BlazeDS serialization with complex types

Question

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?

Answer 1

1. Turn on property errors in your services.config.xml:

   <channels>
   <channel-definition id="YourChannel" class="mx.messaging.channels.AMFChannel">
   <endpoint url="http://{server.name}:{server.port}/{context.root}/messagebroker/amf" class="flex.messaging.endpoints.AMFEndpoint" />
   <properties>
   <polling-enabled>false</polling-enabled>
   <!-- ========= -->
   <serialization>
   <ignore-property-errors>false</ignore-property-errors>
   <log-property-errors>true</log-property-errors>
   </serialization>
   <!-- ========== -->
   </properties>
   </channel-definition>
   </channels>
   

2. Try to remove final keyword and try it without it. I had problems serializing final fields with blazeds