Example usage for org.apache.lucene.search MultiTermQuery SCORING_BOOLEAN_REWRITE

Introduction

In this page you can find the example usage for org.apache.lucene.search MultiTermQuery SCORING_BOOLEAN_REWRITE.

Prototype

RewriteMethod SCORING_BOOLEAN_REWRITE

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Document

A rewrite method that first translates each term into BooleanClause.Occur#SHOULD clause in a BooleanQuery, and keeps the scores as computed by the query.

Usage

From source file:org.codelibs.elasticsearch.index.query.support.QueryParsers.java

License:Apache License

public static MultiTermQuery.RewriteMethod parseRewriteMethod(@Nullable String rewriteMethod,
        @Nullable MultiTermQuery.RewriteMethod defaultRewriteMethod) {
    if (rewriteMethod == null) {
        return defaultRewriteMethod;
    }/*from w ww  . j  av  a  2s.com*/
    if (CONSTANT_SCORE.match(rewriteMethod)) {
        return MultiTermQuery.CONSTANT_SCORE_REWRITE;
    }
    if (SCORING_BOOLEAN.match(rewriteMethod)) {
        return MultiTermQuery.SCORING_BOOLEAN_REWRITE;
    }
    if (CONSTANT_SCORE_BOOLEAN.match(rewriteMethod)) {
        return MultiTermQuery.CONSTANT_SCORE_BOOLEAN_REWRITE;
    }

    int firstDigit = -1;
    for (int i = 0; i < rewriteMethod.length(); ++i) {
        if (Character.isDigit(rewriteMethod.charAt(i))) {
            firstDigit = i;
            break;
        }
    }

    if (firstDigit >= 0) {
        final int size = Integer.parseInt(rewriteMethod.substring(firstDigit));
        String rewriteMethodName = rewriteMethod.substring(0, firstDigit);

        if (TOP_TERMS.match(rewriteMethodName)) {
            return new MultiTermQuery.TopTermsScoringBooleanQueryRewrite(size);
        }
        if (TOP_TERMS_BOOST.match(rewriteMethodName)) {
            return new MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite(size);
        }
        if (TOP_TERMS_BLENDED_FREQS.match(rewriteMethodName)) {
            return new MultiTermQuery.TopTermsBlendedFreqScoringRewrite(size);
        }
    }

    throw new IllegalArgumentException("Failed to parse rewrite_method [" + rewriteMethod + "]");
}

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