Hi Eugen,
we use xml beans within streaming xml processing and had a similar problem.
The helper class simply throws away the elements until it reads the given tag.
When its on the element, the xml will be copied into a stringbuffer which
can be then parsed by your xml bean.
For stream processing we are using woodstox.
(I hope there are not to many errors into following code as I only adapted it
straight from our sources without testing ...)
Best wishes,
Andreas.
XMLInputFactory xmlInputFactory = XMLInputFactory.newInstance();
XMLOutputFactory xmlOutputFactory = XMLOutputFactory.newInstance();
StringWriter sw = new StringWriter();
XmlOptions xo = new XmlOptions();
xo.setLoadStripWhitespace();
xo.setValidateTreatLaxAsSkip();
xo.setSaveOuter();
ArrayList validationErrors = new ArrayList();
xo.setErrorListener(validationErrors);
XMLEventReader xmlReader = xmlInputFactory.createXMLEventReader(<your
inputstream>);
XMLEventWriter xmlWriter = xmlOutputFactory.createXMLEventWriter(sw);
// skip pragma/prefix
StaxHelper.readUntilElement(xmlReader, xmlWriter, "ProjectDataSet");
// read element
StaxHelper.readElement(xmlReader, xmlWriter, sw, "ProjectDataSet");
ParentOfProjectDataSetType popdst =
ParentOfProjectDataSetType.Factory.parse(sw.toString(), xo);
ProjectDataSetType pdst = popdst.getProjectDataSet();
public class StaxHelper {
public static XMLEvent readUntilElement(XMLEventReader xmlReader,
XMLEventWriter xmlWriter, String name)
throws XMLStreamException, NpsAppError {
XMLEvent event = null;
for (boolean isFirstElement = true; xmlReader.hasNext();
isFirstElement = false) {
event = xmlReader.peek();
if (event.isStartElement()) {
if (!isFirstElement &&
name.equals(((StartElement)event).getName().getLocalPart())) {
if (xmlWriter != null)
xmlWriter.flush();
return event;
}
}
event = xmlReader.nextEvent();
if (xmlWriter != null) xmlWriter.add(event);
if (event.isEndElement() &&
name.equals(((EndElement)event).getName().getLocalPart())) {
if (xmlWriter != null) xmlWriter.flush();
return event;
}
}
// throws exception after last element
throw new NpsAppError(
NpsErrorConst.ERROR_ELEMENT_NOT_FOUND,
NpsErrorConst.XML_SUBSYSTEM,
name);
}
public static void readElement(XMLEventReader xmlReader, XMLEventWriter
xmlWriter, StringWriter sw, String name)
throws XMLStreamException, NpsAppError {
StringBuffer sb = sw.getBuffer();
XMLEvent evt = xmlReader.peek();
boolean isAtElement = (evt.isStartElement() &&
name.equals(((StartElement)evt).getName().getLocalPart()));
if (!isAtElement) {
readUntilElement(xmlReader, xmlWriter, name); /* search
start */
}
xmlWriter.flush();
sb.setLength(0);
readUntilElement(xmlReader, xmlWriter, name); /* search end */
xmlWriter.flush();
int startTagIdx = sb.indexOf("<");
if (startTagIdx > 0) sb.delete(0, startTagIdx);
}
}
-----Ursprüngliche Nachricht-----
Von: Eugen Okon [mailto:[email protected]]
Gesendet: Dienstag, 16. Dezember 2008 16:21
An: [email protected]
Betreff: Re: parse a part of xml
Hi Andy,
my interactions with the web service are limited to very basic operations, so i
do not use any special framework ecxept apache commons. I get the response as
an InputStream. Thats the reason i am search for a way to skip a part of the
response. Even in the case i could get just the body of the soap message there
would be some "pre-"tags generated by the Microsoft Project Web Service which i
do not want to model as java objects. i have seen that the parse method has an
additional parameter : XMLOptions, but i can't find out whether its helpfull
for my aim or not. There should be a possibility to tell the parse which node
shoult be treated as root - or not? I have search for similar problems in the
mailinglist but i can't find anything. I think there should be more users which
need this functionality or is my approach just wrong :)?
-------- Original-Nachricht --------
> Datum: Tue, 16 Dec 2008 08:59:41 -0600
> Von: Andy Putnins <[email protected]>
> An: [email protected]
> Betreff: Re: parse a part of xml
> How are you handing the SOAP protocol messages? I have done this in the
> past by utilizing AXIS
> running in a Tomcat container to decode the SOAP messages. AXIS includes a
> wsdl2java utility
> to generate server-side stubs and implementation classes. Then you can use
> XMLBeans to process the
> contents of the SOAP messages.
>
> - Andy
>
> On Tue, 16 Dec 2008 08:55:15 +0100 "Eugen Okon" wrote:
> > Hi Jacob,
> > thanks a lot for your answer!
> > There is no problem to get the values of the projectdataset, in the
> case that i copy/p
> aste the
> > <ProjectDataSet>
> > Information I need!!!!
> > </ProjectDataSet>
> > part to a new file and use it. The exception is caused (in my opinion)
> because the roo
> t element of the doc i am trying to parse is <soap:envelope> and not
> <ProjectDataSet
> >. What i am searching for is a possibility to tell the parser to
> skip all tags till
> <ProjectDataSet>. The Exception i get is:
> >
> > error: The document is not a
> projectdata...@http://schemas.microsoft.com/office/projec
> t/server/webservices/ProjectDataSet/: document element mismatch got
> envel...@http://
> schemas.xmlsoap.org/soap/envelope/
> > at
> org.apache.xmlbeans.impl.store.Locale.verifyDocumentType(Locale.java:458)
> > at
> org.apache.xmlbeans.impl.store.Locale.autoTypeDocument(Locale.java:363)
> >
> > with best regards
> > Eugen
> > -------- Original-Nachricht --------
> > > Datum: Mon, 15 Dec 2008 09:15:22 -0800
> > > Von: "Jacob Danner" <[email protected]>
> > > An: [email protected]
> > > Betreff: Re: parse a part of xml
> >
> > > Hi Eugen,
> > > Are you having troubles getting the value of the projectdataset
> > > element or are you just getting an exception when you are trying to
> > > parse it?
> > > Is there a projectDatasetType Class available? Have you tried that?
> > > What is the exception you are seeing?
> > > -jacobd
> > >
> > > On Mon, Dec 15, 2008 at 1:41 AM, Eugen Okon <[email protected]> wrote:
> > > > Hello,
> > > > i am new to xmlbeans, so maybe my question is a kind of "basics"
> for the
> > > framework. I am writing an application which communicates with Ms
> Project
> > > PSI Web Services. The application gets a SOAP response from Ms
> Project. The
> > > structure of this response is described below:
> > > >
> > > > <soap:envelope>
> > > > …..
> > > > <soap:body>
> > > > <ReadProjectResponse>
> > > > …
> > > > <ProjectDataSet>
> > > > Information I need!!!!
> > > > </ProjectDataSet>
> > > > …
> > > > <ReadProjectResponse>
> > > > </soap:body>
> > > > </soap:envelope>
> > > >
> > > > Ok so now I can finally describe the problem. I have a xsd schema
> which
> > > models the structure of <ProjectDataSet>. From these xsd I've
> generated
> > > java code with xmlbeans's ant task. Now I am searching for an elegant
> > > possibility to parse this kind of responses. This means
> > > ProjectDataSetDocument.Factory.parse(is); should parse the
> inputstream beginning wit
> h the
> > > <ProjectDataSet>. In other cases I am understandably getting an
> exception. I hope
> > > someone can help me solving this problem.
> > > >
> > > > Eugen
> > > >
> > > > --
> > > > Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kann`s mit
> > > allen: http://www.gmx.net/de/go/multimessenger
> > > >
> > > >
> ---------------------------------------------------------------------
> > > > To unsubscribe, e-mail: [email protected]
> > > > For additional commands, e-mail: [email protected]
> > > >
> > > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: [email protected]
> > > For additional commands, e-mail: [email protected]
> >
> > --
> > Sensationsangebot verlängert: GMX FreeDSL - Telefonanschluss + DSL
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> >
>
> - Andy
> ________________________________________________________________
> Andris Putnins, Principal
> Lett Engineering phone: (847) 997-0002
> 300 Bramble Lane fax: (847) 550-0633
> Deer Park, IL 60011 email: [email protected]
>
>
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