Search Results Filtering Based on Bitwise Operations on Integer Fields
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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
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