1 Reply Latest reply on Dec 21, 2011 3:55 AM by BKLEAL

BlazeDS serialization question

FidelGonzo Oct 25, 2010 5:29 AM

I recently came into a situation when sending a nested object from Java to Flex via a HashMap the Objects were null. More precisely:

final Map<Integer, List<String>> tempMap = new HashMap<Integer, List<String>>();

would send the keys as integers but the values were all null.

But when sending the same with String keys:

final Map<String, List<String>> tempMap = new HashMap<String, List<String>>();

the objects came thru.

Are there any restrictions in BlazeDS serialization when using complex types as keys?

1. Re: BlazeDS serialization question

BKLEAL Dec 21, 2011 3:55 AM (in response to FidelGonzo)

Just in case anyone is still looking for an answer to this issue, I just ran into the same problem. During my investigation, I learned that BlazeDS serialization is expecting only String key values for Map objects. Since the Map coming in has Integer keys, the key is changed to a string by the serialization. At that point, the value cannot be obtained and serialized. Change the Integer key to a String and it works. Here is the site that helped me get it working.

http://agricola-online.blogspot.com/2010/01/hibernate-blazeds-java-5-enum-and-flex.html
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