Namespace list - blueprint - xpath
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.(XPath.java:176) ~[na:1.6.0_33]
at com.sun.org.apache.xpath.internal.XPath.(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
Re: Namespace list - blueprint - xpath
for the first part of the question, maybe you forgot the set the
namespace context (the prefix->nsuri map) in the expression?
setNamespaces(Map 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 :
> 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.(XPath.java:176)
> ~[na:1.6.0_33]
> at com.sun.org.apache.xpath.internal.XPath.(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
Re: Namespace list - blueprint - xpath
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 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 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 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 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 :
> 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.(XPath.java:176)
> ~[na:1.6.0_33]
> at com.sun.org.apache.xpath.internal.XPath.(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
Re: Namespace list - blueprint - xpath
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
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 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 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 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 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 :
> 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.(XPath.java:176)
> ~[na:1.6.0_33]
> at com.sun.org.apache.xpath.internal.XPath.(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
Re: Namespace list - blueprint - xpath
I don't know what you are trying to do actually after reading your response.
If what you want to do is to pick up the node
/ns0:userResponse/User/id where prefix ns0 is mapped to a certain
namespace uri which you know, say urn:whichiknow you can just set it
in the map using an arbitrary prefix like ns9=>urn:whichiknow and look
up the node /ns9:userResponse/User/id.
regards, aki
2013/11/1 Nurali Techie :
> 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
> 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 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 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
> 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 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 :
>> 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.(XPath.java:176)
>> ~[na:1.6.0_33]
>> at com.sun.org.apache.xpath.internal.XPath.(XPath.java:264)
>> ~[na:1.6.0_33]
>> at
>> com.sun.org.apac
