5 Replies Latest reply on Oct 8, 2013 11:16 AM by rhauch

jcr modeshape 3.2.0 getNodes by a name pattern

fazileh Oct 7, 2013 9:58 AM

Hi,

I need to get nodes that they are duplicated. like: myNode[2].

when I get one node by root.getNodes("myNode[2]"); every thing is OK! But Now I want to get all of nodes that have "[2]" in the end of names, I use this root.getNodes("*[2]); I get this exception: (javax.jcr.RepositoryException) javax.jcr.RepositoryException: The "*[2]" name pattern contained the '[' character, which is not allowed in a name pattern

I searched and I found this page: Chapter 8. Querying and Searching using JCR

I run the code by unicode character : root.getNodes("*005D"); ]---> 005D, but does not solved.
I will appreciate if you help me to solve it.

Thank you.

1. Re: jcr modeshape 3.2.0 getNodes by a name pattern

rhauch Oct 8, 2013 11:17 AM (in response to fazileh)
That definitely is a bug - can you please log a bug in our JIRA? The problem may be in how the method you're calling, namely "getNodes( String nameGlobs)", tries to split the name globs on the '|' character. If that's the case, then a simple workaround would be to use the other form of the method that takes a String array:

root.getNodes( new String[]{"*[2]"} );

Let us know if that works.

UPDATE: See below for the resolution to this problem.
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2. Re: jcr modeshape 3.2.0 getNodes by a name pattern

fazileh Oct 8, 2013 1:48 AM (in response to rhauch)
Randall Hauch wrote:

root.getNodes( new String[]{"*[2]"} );

This line throws an Exception: (javax.jcr.RepositoryException) javax.jcr.RepositoryException: The "*[2]" name pattern contained the '[' character, which is not allowed in a name pattern
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3. Re: jcr modeshape 3.2.0 getNodes by a name pattern

hchiorean Oct 8, 2013 2:11 AM (in response to fazileh)

I've opened [MODE-2069] Incorrect regexp parsing when retrieving nodes via the node.getNodes() method - JBoss Issue Tracker
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4. Re: jcr modeshape 3.2.0 getNodes by a name pattern

fazileh Oct 8, 2013 2:59 AM (in response to hchiorean)

Thank you.
I was involved in code.
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5. Re: jcr modeshape 3.2.0 getNodes by a name pattern

rhauch Oct 8, 2013 11:16 AM (in response to fazileh)

The specification stipulates that only the node's names (which do not include the same-name-sibling index) are used to find a match with the "getNodes(...)" methods. Since node names themselves can contain characters such as '/', ':', '[', ']' and '|' only if they are escaped (see ModeShape's encode and decode methods), any pattern that uses these characters will never match any existing node.

To date, ModeShape would throw an exception if a name glob were created with such invalid characters, but this is actually not per the specification. Instead, ModeShape is expected to simply process the patterns without throwing an exception. This is what we will correct with MODE-2069 in 3.6.

Therefore, you cannot use a name glob to find nodes that have specific same-name-siblings.
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