[jira] [Updated] (SLING-4752) New resource query API

["Carsten Ziegeler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SLING-4752?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Carsten Ziegeler updated SLING-4752:
------------------------------------
    Fix Version/s:     (was: API 2.15.0)
                       (was: Resource Resolver 1.5.0)
                       (was: JCR Resource 2.9.0)

> New resource query API
> ----------------------
>
>                 Key: SLING-4752
>                 URL: https://issues.apache.org/jira/browse/SLING-4752
>             Project: Sling
>          Issue Type: Improvement
>          Components: API, JCR, ResourceResolver
>            Reporter: Carsten Ziegeler
>         Attachments: api-patch.txt, resourceresolver-patch.txt
>
>
> Discussion thread:
> http://mail-archives.apache.org/mod_mbox/sling-dev/201505.mbox/%3C555983F6.7020100%40apache.org%3E
> Starting mail:
> The current resource query api has several problems:
> - it's using the JCR spec to define a query
> - it's not clear which queries are supported by providers
> - queries are string based
> - implementing queries in a resource provider is way too hard as this
> would require to implement the complete jcr query api.
> I've created a draft for a new, object based API at [1]. The main idea
> is to use a builder pattern to create Query objects. This are immutable
> and have a unique identifier. The QueryManager service can be used to
> execute a query in the context of a resource resolver. The manager
> delegates the query to the providers. As each Query object has this
> identifier, implementations can use this to cache the parsing of the query.
> In addition to the query object you can pass in query instructions to
> specify a limit or range for the query.
> Obviously this is a reduced set compared to the full fledged jcr search
> api, however it should be suitable for the majority of use cases.
> [1]
> https://svn.apache.org/repos/asf/sling/whiteboard/cziegeler/api-v3/src/main/java/org/apache/sling/api/resource/query/



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