ProxyHandlerProxy and SerializerRegistry treat incorrectly an array of
XmlSerializable
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Key: MUSE-266
URL: https://issues.apache.org/jira/browse/MUSE-266
Project: Muse
Issue Type: Bug
Components: Core Engine - Routing and Serialization
Affects Versions: 2.2.0
Environment: Java 5.0
Reporter: Bogdan Solomon
Assignee: Dan Jemiolo
I have an array of custom defined objects that implement the XmlSerializable
interface. These objects are then sent via a proxy generated by TPTP from a
client (who is also a Muse resource) to another resource. The invocation
however results in an exception due to the non existence of a serializer for my
custom type. I would have expected to have it serialized via the
XmlSerializable interface.
The bug results from the way the SerializerRegistry tries to find the
Serializer for a class. Looking at the code it looks for the class and it's
parents + interfaces. However doing a small test showed me that Java returns
for an array of my objects the following interfaces, and no parents:
class com.ibm.autonomic.util.Test
interface java.lang.Cloneable
interface java.io.Serializable
doing the same test for an object of my type results in the following:
interface org.apache.muse.util.xml.XmlSerializable
interface com.ibm.autonomic.util.EstimatedDataNamespace
So it will be impossible for the current implementation of the
SerializerRegistry to find how to serialize any array type that should be
serialized via a parent's or interface's serializer. The solution in my opinion
would be to check if it is an array class, check if the type of that array is
serializable and then return the ArraySerializer. This would also remove the
necessity of adding a serializer for the array type and for the basic type.
In SerializerRegistry line 120 after
if (type == null)
throw new NullPointerException(_MESSAGES.get("NullClass"));
add
if (type.isArray())
{
//figure out if we have a serializer for the base type
Serializer ser = searchClassHierarchy(type.getComponentType());
if (ser != null)
{
//the base type has a serializer, so generate an array
serializer for the type and return it
//the type will be our array type and ser is the serializer
for the base type
Serializer serArray = new ArraySerializer(type, ser);
return serArray;
}
}
This would also result in the removal of lines 168, 169, 172 from the
registrySerializer() method as they will no longer be necessary and they work
only if the base array type has a serializer. I'll attach a fixed
SerializerRegistry
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