hello--
i'm using MoreLikeThis. i'm trying to run the document comparison across more
than one field in my index, but i'm not at all sure that it's actually
happening -- when i examine the constructed query, only one field is mentioned!
here's my code:
FileReader reader = new FileReader("/Users/onpause/aTest.txt");
IndexReader ir = IndexReader.open(index);
IndexSearcher is = new IndexSearcher(index);
MoreLikeThis mlt = new MoreLikeThis(ir);
String [] mltFields = new String[]
{"conceptSearch","abstract","contents","conceptDisplay"};
mlt.setFieldNames(mltFields);
Analyzer analyzer = new StandardAnalyzer();
mlt.setAnalyzer(analyzer);
Query mltQuery = mlt.like(reader);
Hits hits = is.search(mltQuery);
System.out.println("query: "+ mltQuery.toString() + " ; fields: " +
mlt.getFieldNames().toString() + " ::: params: "+mlt.describeParams());
here's what that last println prints out:
query: contents:rainbow contents:edinburgh contents:actress contents:festival
contents:end ;
fields: [Ljava.lang.String;@199939 :::
params: maxQueryTerms : 25
minWordLen : 0
maxWordLen : 0
fieldNames : "conceptSearch, abstract, contents, conceptDisplay
boost : false
minTermFreq : 1
minDocFreq : 1
why does the query only contain references to the field "contents"? i expected
it to contain references to all 4 fields i assigned, something like:
(contents:rainbow contents:edinburgh contents:actress contents:festival
contents:end) (abstract:rainbow... etc etc
when the field "contents" is in the list, it ends up being the only one visibly
used in the printed query -- the others seem suppressed, at least from the
print...
i really want to make sure i'm MLT-ing across all 4 fields, because i indexed
then with different boosts, hoping this would influence the MLT result
scoring...
also, and i'm sure this is because i'm such i naive java user, how can i
convert this object reference [Ljava.lang.String;@199939 to something more
useful to read?
thanks in advance for any advice!
best--
--chris sizemore
http://www.bbc.co.uk/
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