org.apache.lucene.queries.BlendedTermQuery Java Examples

The following examples show how to use org.apache.lucene.queries.BlendedTermQuery. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source File: MultiMatchQueryBuilder.java From Elasticsearch with Apache License 2.0

6 votes

public Query blendTerm(Term term, MappedFieldType fieldType) {
    if (blendedFields == null) {
        return super.blendTerm(term, fieldType);
    }
    final Term[] terms = new Term[blendedFields.length];
    float[] blendedBoost = new float[blendedFields.length];
    for (int i = 0; i < blendedFields.length; i++) {
        terms[i] = blendedFields[i].newTerm(term.text());
        blendedBoost[i] = blendedFields[i].boost;
    }
    if (options.commonTermsCutoff() != null) {
        return BlendedTermQuery.commonTermsBlendedQuery(
            terms, blendedBoost, false, options.commonTermsCutoff());
    }

    if (tieBreaker == 1.0f) {
        return BlendedTermQuery.booleanBlendedQuery(terms, blendedBoost, false);
    }
    return BlendedTermQuery.dismaxBlendedQuery(terms, blendedBoost, tieBreaker);
}

Example #2

Source File: CustomFieldQuery.java From Elasticsearch with Apache License 2.0

6 votes

@Override
void flatten(Query sourceQuery, IndexReader reader, Collection<Query> flatQueries, float boost) throws IOException {
    if (sourceQuery instanceof SpanTermQuery) {
        super.flatten(new TermQuery(((SpanTermQuery) sourceQuery).getTerm()), reader, flatQueries, boost);
    } else if (sourceQuery instanceof ConstantScoreQuery) {
        flatten(((ConstantScoreQuery) sourceQuery).getQuery(), reader, flatQueries, boost);
    } else if (sourceQuery instanceof FunctionScoreQuery) {
        flatten(((FunctionScoreQuery) sourceQuery).getSubQuery(), reader, flatQueries, boost);
    } else if (sourceQuery instanceof MultiPhrasePrefixQuery) {
        flatten(sourceQuery.rewrite(reader), reader, flatQueries, boost);
    } else if (sourceQuery instanceof FiltersFunctionScoreQuery) {
        flatten(((FiltersFunctionScoreQuery) sourceQuery).getSubQuery(), reader, flatQueries, boost);
    } else if (sourceQuery instanceof MultiPhraseQuery) {
        MultiPhraseQuery q = ((MultiPhraseQuery) sourceQuery);
        convertMultiPhraseQuery(0, new int[q.getTermArrays().size()], q, q.getTermArrays(), q.getPositions(), reader, flatQueries);
    } else if (sourceQuery instanceof BlendedTermQuery) {
        final BlendedTermQuery blendedTermQuery = (BlendedTermQuery) sourceQuery;
        flatten(blendedTermQuery.rewrite(reader), reader, flatQueries, boost);
    } else {
        super.flatten(sourceQuery, reader, flatQueries, boost);
    }
}

Example #3

Source File: MultiMatchQuery.java From Elasticsearch with Apache License 2.0

6 votes

@Override
public Query blendTerm(Term term, MappedFieldType fieldType) {
    if (blendedFields == null) {
        return super.blendTerm(term, fieldType);
    }
    final Term[] terms = new Term[blendedFields.length];
    float[] blendedBoost = new float[blendedFields.length];
    for (int i = 0; i < blendedFields.length; i++) {
        terms[i] = blendedFields[i].newTerm(term.text());
        blendedBoost[i] = blendedFields[i].boost;
    }
    if (commonTermsCutoff != null) {
        return BlendedTermQuery.commonTermsBlendedQuery(terms, blendedBoost, false, commonTermsCutoff);
    }

    if (tieBreaker == 1.0f) {
        return BlendedTermQuery.booleanBlendedQuery(terms, blendedBoost, false);
    }
    return BlendedTermQuery.dismaxBlendedQuery(terms, blendedBoost, tieBreaker);
}

Example #4

Source File: LtrQueryTests.java From elasticsearch-learning-to-rank with Apache License 2.0

5 votes

public void testNoMatchQueries() throws IOException {
    String userQuery = "brown cow";

    Term[] termsToBlend = new Term[]{new Term("field",  userQuery.split(" ")[0])};

    Query blended = BlendedTermQuery.dismaxBlendedQuery(termsToBlend, 1f);
    List<PrebuiltFeature> features = Arrays.asList(
            new PrebuiltFeature(null, new TermQuery(new Term("field",  "missingterm"))),
            new PrebuiltFeature(null, blended));

    checkModelWithFeatures(features, null, null);
}

Example #5

Source File: LtrQueryTests.java From elasticsearch-learning-to-rank with Apache License 2.0

3 votes

public void testOnRewrittenQueries() throws IOException {
    String userQuery = "brown cow";

    Term[] termsToBlend = new Term[]{new Term("field",  userQuery.split(" ")[0])};

    Query blended = BlendedTermQuery.dismaxBlendedQuery(termsToBlend, 1f);
    List<Query> features = Arrays.asList(new TermQuery(new Term("field",  userQuery.split(" ")[0])), blended);

    checkModelWithFeatures(toPrebuildFeatureWithNoName(features), null, null);
}