That pointed me in the right direction. Here's a working line of code:
String interestingText = new XPathExpression("//book[author='Neal
Stephenson']/title/text()").evaluate(exchange, String.class);
XPathExpression was the class I couldn't find :)
Thanks!
Claus Ibsen-2 wrote:
>
> On Wed, Oct 28, 2009 at 2:58 PM, Paul Phillips <[email protected]>
> wrote:
>>
>> Ok great.
>>
>> From this I've now realised that what I really want to do is grab a bunch
>> of
>> stuff from the incoming xml and store it as properties on the message for
>> future use in the route and then I don't really need the original xml
>> anymore.
>>
>> Now I could write some code like this:
>>
>> DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
>> domFactory.setNamespaceAware(true); // never forget this!
>> DocumentBuilder builder = domFactory.newDocumentBuilder();
>> Document doc = builder.parse(theIncomingXML);
>>
>> XPathFactory factory = XPathFactory.newInstance();
>> XPath xpath = factory.newXPath();
>> XPathExpression expr
>> = xpath.compile("//book[author='Neal Stephenson']/title/text()");
>>
>> Object result = expr.evaluate(doc, XPathConstants.NODESET);
>>
>> and store the result objects as properties on the message.
>>
>> Is there an "easier" way to do this with Camel? If I am in a class that
>> implements Processor, in the process method, can I access the xpath
>> "helper"
>> stuff that camel provides so that I can just (almost) say
>>
>> String interestingText = message.xpath("//book[author='Neal
>> Stephenson']/title/text()")
>>
>> and it'll handle the parsing etc for me?
>
> Yeah as you work in a Processor where you have the Exchange object handy
>
> Something like this. You may need to tweak it a bit.
>
> String interestingText = xpath("//book[author='Neal
> Stephenson']/title/text()").evaluate(exchange, String.class);
>
>
>
>>
>>
>>
>>
>>
>>
>> James.Strachan wrote:
>>>
>>> 2009/10/23 Paul Phillips <[email protected]>:
>>>>
>>>> Hi there
>>>>
>>>> bit of a beginner question here.
>>>>
>>>> I have a situation where I want to
>>>>
>>>> - get some xml from a jms queue
>>>> - send an id contained in the xml to a custom component i have written
>>>> (the
>>>> body of the request should be a string that looks like this: "ID=blah",
>>>> so I
>>>> use a bean to grab the id using xpath and change the body of the
>>>> exchange)
>>>> - this will return a message with a body that looks like "MATCHED=TRUE"
>>>> or
>>>> something
>>>> - if MATCHED=TRUE then I want to send some xml to a different endpoint.
>>>
>>> BTW you can do the above like this...
>>>
>>> public class MyBean {
>>>
>>> @Consume(uri="activemq:SomeQueue")
>>> pubilc void onXml(@XPath("/foo/ID") String myID, Document restOfBody)
>>> {
>>> // return the transformed payload
>>> return "MATCHED=TRUE"
>>> }
>>> }
>>>
>>> Notice Camel can do the XPath for you and inject the ID parameter to
>>> your transformer method (myID) - also notice the lack of any
>>> middleware APIs etc.
>>>
>>> for more details see
>>> http://camel.apache.org/pojo-consuming.html
>>>
>>> --
>>> James
>>> -------
>>> http://macstrac.blogspot.com/
>>>
>>> Open Source Integration
>>> http://fusesource.com/
>>>
>>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/beginner-question-tp26029591p26095101.html
>> Sent from the Camel - Users mailing list archive at Nabble.com.
>>
>>
>
>
>
> --
> Claus Ibsen
> Apache Camel Committer
>
> Author of Camel in Action: http://www.manning.com/ibsen/
> Open Source Integration: http://fusesource.com
> Blog: http://davsclaus.blogspot.com/
> Twitter: http://twitter.com/davsclaus
>
>
--
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http://www.nabble.com/beginner-question-tp26029591p26095588.html
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