live™ Hotmail®: Celebrate the moment with your favorite sports pics. Check it out. http://www.windowslive.com/Online/Hotmail/Campaign/QuickAdd?ocid=TXT_TAGLM_WL_QA_HM_sports_photos_072009&cat=sports --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
