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https://issues.apache.org/jira/browse/LUCENE-1753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler resolved LUCENE-1753.
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Resolution: Fixed
Assignee: Uwe Schindler
Committed revision: 824116
> Make not yet final core/contrib TokenStream/Filter implementations final
> ------------------------------------------------------------------------
>
> Key: LUCENE-1753
> URL: https://issues.apache.org/jira/browse/LUCENE-1753
> Project: Lucene - Java
> Issue Type: Task
> Components: Analysis
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Fix For: 3.0
>
>
> Lucene's analysis package is designed in a way, that you can plug different
> *implementations* of analysis in chains of TokenStreams and TokenFilters. An
> analyzer is build of several TokenStreams/Filters that do the tokenization of
> text. If you want to modify the behaviour of tokenization, you implement a
> new subclass of TokenStream/-Filter/Tokenizer.
> Most classes in the core are correctly implemented like that. They are
> itsself final or their implementation methods are final (CharTokenizer).
> A lot of problems with backwards-compatibility of LUCENE-1693 are some
> classes in Lucene's core/contrib not yet final:
> - KeywordTokenizer should be declared final or its implementation methods
> should be final
> - StandardTokenizer should be declared final or its implementation methods
> should be final
> - ISOLatin1Filter is deprecated, so it will be removed in 3.0, nothing to do.
> CharTokenizer is the abstract base class of several other classes. The design
> is correct: Child classes cannot override the implementation, they can only
> change the behaviour of this final implementation.
> Contrib should be checked, that all implementation classes are at least final
> or they are designed in the same way like CharTokenizer.
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