[hibernate-issues] [Hibernate-JIRA] Created: (HSEARCH-154) Provide a facility to access Lucene query explanations
Nick Vincent (JIRA)
noreply at atlassian.com
Thu Feb 14 09:37:33 EST 2008
Provide a facility to access Lucene query explanations
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Key: HSEARCH-154
URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-154
Project: Hibernate Search
Issue Type: New Feature
Components: query
Affects Versions: 3.0.0.GA
Environment: Hibernate 3.2
Reporter: Nick Vincent
Priority: Minor
Attachments: explainpatch.txt
Hibernate search should provide a facility where it is possible access the Lucene explanation for a Hit object. I've attached a patch that allows it to do this.
I've implemented this only at the FullTextQueryImpl level such that it does not appear in the public API as it seems rather Lucene specific to include in the FullTextQuery interface.
Using this patch it is possible to access the explanation for a document by casting FullTextQuery to its implementation class.
It is also necessary to be able to discover the internal Lucene document id for a document in order to be able to request an Explanation object. I've added this to the projection constants and modified DocumentExtractor to utilise it.
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