On Thu, Nov 11, 2010 at 1:25 PM, Burton-West, Tom <tburt...@umich.edu> wrote: > I do need to port my filter to lucene 3.x, so is there 3.x documentation > about use of CharTermAttributeImpl? > > Is this something that needs to be in the TokenStream examples in the 3.0.2 > org.apache.lucene.analysis package.html?
No, it is still unreleased, but is in the 3.x branch for what is scheduled to be the 3.1 release. So its not relevant to 3.0.2, it does not exist there. Additionally, even in 3.1 when this is released, your old TermAttribute code will continue to work transparently. Some tokenstreams can use CharTermAttribute and some can use TermAttribute interchangeably so you can upgrade at your leisure... The examples in 3.1 are changed to the new CharTermAttribute. its pretty trivial to upgrade if you don't need to take advantage of its new capabilities, mostly simple stuff like changing .setTermLength() to .setLength(), etc. If you want to use the new capabilities, they are that CharTermAttribute implements CharSequence and Appendable. This means for example its more easy to integrate with libraries (including java itself) that support these interfaces. For example: you can look at PatternReplaceFilter, in its ctor it just does Matcher matcher = pattern.matcher(charTermAtt). Then in its incrementToken, it can just call matcher.reset() and matcher.find() etc directly on the reusable attribute. Bottom line: with the way it is now, you don't have to change any code until lucene 4.0 unless you want to, and can keep using TermAttribute if you are happy with it. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org
