lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Israel Ekpo (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2460) Search Results Filtering Based on Bitwise Operations on Integer Fields
Date Fri, 14 May 2010 01:31:42 GMT
Search Results Filtering Based on Bitwise Operations on Integer Fields
----------------------------------------------------------------------

                 Key: LUCENE-2460
                 URL: https://issues.apache.org/jira/browse/LUCENE-2460
             Project: Lucene - Java
          Issue Type: New Feature
          Components: Search
            Reporter: Israel Ekpo
             Fix For: 3.1, 4.0


This package makes it possible to filter results returned from a query based on the results
of a bitwise operation on an integer field in the documents returned from the pre-constructed
query.

You can perform three basic types of operations on these integer fields

    * BitwiseOperation.BITWISE_AND (bitwise AND)
    * BitwiseOperation.BITWISE_OR (bitwise inclusive OR)
    * BitwiseOperation.BITWISE_XOR (bitwise exclusive OR)

You can also negate the results of these operations.

For example, imagine there is an integer field in the index named "flags" with the a value
8 (1000 in binary). The following results will be expected :

   1. A source value of 8 will match during a BitwiseOperation.BITWISE_AND operation, with
negate set to false.
   2. A source value of 4 will match during a BitwiseOperation.BITWISE_AND operation, with
negate set to true.

The BitwiseFilter constructor accepts the following values

    * The name of the integer field (A string)
    * The BitwiseOperation object. Example BitwiseOperation.BITWISE_XOR
    * The source value (an integer)
    * A boolean value indicating whether or not to negate the results of the operation
    * A pre-constructed org.apache.lucene.search.Query

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message