CODEWITHSUNDEEP
xqueryelementsaxon
Sachin DG
Sachin DG

Reputation: 65

How to get Element node in transform of xml using s9api XQuery transformation

I am using saxon s9api to transform xml with XQuery. With below code it is possible but I'm getting XPathException.

The XQueryEvaluator expects Element node but I am not sure how to get Element from Document node.

I have tried to iterating and passing the children of the document. 

// first java class
Processor processor = new Processor(false);
DocumentBuilder db = processor.newDocumentBuilder();
XdmNode doc = db.build(new StreamSource(new 
StringReader(innerResponse.getBody())));

// second java class where new processor is created.
XQueryCompiler compiler = processor.newXQueryCompiler();
XQueryExecutable executable = 
compiler.compile(getXQueryFileAsString(interfaceId));
XQueryEvaluator query = executable.load();

query.setExternalVariable(new QName("result1"), ((XdmNode) doc));
XdmValue nodes = query.evaluate();


// XQuery
(:: pragma bea:global-element-parameter parameter="$result1" element="result" location="../XMLSchemas/myxsd.xsd" ::)
(:: pragma bea:global-element-return element="result" location="../XMLSchemas/anotherxsd.xsd" ::)

declare namespace xf = "http://tempuri.org/somepath/XQueries/Result/";

declare function xf:Result($result1 as element(result),

// input xml
<?xml version='1.0' encoding='UTF-8'?>
<result>
        <code>OK</code>
        <somedata>
        ..
        </somedata>
</result>

Exception:

XPTY0004: The required item type of the value of variable $result1 is element(Q{}result); the supplied value doc() does not match. The supplied value is a document node net.sf.saxon.s9api.SaxonApiException: The required item type of the value of variable $result1 is element(Q{}result); the supplied value doc() does not match. The supplied value is a document node at net.sf.saxon.s9api.XQueryEvaluator.evaluate(XQueryEvaluator.java:430)

Upvotes: 0

Views: 430

Answers (1)

Michael Kay
Michael Kay

Reputation: 163262

Assuming that the result element is the outermost element of the document, and that you are using Saxon 9.9, use

doc.select(child("result")).asNode();

to get the result element.

You will need 

import static net.sf.saxon.s9api.streams.Steps.child;

to access the child() method

Upvotes: 0

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