I'm having this exception with GWT 1.7:
Caused by: com.google.gwt.user.client.rpc.SerializationException: Type
'java.util.ArrayList' was not included in the set of types which can
be serialized by this SerializationPolicy or its Class object could
not be loaded. For security purposes, this type will not be
serialized.
at
com.google.gwt.user.server.rpc.impl.StandardSerializationPolicy.validateSerialize
(StandardSerializationPolicy.java:83)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
(ServerSerializationStreamWriter.java:591)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
(AbstractSerializationStreamWriter.java:129)
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
$ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
(ServerSerializationStreamWriter.java:530)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeClass
(ServerSerializationStreamWriter.java:636)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl
(ServerSerializationStreamWriter.java:666)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize
(ServerSerializationStreamWriter.java:593)
at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject
(AbstractSerializationStreamWriter.java:129)
at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter
$ValueWriter$8.write(ServerSerializationStreamWriter.java:146)
at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue
(ServerSerializationStreamWriter.java:530)
at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:573)
at com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess
(RPC.java:441)
at
org.gwtwidgets.server.spring.GWTRPCServiceExporter.invokeMethodOnService
(GWTRPCServiceExporter.java:158)
at org.gwtwidgets.server.spring.GWTRPCServiceExporter.processCall
(GWTRPCServiceExporter.java:316)
... 21 more
which is very strange, because it only happens on an specific project
(composed of many Eclipse-based projects). If I create a new project,
it works ok (serializing java.util.ArrayList).
I tried with and without generics, using the interface java.util.List
in the service interface, using different implementations
(java.util.LinkedList, java.util.ArrayList) and it doesn't work. Even
more surprising, serialization of HashSet and HashMap works ok.
Could somebody help me?
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