xml element capability result improperly changed when passed to the client
(namespace and prefix not preserved)
---------------------------------------------------------------------------------------------------------------
Key: MUSE-155
URL: http://issues.apache.org/jira/browse/MUSE-155
Project: Muse
Issue Type: Bug
Affects Versions: 2.0.0
Environment: Muse 2.0.0, Axis2 1.0, Apache 2.2.3, Tomcat 5.5.17, JDK
1.5.0_08, Windows XP SP2
Reporter: Vinh Nguyen
Assigned To: Dan Jemiolo
Muse is improperly changing the xml result of operations that return custom
types.
For example, my code returns a custom <Box> type in an xml Element. On the
pass back to the client, Muse wraps the Element in a response wrapper. In
doing so, it improperly changes/deletes my element's namespace and prefix.
This causes problems on the client side when I try to extract out my element
and deserialize back to a javabean. The original namespace was moved/deleted
and a default one was inserted, so it becomes difficult to extract the original
element, and my code encounters errors due to mismatched namespaces.
Here's my server code:
public Element boxOperation(int width) throws Exception
{
BoxDocument doc = BoxDocument.Factory.newInstance();
BoxType type = doc.addNewBox();
type.setWidth(BigInteger.valueOf(width));
type.setHeight(BigInteger.valueOf(width));
Element response = XmlUtils.getFirstElement(doc.newDomNode());
System.out.println("--BoxCapability toString(response):\n" +
XmlUtils.toString(response));
return response;
}
Here's the server log output:
--BoxCapability toString(response):
<?xml version="1.0" encoding="UTF-8"?>
<box:Box xmlns:box="http://cisco.com/musebox/schemas/box";>
<box:width>555</box:width>
<box:height>555</box:height>
</box:Box>
On the client side, here's the SOAP trace of the incoming data:
[CLIENT TRACE] SOAP envelope contents (incoming):
...
<soapenv:Body>
<muse-op:BoxOperationResponse
xmlns:muse-op="http://cisco.com/musebox/simple/box";
xmlns:tns="http://ws.apache.org/axis2";>
<Box xmlns="http://schemas.xmlsoap.org/wsdl/";
xmlns:box="http://cisco.com/musebox/schemas/box";>
<box:width>555</box:width>
<box:height>555</box:height>
</Box>
</muse-op:BoxOperationResponse>
</soapenv:Body>
</soapenv:Envelope>
If I modify my wsdl and remove one attribute line
(xmlns="http://schemas.xmlsoap.org/wsdl/";) at the top of the file, I get the
following client side SOAP trace instead:
[CLIENT TRACE] SOAP envelope contents (incoming):
...
<soapenv:Body>
<muse-op:BoxOperationResponse
xmlns:muse-op="http://cisco.com/musebox/simple/box";
xmlns:tns="http://ws.apache.org/axis2";>
<Box xmlns:box="http://cisco.com/musebox/schemas/box";>
<box:width>555</box:width>
<box:height>555</box:height>
</Box>
</muse-op:BoxOperationResponse>
</soapenv:Body>
</soapenv:Envelope>
NOTE: The difference between the two traces are the namespaces in the <Box>
element.
If my client code calls XmlUtils.toString(XmlUtils.getFirstElement(response)),
I get:
<?xml version="1.0" encoding="UTF-8"?>
<Box xmlns="http://schemas.xmlsoap.org/wsdl/";
xmlns:box="http://cisco.com/musebox/schemas/box";>
<box:width>555</box:width>
<box:height>555</box:height>
</Box>
So there are 2 problems here:
1) Muse takes my operation output and puts on a response wrapper. In doing so,
it removes both the namespace and prefix of the <Box> element.
After removing the wrapper, the <Box> element now becomes useless because it
has no namespace, even though namespaces for child elements are properly
preserved. This is why my client code is running into errors when trying to
serialize the xml element back into a javabean (XmlBean object). It tries to
find/match the original namespace of the <Box> element, but it is nowhere to be
found.
2) In addition to Muse removing the top element's namespace, it tries to put in
a default one instead. If my wsdl file contains the attribute
xmlns="http://schemas.xmlsoap.org/wsdl/";
(which is defined in the samples), then Muse will take this namespace and set
it as the default in the <Box> element. So my client code complains of a
namespace mismatch. (The namespace xmlns:tns="http://ws.apache.org/axis2"; is
also inserted either by Muse or Axis2, but it isn't causing problems at this
moment.)
So I think Muse should either properly preserve the xml operation results
exactly as is, or put in the correct element namespaces and not override
incorrectly. Muse does preserve notification outputs correctly, but it doesn't
seem to do so for operations.
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