On 5/7/2013 6:26 PM, Colin Pollock wrote:
Hi, I want to modify how the QueryScorer selects fragments for snippeting. I
want to add a small boost for fragments that contain certain terms (e.g.
"great", "amazing") to the unique term occurrence score. But I don't want
these words to actually be highlighted, so I can't just add them to the
query (or make a WeightedSpamTerm[] myself containing both the query terms
and word list terms and pass it to the QueryScorer).
I tried to subclass lucene.search.highlight.QueryScorer and override the
getTokenScore method. But the scorer's PositionIncrementAttribute field is
private. I could change the Lucene source or copy QueryScorer's code into a
new subclass.
Attributes have a slightly unusual API: you can get handle on them by
overriding init() (still calling super.init()), and calling:
posIncAtt = tokenStream.addAttribute(PositionIncrementAttribute.class);
setting your *own* posIncAtt (just like in QueryScorer.init()) -- you
will get the *same* instance of the attribute
-Mike
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