I have created a testcase for the marshalling of xsd:base64 in two cases- when byte[] can be passed to the marshalling layer (Regular case) or a Byte[] array is sent(DII case where primitives are prohibited).

This case handles the two cases:

testMarshallBase64TypeForDII [Very important]
and
testMarshallBase64Type [I am not sure on this one though, Thomas on Wednesday can validate this case]

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Exp: <ns1:arrayOfbyte xmlns:ns1='http://org.jboss.ws/types' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'><value>Ynl0ZUFycmF5</value></ns1:arrayOfbyte>
Was: <ns1:arrayOfbyte xmlns:ns1='http://org.jboss.ws/types' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'><value>OTg=</value><value>MTIx</value><value>MTE2</value><value>MTAx</value><value>NjU=</value><value>MTE0</value><value>MTE0</value><value>OTc=</value><value>MTIx</value></ns1:arrayOfbyte>

Exp: <ns1:arrayOfbyte xmlns:ns1='http://org.jboss.ws/types' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'><value>Ynl0ZUFycmF5</value></ns1:arrayOfbyte>
Was: <ns1:arrayOfbyte xmlns:ns1='http://org.jboss.ws/types' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'><value>OTg=</value><value>MTIx</value><value>MTE2</value><value>MTAx</value><value>NjU=</value><value>MTE0</value><value>MTE0</value><value>OTc=</value><value>MTIx</value></ns1:arrayOfbyte>
=========================================================================================================================

Suggestions:

I had looked at the binding code. The code relevant is SimpleTypeBindings. It expects a byte[] array in case of xsd:base64. But if it passed a Byte[], the individual Byte objects are passed on the stack. So at the time of marshalling, a Byte is returned where as the marshalling layer expects byte[].

So I suggest check if Byte[] array is passed early on and push the whole Byte[] onto the stack and not individual elements as you do for BigDecimal, BigInteger etc. So when the time comes to marshall, check

if(value instanceof Byte[])

{ /**handle the DII case where Byte[] array is sent as primitives are prohibited */}

else
if( value instanceof byte[])

{ /**handle regular case*/}

As I mentioned, please take a look at how the value (Byte[]) get pushed onto the stack, so that stack.peek returns Byte[] and not individual Byte elements.

I will ask Thomas on Wednesday to validate this JIRA issue, but can you please put in a temporary fix for this JIRA issue?