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https://issues.apache.org/jira/browse/DIRSERVER-971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12512679
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Ersin Er commented on DIRSERVER-971:
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We need these nodes to filter search filters before sending them to the core.
Considering DIRSERVER-955, suppose we have a filter like (!(x=y)(m=n)). If,
according to the ACI information, it's not permitted to FilterMatch x, we need
to replace this node with UNDEFINED; if it's not permitted to FilterMatch y, we
need to replace this node with FALSE. So the core evaluator module will
directly know values of these nodes without querying them from backend.
> Provide specific filter nodes for True, False and Undefined, and handle them
> in the search engine
> -------------------------------------------------------------------------------------------------
>
> Key: DIRSERVER-971
> URL: https://issues.apache.org/jira/browse/DIRSERVER-971
> Project: Directory ApacheDS
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.5.0, 1.0
> Reporter: Ersin Er
> Fix For: 1.5.2
>
>
> We need to be able to construct or modify search filters with special nodes
> for True, False and Undefined. And the search engine should be able to handle
> these. This is especially needed for DIRSERVER-955.
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