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| Parse XML from a string in a java-computenode to a value |
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| neckh00 |
 Posted: Wed Nov 14, 2007 6:47 am Post subject: Parse XML from a string in a java-computenode to a value |
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Newbie
Joined: 14 Nov 2007
Posts: 5
Location: Netherlands
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Is there anyone who can help me?
From a subflow (consider this a blackbox) i have to recreate a message in a java-computenode. (It has to be a java-computenode (company-policy...))
The arriving message is containing xml-data as string in a MbElement. This MbElement has the name "bapiInfo" and is situated in the global-environment
under "/Variables/bapi/out/". The value content of this string can be something like this:
"<?xml version="1.0"?><bapiInfo xmlns="http://schemas.belastingdienst.nl/BAPI/BapiInfo/1.0.5"><messageInfo><intPID>HHHHH</intPID></messageInfo>/bapiInfo>"
What has to be done is, to retreive the value of "bapiInfo/messageInfo/intPID"
I already get lost after the toBitstream() function.
I'm new to WBIMB and java. I'm using Brokertoolkit 6.0.2 (IFIX009) on a XP machine for development.
Thanks already!
Hans
MbMessage environment = contact admin.getGlobalEnvironment();
MbElement envRoot = environment.getRootElement();
//get bapiInfo; bapiInfo is a string supplied in the global-environment in XML-format.
MbElement bapiInfoBlob = envRoot.getFirstElementByPath("/Variables/bapi/out/bapiInfo");
// bapiInfoBlob contains the info i expected at this point
//parse the content to a byte array bapiInfoByte
byte[] bapiInfoByte = bapiInfoBlob.toBitstream(null,null,MbXMLNS.PARSER_NAME, 0, 0, 0);
// HERE something goes wrong i think; bapiInfoByte seems to contain no data at all
String dummy3 = bapiInfoByte.toString();
// contains "[B@58bd0aad"; i do not recognize this content at all, neither its hex or dec. representation.
//extend the global environment with the parsed byte-array
MbElement bapiInfo = envRoot.createElementAsLastChildFromBitstream(bapiInfoByte, MbXMLNS.PARSER_NAME, null, null, null, 0, 0, 0);
bapiInfo.setName = "bapiInfo";
// there is an element with the name "bapiInfo" created in the global-environment, but it is empty
//find the ProxessID
MbElement iPID = bapiInfo.getFirstElementByPath("/bapiInfo/messageInfo/intPID");
// This gives a xml-parse exception because a part of the messagetree does not exist
//get its value
String iPIDVal = bapiInfo.getValue().toString(); |
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| jefflowrey |
| Posted: Wed Nov 14, 2007 7:30 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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toBitstream()? 
createElementAsLastChildFromBitstream? 
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I am *not* the model of the modern major general. |
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| fjb_saper |
| Posted: Wed Nov 14, 2007 2:26 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Use the SAP parser and define your tree elements. BAPIINFO is a known SAP structure... Or use the SAP adapter and access the tree...
The question really is whether your BapiInfo element has been deserialized in the Tree (or is represented as XML in your input) or whether it is just a raw block of data with the required SAP structure... 
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| jefflowrey |
| Posted: Wed Nov 14, 2007 4:59 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Okay.
So I was reading your code wrong.
The first thing is likely that Environment.Variables.bapi.out.bapiInfo has lost it's parser information.
The second is that it's a CHARACTER variable, likely, and not an XMLNS tree that can be toBitstreamed.
So you can just .getValue() on it to get a String().
Then you can extract the bytes[] from that.
Then you can call createLastElementFromBitstream() and that should parse your data.
The value from toString that you don't recognize is the default representation of what is essentially a java pointer. It's something that doesn't have a useful toString method...
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I am *not* the model of the modern major general. |
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| neckh00 |
| Posted: Thu Nov 15, 2007 4:15 am Post subject: |
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Newbie
Joined: 14 Nov 2007
Posts: 5
Location: Netherlands
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Jeff, Thank you very much!!
It works perfectly now.
Below the code that does the job.
If you still have any comments, i will be glad to hear them.
Thanks again,
Hans
//parse bapi-info
//find bapiInfo string in the global-environment message-tree
MbElement bapiInfoBlob = envRoot.getFirstElementByPath("/Variables/bapi/out/bapiInfo");
//convert the found string to a byte array
byte[] bapiInfoByte = bapiInfoBlob.getValue().toString().getBytes();
//add the created byte array to the root of the global-environment and give it the name "parsedBapiInfo"
MbElement bapiInfoTree = envRoot.createElementAsLastChildFromBitstream(bapiInfoByte, MbXMLNSC.PARSER_NAME, null, null, null, 0, 0, 0);
bapiInfoTree.setName("ParsedBapiInfo");
//Get APDN and CPDN from bapi-info
MbElement bapiInfo = envRoot.getFirstElementByPath("/ParsedBapiInfo/bapiInfo");
String cpdn = bapiInfo.getFirstElementByPath("messageInfo/internalProcessID").getValue().toString();
String apdn = bapiInfo.getFirstElementByPath("messageInfo/externalProcessID").getValue().toString(); |
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