Examples of DisjunctionMaxQuery

org.apache.lucene.search.DisjunctionMaxQuery
A query that generates the union of documents produced by its subqueries, and that scores each document with the maximum score for that document as produced by any subquery, plus a tie breaking increment for any additional matching subqueries. This is useful when searching for a word in multiple fields with different boost factors (so that the fields cannot be combined equivalently into a single search field). We want the primary score to be the one associated with the highest boost, not the sum of the field scores (as BooleanQuery would give). If the query is "albino elephant" this ensures that "albino" matching one field and "elephant" matching another gets a higher score than "albino" matching both fields. To get this result, use both BooleanQuery and DisjunctionMaxQuery: for each term a DisjunctionMaxQuery searches for it in each field, while the set of these DisjunctionMaxQuery's is combined into a BooleanQuery. The tie breaker capability allows results that include the same term in multiple fields to be judged better than results that include this term in only the best of those multiple fields, without confusing this with the better case of two different terms in the multiple fields.

Examples of org.apache.lucene.search.DisjunctionMaxQuery

    @Override public Query getFieldQuery(String xField, String queryText, boolean quoted) throws ParseException {
        if (xField != null) {
            return super.getFieldQuery(xField, queryText, quoted);
        }
        if (settings.useDisMax()) {
            DisjunctionMaxQuery disMaxQuery = new DisjunctionMaxQuery(settings.tieBreaker());
            boolean added = false;
            for (String field : settings.fields()) {
                Query q = super.getFieldQuery(field, queryText, quoted);
                if (q != null) {
                    added = true;
                    applyBoost(field, q);
                    disMaxQuery.add(q);
                }
            }
            if (!added) {
                return null;
            }

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Examples of org.apache.lucene.search.DisjunctionMaxQuery

            Query q = super.getFieldQuery(xField, queryText, true);
            applySlop(q, slop);
            return q;
        }
        if (settings.useDisMax()) {
            DisjunctionMaxQuery disMaxQuery = new DisjunctionMaxQuery(settings.tieBreaker());
            boolean added = false;
            for (String field : settings.fields()) {
                Query q = super.getFieldQuery(field, queryText, true);
                if (q != null) {
                    added = true;
                    applyBoost(field, q);
                    applySlop(q, slop);
                    disMaxQuery.add(q);
                }
            }
            if (!added) {
                return null;
            }

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Examples of org.apache.lucene.search.DisjunctionMaxQuery

    @Override protected Query getRangeQuery(String xField, String part1, String part2, boolean inclusive) throws ParseException {
        if (xField != null) {
            return super.getRangeQuery(xField, part1, part2, inclusive);
        }
        if (settings.useDisMax()) {
            DisjunctionMaxQuery disMaxQuery = new DisjunctionMaxQuery(settings.tieBreaker());
            boolean added = false;
            for (String field : settings.fields()) {
                Query q = super.getRangeQuery(field, part1, part2, inclusive);
                if (q != null) {
                    added = true;
                    applyBoost(field, q);
                    disMaxQuery.add(q);
                }
            }
            if (!added) {
                return null;
            }

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Examples of org.apache.lucene.search.DisjunctionMaxQuery

    @Override protected Query getPrefixQuery(String xField, String termStr) throws ParseException {
        if (xField != null) {
            return super.getPrefixQuery(xField, termStr);
        }
        if (settings.useDisMax()) {
            DisjunctionMaxQuery disMaxQuery = new DisjunctionMaxQuery(settings.tieBreaker());
            boolean added = false;
            for (String field : settings.fields()) {
                Query q = super.getPrefixQuery(field, termStr);
                if (q != null) {
                    added = true;
                    applyBoost(field, q);
                    disMaxQuery.add(q);
                }
            }
            if (!added) {
                return null;
            }

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Examples of org.apache.lucene.search.DisjunctionMaxQuery

    @Override protected Query getWildcardQuery(String xField, String termStr) throws ParseException {
        if (xField != null) {
            return super.getWildcardQuery(xField, termStr);
        }
        if (settings.useDisMax()) {
            DisjunctionMaxQuery disMaxQuery = new DisjunctionMaxQuery(settings.tieBreaker());
            boolean added = false;
            for (String field : settings.fields()) {
                Query q = super.getWildcardQuery(field, termStr);
                if (q != null) {
                    added = true;
                    applyBoost(field, q);
                    disMaxQuery.add(q);
                }
            }
            if (!added) {
                return null;
            }

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Examples of org.apache.lucene.search.DisjunctionMaxQuery

    @Override protected Query getFuzzyQuery(String xField, String termStr, float minSimilarity) throws ParseException {
        if (xField != null) {
            return super.getFuzzyQuery(xField, termStr, minSimilarity);
        }
        if (settings.useDisMax()) {
            DisjunctionMaxQuery disMaxQuery = new DisjunctionMaxQuery(settings.tieBreaker());
            boolean added = false;
            for (String field : settings.fields()) {
                Query q = super.getFuzzyQuery(field, termStr, minSimilarity);
                if (q != null) {
                    added = true;
                    applyBoost(field, q);
                    disMaxQuery.add(q);
                }
            }
            if (!added) {
                return null;
            }

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Examples of org.apache.lucene.search.DisjunctionMaxQuery

    }
    final IndexReader indexReader = DirectoryReader.open(directory);
    assertEquals(1, indexReader.numDocs());
    final IndexSearcher indexSearcher = newSearcher(indexReader);
    try {
      final DisjunctionMaxQuery query = new DisjunctionMaxQuery(1);
      query.add(new SpanTermQuery(new Term(FIELD, "{fox}")));
      query.add(new SpanTermQuery(new Term(FIELD, "fox")));
        // final Query phraseQuery = new SpanNearQuery(new SpanQuery[] {
        // new SpanTermQuery(new Term(FIELD, "{fox}")),
        // new SpanTermQuery(new Term(FIELD, "fox")) }, 0, true);


      TopDocs hits = indexSearcher.search(query, 1);

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Examples of org.apache.lucene.search.DisjunctionMaxQuery

    }
    final IndexReader indexReader = DirectoryReader.open(directory);
    try {
      assertEquals(1, indexReader.numDocs());
      final IndexSearcher indexSearcher = newSearcher(indexReader);
      final DisjunctionMaxQuery query = new DisjunctionMaxQuery(1);
      query.add(new SpanTermQuery(new Term(FIELD, "{fox}")));
      query.add(new SpanTermQuery(new Term(FIELD, "fox")));
      // final Query phraseQuery = new SpanNearQuery(new SpanQuery[] {
      // new SpanTermQuery(new Term(FIELD, "{fox}")),
      // new SpanTermQuery(new Term(FIELD, "fox")) }, 0, true);


      TopDocs hits = indexSearcher.search(query, 1);

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Examples of org.apache.lucene.search.DisjunctionMaxQuery

      @Override
      protected Analyzer getIndexAnalyzer(String field) {
        return analyzer;
      }
    };
    DisjunctionMaxQuery query = new DisjunctionMaxQuery(0);
    query.add(new WildcardQuery(new Term("body", "te*")));
    TopDocs topDocs = searcher.search(query, null, 10, Sort.INDEXORDER);
    assertEquals(2, topDocs.totalHits);
    String snippets[] = highlighter.highlight("body", query, searcher, topDocs);
    assertEquals(2, snippets.length);
    assertEquals("This is a <b>test</b>.", snippets[0]);

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Examples of org.apache.lucene.search.DisjunctionMaxQuery

    }
    final IndexReader indexReader = DirectoryReader.open(directory);
    try {
      assertEquals(1, indexReader.numDocs());
      final IndexSearcher indexSearcher = newSearcher(indexReader);
      final DisjunctionMaxQuery query = new DisjunctionMaxQuery(1);
      query.add(new SpanTermQuery(new Term(FIELD, "{fox}")));
      query.add(new SpanTermQuery(new Term(FIELD, "fox")));
      // final Query phraseQuery = new SpanNearQuery(new SpanQuery[] {
      // new SpanTermQuery(new Term(FIELD, "{fox}")),
      // new SpanTermQuery(new Term(FIELD, "fox")) }, 0, true);


      TopDocs hits = indexSearcher.search(query, 1);

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