for the first part of the question, maybe you forgot the set the
namespace context (the prefix->nsuri map) in the expression?
setNamespaces(Map<String,String> namespaces)
for the second part, you probably need to parse the file that will
scan all the namespaces declared and you will see them in the
corresponding namespace declaration handler.
2013/10/31 Nurali Techie <nurali.tec...@yahoo.com>:
> Hi Friends,
>
> I want to execute xpath in my code. It means; I have xpath expression, I
> have exchange object with In Message.
>
> Using 'XPathExpression' and 'XPathBuilder' classes; I succeed to do so.
> Below is the code snippet.
>
> XPathExpression xpathExprObj = new
> XPathExpression("/userResponse/User/id");
> xpathExprObj.setResultType(String.class);
>
> Object result = xpathExprObj.evaluate(exchange, Object.class);
>
> But, if I have xpath with namespace (i.e xpath = /ns0:userResponse/User/id)..
> above code throwing exception .. saying - Prefix must resolve to a namespace:
> ns0
>
> Part of Exception:
>
> org.apache.camel.builder.xml.InvalidXPathExpression: Invalid xpath:
> /ns0:userResponse/User/id. Reason: javax.xml.xpath.XPathExpressionException
> at
> org.apache.camel.builder.xml.XPathBuilder.evaluateAs(XPathBuilder.java:767)
> ~[bundlefile:2.11.2-sap-02]
> at org.apache.camel.builder.xml.XPathBuilder.evaluate(XPathBuilder.java:748)
> ~[bundlefile:2.11.2-sap-02]
> at org.apache.camel.builder.xml.XPathBuilder.evaluate(XPathBuilder.java:168)
> ~[bundlefile:2.11.2-sap-02]
> at *** My project code calling from here ..
> ..........
> -------
> Caused by:
> com.sun.org.apache.xpath.internal.domapi.XPathStylesheetDOM3Exception: Prefix
> must resolve to a namespace: ns0
> at
> com.sun.org.apache.xpath.internal.compiler.XPathParser.errorForDOM3(XPathParser.java:653)
> ~[na:1.6.0_33]
> at
> com.sun.org.apache.xpath.internal.compiler.Lexer.mapNSTokens(Lexer.java:638)
> ~[na:1.6.0_33]
> at com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:265)
> ~[na:1.6.0_33]
> at com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:96)
> ~[na:1.6.0_33]
> at
> com.sun.org.apache.xpath.internal.compiler.XPathParser.initXPath(XPathParser.java:110)
> ~[na:1.6.0_33]
> at com.sun.org.apache.xpath.internal.XPath.<init>(XPath.java:176)
> ~[na:1.6.0_33]
> at com.sun.org.apache.xpath.internal.XPath.<init>(XPath.java:264)
> ~[na:1.6.0_33]
> at
> com.sun.org.apache.xpath.internal.jaxp.XPathImpl.compile(XPathImpl.java:385)
> ~[na:1.6.0_33]
>
> Upon digging; I found that .. I need to set namespaces to XPathExpression
> object .. So, I need list of all namespace.
> I am using blueprint beans.xml .. so I need list of all namespaces defined
> with blueprint tag in beans.xml.
>
> I have camel exchange and camel endpoint object with me.
> I want programmatic solution.
>
> Thanks,
> Nurali
