Hi Saliya
Following shown my scenarios.
Scenario 1 - without detach on root element
String str = "<hello><something>wow
nice</something><anotherthing><insideanother>great</insideanother></anotherthing></hello>";
XMLStreamReader parser = XMLInputFactory.newInstance().
createXMLStreamReader(new
ByteArrayInputStream(str.getBytes()));
StAXOMBuilder builder = new StAXOMBuilder(parser);
OMElement root = builder.getDocumentElement();
*// root.detach();*
AXIOMXPath xpath = new AXIOMXPath("//hello/something");
OMElement node = (OMElement) xpath.selectSingleNode(root);
System.out.println(node == null);
if (node != null) {
System.out.println(node.getText());
}
Out put :
false
* wow nice*
Scenario 2 - with detach on root element
String str = "<hello><something>wow
nice</something><anotherthing><insideanother>great</insideanother></anotherthing></hello>";
XMLStreamReader parser = XMLInputFactory.newInstance().
createXMLStreamReader(new
ByteArrayInputStream(str.getBytes()));
StAXOMBuilder builder = new StAXOMBuilder(parser);
OMElement root = builder.getDocumentElement();
* root.detach();*
AXIOMXPath xpath = new AXIOMXPath("//hello/something");
OMElement node = (OMElement) xpath.selectSingleNode(root);
System.out.println(node == null);
if (node != null) {
System.out.println(node.getText());
}
Output
true
In second case , XPath have not been evaluated correctly.
Thanks
Indika
On Sat, Jun 20, 2009 at 9:40 PM, Saliya Ekanayake <esal...@gmail.com> wrote:
> Hi,
>
> Um, I am not really clarified with the problem here. I agree that the full
> tree should be built before we can evaluate XPath. Adding the element to a
> new OMDocument, however, just to get this done seems not right.
> Additionally, the original OMDocument created by the builder will be there
> even if you detach the element. Detach will only remove the element from the
> tree to which it belongs. To check this, you can get the builder from the
> detached element and ask for the OMDocument. IMHO, we can call
> result.build() if necessary.
>
> Btw. I am not clear why XPath doesn't work on the detached element. I did a
> simple test as follows and XPath worked, may be I have missed something
> (please let me know if so).
>
> public static void main(String[] args) throws XMLStreamException,
> JaxenException {
> String str = "<hello><something>wow
> nice</something><anotherthing><insideanother>great</insideanother></anotherthing></hello>";
> StAXOMBuilder builder = new StAXOMBuilder(new
> ByteArrayInputStream(str.getBytes()));
> OMElement root = builder.getDocumentElement();
>
> OMDocument doc = builder.getDocument();
> System.out.println(doc == null);
>
> OMElement anotherthing = root.getFirstChildWithName(new
> QName("anotherthing"));
> anotherthing.detach();
>
> doc = ((StAXOMBuilder)anotherthing.getBuilder()).getDocument();
> System.out.println(doc == null);
>
> AXIOMXPath xpath = new AXIOMXPath("//insideanother");
> OMElement node = (OMElement) xpath.selectSingleNode(anotherthing);
> System.out.println(node.getText());
> }
>
> Thanks,
> Saliya
>
> On Sat, Jun 20, 2009 at 4:45 AM, Andreas Veithen <
> andreas.veit...@gmail.com> wrote:
>
>> StAXOMBuilder actually already creates an OMDocument (which can be
>> retrieved by the getDocument method). The important thing is that we
>> need to make sure that the Axiom tree is fully built before closing
>> the input stream. I guess that the detach method is used because it
>> has the side effect of fully building the element and because
>> OMDocument has no method to build the entire tree (see WSCOMMONS-479).
>>
>> This gives us two solutions:
>>
>> - Use StAXOMBuilder#getDocument and iterate over its children to make
>> sure the document is fully built.
>> - Continue to use "detach" and add the element to a new document, as
>> you suggested. Note that you should not use OMDocumentImpl directly,
>> but create it using the OMFactory.
>>
>> Andreas
>>
>> On Fri, Jun 19, 2009 at 09:30, indika kumara<indika.k...@gmail.com>
>> wrote:
>> > Devs
>> >
>> > $subject is due to we do 'detach()' on picked resource OMElement .
>> > If I add detached element to a OMDocument as a child, it works
>> >
>> > Existing code SImpleURLRegistry
>> >
>> > result.detach();
>> > inputStream.close();
>> >
>> >
>> > Modified code
>> >
>> > result.detach();
>> > OMDocumentImpl omDocument = new OMDocumentImpl();
>> > omDocument.addChild(result);
>> > inputStream.close();
>> >
>> >
>> > Are there any best solution other than what I did ? I haven't deep
>> > AXIOM knowledge? Could anyone help me?
>> >
>> > Thanks
>> > Indika
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: dev-unsubscr...@synapse.apache.org
>> > For additional commands, e-mail: dev-h...@synapse.apache.org
>> >
>> >
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: dev-unsubscr...@synapse.apache.org
>> For additional commands, e-mail: dev-h...@synapse.apache.org
>>
>>
>
>
> --
> Saliya Ekanayake
> http://www.esaliya.blogspot.com
> http://www.esaliya.wordpress.com
>
