Example usage for org.apache.lucene.queries.mlt MoreLikeThis MoreLikeThis

Introduction

In this page you can find the example usage for org.apache.lucene.queries.mlt MoreLikeThis MoreLikeThis.

Prototype

public MoreLikeThis(IndexReader ir, TFIDFSimilarity sim) 

Source Link

Usage

From source file:org.elasticsearch.common.lucene.search.MoreLikeThisQuery.java

License:Apache License

@Override
public Query rewrite(IndexReader reader) throws IOException {
    MoreLikeThis mlt = new MoreLikeThis(reader, similarity == null ? new DefaultSimilarity() : similarity);

    mlt.setFieldNames(moreLikeFields);//from  www .j  av a2s. c  om
    mlt.setAnalyzer(analyzer);
    mlt.setMinTermFreq(minTermFrequency);
    mlt.setMinDocFreq(minDocFreq);
    mlt.setMaxDocFreq(maxDocFreq);
    mlt.setMaxQueryTerms(maxQueryTerms);
    mlt.setMinWordLen(minWordLen);
    mlt.setMaxWordLen(maxWordLen);
    mlt.setStopWords(stopWords);
    mlt.setBoost(boostTerms);
    mlt.setBoostFactor(boostTermsFactor);
    //LUCENE 4 UPGRADE this mapps the 3.6 behavior (only use the first field)
    BooleanQuery bq = (BooleanQuery) mlt.like(new FastStringReader(likeText), moreLikeFields[0]);
    BooleanClause[] clauses = bq.getClauses();

    bq.setMinimumNumberShouldMatch((int) (clauses.length * percentTermsToMatch));

    bq.setBoost(getBoost());
    return bq;
}

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