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goffinf
PostPosted: Mon Apr 28, 2008 11:29 am    Post subject: Reading Message element in JavaCompute Reply with quote

Chevalier

Joined: 05 Nov 2005
Posts: 401

version: 6.0

I am trying to read the names and values of various parts of an inbound message in a Java node, but I am not getting what I expect. In this case the message inbound is actually a SOAP Fault but that probably doesn't matter. Anyway this is what is happening :-

inbound message :

<soap:Fault xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<faultcode>soap:Server</faultcode>
<faultstring>something bad happened</faultstring>
<faultactor>urn:someEndpoint</faultactor>
<detail>
<NUError xmlns="urn:aviva:nu:dis:schema:entities:common:nuerror:v01">
<ErrorID>99999</ErrorID>
<ErrorType>UNEXPECTED</ErrorType>
<ErrorDescription>Boooom</ErrorDescription>
<TimeStamp>2008-04-24T15:28:51Z</TimeStamp>
</NUError>
</detail>
</soap:Fault>

in Java node :-


public int run(MbMessageAssembly ma) throws MbException {
...
MbElement xmlnscRoot;
MbElement soapFaultRoot;
MbMessage msg = null;

...
msg.getRootElement().createElementAsLastChildFromBitstream(msgBytes, MbXMLNSC.PARSER_NAME, null, null, null, 0, 1208, 0);

MbMessageAssembly newAssembly = new MbMessageAssembly(ma, msg);

msg.finalizeMessage(MbMessage.FINALIZE_VALIDATE);


// get the parser domain (XMLNSC)
xmlnscRoot = newAssembly.getMessage().getRootElement().getLastChild();

// get the name of the root node (should be Fault)
soapFaultRoot = xmlnscRoot.getFirstChild();

String rootNodeName = soapFaultRoot.getName();
String rootNodeNamespace = soapFaultRoot.getNamespace();

// Everything OK so far : rootNodeName = 'Fault' and rootNodeName contains the SOAP 1.1 namespaceURI

// IF I TRY TO HAVE A LOOK AT THE FIRST CHILD THINGS GO AWRY ??

String soapFaultRootChildName;
soapFaultRootChildName = soapFaultRoot.getFirstChild().getName();

At this point soapFaultRootChildName contains the value 'soap', that is the prefix of the Fault element ??

I can use an evaluateXPath method to get to the child nodes of Fault (faultcode, faultstring, etc..) so why can't I do it with getFirstChild or any of the other methods ???

Thanks

Fraser.
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jefflowrey
PostPosted: Mon Apr 28, 2008 11:33 am    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

The first child of soap:Fault is likely to be xmlns:soap...
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I am *not* the model of the modern major general.
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goffinf
PostPosted: Mon Apr 28, 2008 1:38 pm    Post subject: Reply with quote

Chevalier

Joined: 05 Nov 2005
Posts: 401

jefflowrey wrote:
The first child of soap:Fault is likely to be xmlns:soap...


Jeff,

you're right, but why, thats just the namespace declaration for that node. What am I not understanding here ?

Is it to do with the way the XMLNSC parser works ??

Fraser.
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kimbert
PostPosted: Mon Apr 28, 2008 4:35 pm    Post subject: Reply with quote

Jedi Council

Joined: 29 Jul 2003
Posts: 5542
Location: Southampton

Quote:
Is it to do with the way the XMLNSC parser works ?
It certainly is. Here's your chance to learn something important:
- The message broker tree is not a DOM tree
- Attributes are children of the parent tag
- Child elements are also children of the parent tag

So how can the programmer tell the difference?
http://publib.boulder.ibm.com/infocenter/wmbhelp/v6r1m0/topic/com.ibm.etools.mft.doc/ac67192_.htm

That's a v6.1 page, by the way. If on v6.0, section 'Field types for controlling output format' and everything afterwards does not apply.
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goffinf
PostPosted: Tue Apr 29, 2008 12:03 am    Post subject: Reply with quote

Chevalier

Joined: 05 Nov 2005
Posts: 401

kimbert wrote:
Quote:
Is it to do with the way the XMLNSC parser works ?
It certainly is. Here's your chance to learn something important:
- The message broker tree is not a DOM tree
- Attributes are children of the parent tag
- Child elements are also children of the parent tag

So how can the programmer tell the difference?
http://publib.boulder.ibm.com/infocenter/wmbhelp/v6r1m0/topic/com.ibm.etools.mft.doc/ac67192_.htm

That's a v6.1 page, by the way. If on v6.0, section 'Field types for controlling output format' and everything afterwards does not apply.


Thanks, I am familiar using this style in eSQL, but how do I ask for the first field of [say] TYPE element (XMLNSC.Field) in Java ?

E.g.

MBElement soapFaultRoot;
soapFaultRoot = xmlnscRoot.getFirstChild();

How do I change the above to say the first child of type XMLNSC.Field ?

Fraser.
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goffinf
PostPosted: Tue Apr 29, 2008 12:07 am    Post subject: Reply with quote

Chevalier

Joined: 05 Nov 2005
Posts: 401

Ok, not so good example since there should only be a single child of root, so lets say :-

MBElement soapFaultRoot;
MBElement firstChild;
soapFaultRoot = xmlnscRoot.getFirstChild();

firstChild= soapFaultRoot .getFirstChild();

How do I change the above to say the first child of type XMLNSC.Field ?

goffinf wrote:

E.g.

MBElement soapFaultRoot;
soapFaultRoot = xmlnscRoot.getFirstChild();

How do I change the above to say the first child of type XMLNSC.Field ?

Fraser.
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