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From "Alexander Klimetschek (JIRA)" <j...@apache.org>
Subject [jira] Created: (COCOON-1908) Add query support to JCR source factory
Date Tue, 05 Sep 2006 17:34:22 GMT
Add query support to JCR source factory
---------------------------------------

                 Key: COCOON-1908
                 URL: http://issues.apache.org/jira/browse/COCOON-1908
             Project: Cocoon
          Issue Type: New Feature
          Components: Blocks: JCR
    Affects Versions: 2.2-dev (Current SVN)
            Reporter: Alexander Klimetschek


The current implementation of the JCRSourceFactory is missing the support for JCR queries
(XPath and SQL) and only allows direct paths (like "jcr://root/folder/file").

I have implemented a simple query handling (see patch). It supports both XPath (required for
JCR Level 1 compliance, thus any JCR implementation) and SQL (optional JCR feature). The query
strings given as Source-URIs must look like this:

XPath:

jcr://xpath!//root/*
(which maps to the xpath query "//root/*" which is passed on to the JCR Query)

jcr://!//root/*
(which is just a shorthand notation for the above, using Xpath)

SQL:

jcr://sql!select * from nt:base where jcr:path = '/root/myfile'
(well, which maps to the sql query "select * from nt:base where jcr:path = '/root/myfile'")

There is a restriction for the queries: the result to be returned must be a content-node with
no children and some streamable content. The JCRNodeSource class does not allow collections
to be returned. I am working on subclasses that will target this issue (using the XMLizable
interface) but this is not yet finished.

I tried to make the patch complete, including updated javadocs for the JCRSourceFactory class.

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