Hi All,
I have got the solution .. :)
I have used xpath expression to get all namespace. Here is the part of code:
String searchAllNamespacesXpathExpr = "//namespace::*"; // xpath
expr to search all namespace
XPathExpression nsXpath = new
XPathExpression(searchAllNamespacesXpathExpr);
nsXpath.setResultType(NodeList.class);
NodeList nsNodeList = (NodeList) nsXpath.evaluate(exchange,
Object.class); // this NodeList contains all namespaces
From NodeList object, I prepare namespace Map which I set to XpathExpression
object.
XPathExpression xpathExprObj = new
XPathExpression("/ns0:userResponse/User/id)");
xpathExprObj.setNamespaces(namespaceMap); // set namespace Map
which was prepared from NodeList
xpathExprObj.setResultType(String.class);
Object result = xpathExprObj.evaluate(exchange, Object.class);
Now, xpath with namespace (i.e /ns0:userResponse/User/id) will be evaluated
correctly.
Thanks Aki and All for you help.
Let me know; in case you see any flaw in above way.
Cheers,
Nurali
On Friday, November 1, 2013 2:50 PM, Nurali Techie <[email protected]>
wrote:
Thanks Aki for your thoughts ..
Yes, I should call setNamespaces() .. but I need namespace Map which I can pass
to ..
So, my question remain same .. is there any API or service .. which I can use
to get Namespace Map ..
And I hv Camel Exchange and Camel Endpoint object with me ..
Parsing blueprint beans.xml and to extract Namespace from <blueprint> tag;
looks hack and dirty way ..
Also, I don't know how can I get beans.xml InputStream to parse for ..
I also debugged and found that .. for standard <xpath> tag having namespace
xpath in beans.xml .. the blueprint container do magic to pass all namespace
while creating xpath expression object. It means; namespace list is with
blueprint container .. but I don't know how I can reached to there when I only
have Camel Exchange and Endpoint object with me.
Thanks,
Nurali
On Thursday, October 31, 2013 9:24 PM, Aki Yoshida <[email protected]> wrote:
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 <[email protected]>:
> 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
