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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2010/10/19 15:20:30 UTC
[jira] Updated: (LUCENE-1937) Add more methods to manipulate
QueryNodeProcessorPipeline elements
[ https://issues.apache.org/jira/browse/LUCENE-1937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Muir updated LUCENE-1937:
--------------------------------
Attachment: LUCENE-1937.patch
no functional changes to the patch, i just updated it to apply cleanly to trunk.
I'd like to commit this improvement, so we can then replace the PrecedenceQueryParser with LUCENE-1938
This is a much simpler way to implement the functionality and would remove the additional duplicate javacc
grammar, and make maintenance easier.
> Add more methods to manipulate QueryNodeProcessorPipeline elements
> ------------------------------------------------------------------
>
> Key: LUCENE-1937
> URL: https://issues.apache.org/jira/browse/LUCENE-1937
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/*
> Affects Versions: 2.9
> Reporter: Adriano Crestani
> Priority: Minor
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-1937.patch, LUCENE-1937.patch, LUCENE-1937_10_13_2009.patch
>
>
> QueryNodeProcessorPipeline allows the user to define a list of processors to process a query tree. However, it's not very flexible when the user wants to extend/modify an already created pipeline, because it only provides an add method, which only allows the user to append a new processor to the pipeline.
> So, I propose to add new methods to manipulate the processor in a pipeline. I think the methods should not consider an index position when modifying the pipeline, hence the index position in a pipeline does not mean anything, a processor has a meaning when it's after or before another processor. Therefore, I suggest the methods should always consider another processor when inserting/modifying the pipeline. For example, insertAfter(processor, newProcessor), which will insert the "newProcessor" after the "processor".
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