Query by node name

[Joan Xiao <jx...@polivec.com>]

Hello,

I'm having some problem when I try to query the repository by node name.

I have a custom node type, say my:file, which extends nt:file. And I'm
able to add nodes of this custom node type and then retrieve them
successfully.

Now I need to determine whether a node of certain name exists in the
repository. If I use the query string: //element(*, my:file), it
correctly returns all nodes of the type my:file. So suppose I have a
node of this type with path /Documents/test.txt, it does get returned.

But if I replace * by a node name, i.e., //element(test.txt, my:file),
it doesn't return anything even though the file exists and is returned
from the previous query. 

I've also tried the following queries:
/Documents//element(*, my.file): returns nothing
/Documents//element(test.txt, my.file): returns nothing
/jcr:root//element(*, my.file): returns nothing
/jcr:root/Documents//element(*, my.file): returns nothing
/jcr:root/Documents//element(test.txt, my.file): returns nothing

I've also tried to use SQL query, but the result is consistent with
XPATH.

Is there anything I'm doing wrong here?

Thanks for any help.

Joan

Re: Query by node name

[Marcel Reutegger <ma...@gmx.net>]

Joan Xiao wrote:
> But if I replace * by a node name, i.e., //element(test.txt, my:file),
> it doesn't return anything even though the file exists and is returned
> from the previous query. 

I'm not able to reproduce this. could you please file a jira issue on 
http://issues.apache.org/jira/browse/JCR and provide a code fragment 
that reproduces the problem you described?

> I've also tried the following queries:
> /Documents//element(*, my.file): returns nothing
> /Documents//element(test.txt, my.file): returns nothing
> /jcr:root//element(*, my.file): returns nothing
> /jcr:root/Documents//element(*, my.file): returns nothing
> /jcr:root/Documents//element(test.txt, my.file): returns nothing

there are two issues with the above queries:

1) /Documents will never return any nodes because absolute XPath queries 
must always begin with /jcr:root (see spec section 6.6.4.3 for details)
you may also use a relative path:
Documents//elements(*, my:file)

2) my.file ? I guess this should be my:file. Unless you have a node type 
without a namespace prefix and a local name 'my.file' this will of 
course never match.

regards
  marcel