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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2401) Improve performance of CharTermAttribute(Impl) and also fully implement Appendable
Date Sun, 18 Apr 2010 20:43:49 GMT
Improve performance of CharTermAttribute(Impl) and also fully implement Appendable
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                 Key: LUCENE-2401
                 URL: https://issues.apache.org/jira/browse/LUCENE-2401
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Analysis
            Reporter: Uwe Schindler
            Assignee: Uwe Schindler
             Fix For: 3.1


The Appendable.append(CharSequence) method in CharTermAttributes is good for general use.
But like StringBuilder has for some common use cases specialized methods, this does the same
and adds separate append methods for String, StringBuilder and CharTermAttribute itsself.
This methods enable the compiler to directly link the specialized methods and don't use the
instanceof checks. The unspecialized method only does the instanceof checks for longer CharSequences
(>8 chars), else it simply iterates.

This patch also fixes the required special "null" handling. append() methods are required
by Appendable to append "null", if the argument is null. I dont like this, but its required.
Maybe we should document, that we dont dont support it. Otherwise, JDK's formatter fails with
formatting null.

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