Sven Amann created SOLR-12736:
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Summary: Parallel Iteration of Lists
Key: SOLR-12736
URL: https://issues.apache.org/jira/browse/SOLR-12736
Project: Solr
Issue Type: Task
Security Level: Public (Default Security Level. Issues are Public)
Affects Versions: master (8.0)
Reporter: Sven Amann
Solr/contrib/analysis-extras contains the class `BooleanWeight`, which
maintains two lists that are repeatedly iterated over in parallel. While both
lists do have the same length, this is not immediately obvious from the
locations the iterate them. A future change may lead to the lists getting our
of sync, which would break the iterations. Moreover, there is no established
language feature for iterating two lists, which is why the iteration is
implemented differently in various locations throughout the class.
I created a patch that joins the two lists into one, which simplifies the
iteration, unifies the implementation in all places, and prevents that the two
lists get out of sync without becoming aware of the parallel iterations.
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