[hibernate-issues] [Hibernate-JIRA] Commented: (HSEARCH-133) Allow ovrriding DefaultSimilarity for indexing and searching

[John Griffin (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_28859 ] 

John Griffin commented on HSEARCH-133:
--------------------------------------

The user needs the ability to modify how document scoring is calculated by subclassing Similarity and being allowed to change the idf (inverse document frequency) calculation, the tf (term frequency) calculation, various normalization factors and others calculations performed by the class. The new class must be applied to both the index writer and reader.

> Allow ovrriding DefaultSimilarity for indexing and searching
> ------------------------------------------------------------
>
>                 Key: HSEARCH-133
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-133
>             Project: Hibernate Search
>          Issue Type: New Feature
>          Components: engine, query
>    Affects Versions: 3.0.1
>            Reporter: John Griffin
>            Assignee: John Griffin
>
> Ability to override DefaultSimilarity for indexing and searching should be implemented. Access is necessary in both places because changing only one and then querying has undefined results as far as scores are concerned.

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