I know this is the Lucene Java forum but it seemed vaguely appropriate.
I'm using Lucene from Scala and I needed to subclass a couple of the
analyzers to set the position increment gap. As the standard analysers
in question were all final classes I couldn't simply subclass them.
However it's perfectly possible to write Lucene analyzers entirely in
Scala. For example, here's the standard KeywordAnalyzer written in Scala
with a position increment gap of 100.
@throws(classOf[java.io.IOException])
class MultiKeywordAnalyzer extends Analyzer {
override protected def createComponents(fieldName: String, reader:
Reader):
TokenStreamComponents = {
new TokenStreamComponents(new KeywordTokenizer(reader))
}
override def getPositionIncrementGap(fieldName: String) = 100
}
Hopefully this might help someone in the future who googles to see if
it's possible :-)
--
Alan Burlison
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