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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-1678) Deprecate Analyzer.tokenStream
Date Tue, 09 Jun 2009 16:43:07 GMT
Deprecate Analyzer.tokenStream
------------------------------

                 Key: LUCENE-1678
                 URL: https://issues.apache.org/jira/browse/LUCENE-1678
             Project: Lucene - Java
          Issue Type: Bug
          Components: Analysis
            Reporter: Michael McCandless
            Assignee: Michael McCandless
            Priority: Minor
             Fix For: 2.9


The addition of reusableTokenStream to the core analyzers unfortunately broke back compat
of external subclasses:

    http://www.nabble.com/Extending-StandardAnalyzer-considered-harmful-td23863822.html

On upgrading, such subclasses would silently not be used anymore, since Lucene's indexing
invokes reusableTokenStream.

I think we should should at least deprecate Analyzer.tokenStream, today, so that users see
deprecation warnings if their classes override this method.  But going forward when we want
to change the API of core classes that are extended, I think we have to  introduce entirely
new classes, to keep back compatibility.

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