Examples with BoostQuery org.apache.lucene.search.BoostQuery used on opensource projects

Example 46 with BoostQuery

use of org.apache.lucene.search.BoostQuery in project lucene-solr by apache.

the class ExtendedDismaxQParser method getBoostFunctions.

/**
   * Parses all function queries
   */
protected List<Query> getBoostFunctions() throws SyntaxError {
    List<Query> boostFunctions = new LinkedList<>();
    if (config.hasBoostFunctions()) {
        for (String boostFunc : config.boostFuncs) {
            if (null == boostFunc || "".equals(boostFunc))
                continue;
            Map<String, Float> ff = SolrPluginUtils.parseFieldBoosts(boostFunc);
            for (String f : ff.keySet()) {
                Query fq = subQuery(f, FunctionQParserPlugin.NAME).getQuery();
                Float b = ff.get(f);
                if (null != b && b.floatValue() != 1f) {
                    fq = new BoostQuery(fq, b);
                }
                boostFunctions.add(fq);
            }
        }
    }
    return boostFunctions;
}

Example 47 with BoostQuery

use of org.apache.lucene.search.BoostQuery in project lucene-solr by apache.

the class WeightedSpanTermExtractor method extract.

/**
   * Fills a <code>Map</code> with {@link WeightedSpanTerm}s using the terms from the supplied <code>Query</code>.
   * 
   * @param query
   *          Query to extract Terms from
   * @param terms
   *          Map to place created WeightedSpanTerms in
   * @throws IOException If there is a low-level I/O error
   */
protected void extract(Query query, float boost, Map<String, WeightedSpanTerm> terms) throws IOException {
    if (query instanceof BoostQuery) {
        BoostQuery boostQuery = (BoostQuery) query;
        extract(boostQuery.getQuery(), boost * boostQuery.getBoost(), terms);
    } else if (query instanceof BooleanQuery) {
        for (BooleanClause clause : (BooleanQuery) query) {
            if (!clause.isProhibited()) {
                extract(clause.getQuery(), boost, terms);
            }
        }
    } else if (query instanceof PhraseQuery) {
        PhraseQuery phraseQuery = ((PhraseQuery) query);
        Term[] phraseQueryTerms = phraseQuery.getTerms();
        if (phraseQueryTerms.length == 1) {
            extractWeightedSpanTerms(terms, new SpanTermQuery(phraseQueryTerms[0]), boost);
        } else {
            SpanQuery[] clauses = new SpanQuery[phraseQueryTerms.length];
            for (int i = 0; i < phraseQueryTerms.length; i++) {
                clauses[i] = new SpanTermQuery(phraseQueryTerms[i]);
            }
            // sum position increments beyond 1
            int positionGaps = 0;
            int[] positions = phraseQuery.getPositions();
            if (positions.length >= 2) {
                // positions are in increasing order.   max(0,...) is just a safeguard.
                positionGaps = Math.max(0, positions[positions.length - 1] - positions[0] - positions.length + 1);
            }
            //if original slop is 0 then require inOrder
            boolean inorder = (phraseQuery.getSlop() == 0);
            SpanNearQuery sp = new SpanNearQuery(clauses, phraseQuery.getSlop() + positionGaps, inorder);
            extractWeightedSpanTerms(terms, sp, boost);
        }
    } else if (query instanceof TermQuery || query instanceof SynonymQuery) {
        extractWeightedTerms(terms, query, boost);
    } else if (query instanceof SpanQuery) {
        extractWeightedSpanTerms(terms, (SpanQuery) query, boost);
    } else if (query instanceof ConstantScoreQuery) {
        final Query q = ((ConstantScoreQuery) query).getQuery();
        if (q != null) {
            extract(q, boost, terms);
        }
    } else if (query instanceof CommonTermsQuery) {
        // specialized since rewriting would change the result query 
        // this query is TermContext sensitive.
        extractWeightedTerms(terms, query, boost);
    } else if (query instanceof DisjunctionMaxQuery) {
        for (Query clause : ((DisjunctionMaxQuery) query)) {
            extract(clause, boost, terms);
        }
    } else if (query instanceof ToParentBlockJoinQuery) {
        extract(((ToParentBlockJoinQuery) query).getChildQuery(), boost, terms);
    } else if (query instanceof ToChildBlockJoinQuery) {
        extract(((ToChildBlockJoinQuery) query).getParentQuery(), boost, terms);
    } else if (query instanceof MultiPhraseQuery) {
        final MultiPhraseQuery mpq = (MultiPhraseQuery) query;
        final Term[][] termArrays = mpq.getTermArrays();
        final int[] positions = mpq.getPositions();
        if (positions.length > 0) {
            int maxPosition = positions[positions.length - 1];
            for (int i = 0; i < positions.length - 1; ++i) {
                if (positions[i] > maxPosition) {
                    maxPosition = positions[i];
                }
            }
            @SuppressWarnings({ "unchecked", "rawtypes" }) final List<SpanQuery>[] disjunctLists = new List[maxPosition + 1];
            int distinctPositions = 0;
            for (int i = 0; i < termArrays.length; ++i) {
                final Term[] termArray = termArrays[i];
                List<SpanQuery> disjuncts = disjunctLists[positions[i]];
                if (disjuncts == null) {
                    disjuncts = (disjunctLists[positions[i]] = new ArrayList<>(termArray.length));
                    ++distinctPositions;
                }
                for (Term aTermArray : termArray) {
                    disjuncts.add(new SpanTermQuery(aTermArray));
                }
            }
            int positionGaps = 0;
            int position = 0;
            final SpanQuery[] clauses = new SpanQuery[distinctPositions];
            for (List<SpanQuery> disjuncts : disjunctLists) {
                if (disjuncts != null) {
                    clauses[position++] = new SpanOrQuery(disjuncts.toArray(new SpanQuery[disjuncts.size()]));
                } else {
                    ++positionGaps;
                }
            }
            if (clauses.length == 1) {
                extractWeightedSpanTerms(terms, clauses[0], boost);
            } else {
                final int slop = mpq.getSlop();
                final boolean inorder = (slop == 0);
                SpanNearQuery sp = new SpanNearQuery(clauses, slop + positionGaps, inorder);
                extractWeightedSpanTerms(terms, sp, boost);
            }
        }
    } else if (query instanceof MatchAllDocsQuery) {
    //nothing
    } else if (query instanceof CustomScoreQuery) {
        extract(((CustomScoreQuery) query).getSubQuery(), boost, terms);
    } else if (isQueryUnsupported(query.getClass())) {
    // nothing
    } else {
        if (query instanceof MultiTermQuery && (!expandMultiTermQuery || !fieldNameComparator(((MultiTermQuery) query).getField()))) {
            return;
        }
        Query origQuery = query;
        final IndexReader reader = getLeafContext().reader();
        Query rewritten;
        if (query instanceof MultiTermQuery) {
            rewritten = MultiTermQuery.SCORING_BOOLEAN_REWRITE.rewrite(reader, (MultiTermQuery) query);
        } else {
            rewritten = origQuery.rewrite(reader);
        }
        if (rewritten != origQuery) {
            // only rewrite once and then flatten again - the rewritten query could have a special treatment
            // if this method is overwritten in a subclass or above in the next recursion
            extract(rewritten, boost, terms);
        } else {
            extractUnknownQuery(query, terms);
        }
    }
}

Example 48 with BoostQuery

use of org.apache.lucene.search.BoostQuery in project lucene-solr by apache.

the class FieldQuery method flatten.

void flatten(Query sourceQuery, IndexReader reader, Collection<Query> flatQueries, float boost) throws IOException {
    while (sourceQuery instanceof BoostQuery) {
        BoostQuery bq = (BoostQuery) sourceQuery;
        sourceQuery = bq.getQuery();
        boost *= bq.getBoost();
    }
    if (sourceQuery instanceof BooleanQuery) {
        BooleanQuery bq = (BooleanQuery) sourceQuery;
        for (BooleanClause clause : bq) {
            if (!clause.isProhibited()) {
                flatten(clause.getQuery(), reader, flatQueries, boost);
            }
        }
    } else if (sourceQuery instanceof DisjunctionMaxQuery) {
        DisjunctionMaxQuery dmq = (DisjunctionMaxQuery) sourceQuery;
        for (Query query : dmq) {
            flatten(query, reader, flatQueries, boost);
        }
    } else if (sourceQuery instanceof TermQuery) {
        if (boost != 1f) {
            sourceQuery = new BoostQuery(sourceQuery, boost);
        }
        if (!flatQueries.contains(sourceQuery))
            flatQueries.add(sourceQuery);
    } else if (sourceQuery instanceof SynonymQuery) {
        SynonymQuery synQuery = (SynonymQuery) sourceQuery;
        for (Term term : synQuery.getTerms()) {
            flatten(new TermQuery(term), reader, flatQueries, boost);
        }
    } else if (sourceQuery instanceof PhraseQuery) {
        PhraseQuery pq = (PhraseQuery) sourceQuery;
        if (pq.getTerms().length == 1)
            sourceQuery = new TermQuery(pq.getTerms()[0]);
        if (boost != 1f) {
            sourceQuery = new BoostQuery(sourceQuery, boost);
        }
        flatQueries.add(sourceQuery);
    } else if (sourceQuery instanceof ConstantScoreQuery) {
        final Query q = ((ConstantScoreQuery) sourceQuery).getQuery();
        if (q != null) {
            flatten(q, reader, flatQueries, boost);
        }
    } else if (sourceQuery instanceof CustomScoreQuery) {
        final Query q = ((CustomScoreQuery) sourceQuery).getSubQuery();
        if (q != null) {
            flatten(q, reader, flatQueries, boost);
        }
    } else if (sourceQuery instanceof ToParentBlockJoinQuery) {
        Query childQuery = ((ToParentBlockJoinQuery) sourceQuery).getChildQuery();
        if (childQuery != null) {
            flatten(childQuery, reader, flatQueries, boost);
        }
    } else if (reader != null) {
        Query query = sourceQuery;
        Query rewritten;
        if (sourceQuery instanceof MultiTermQuery) {
            rewritten = new MultiTermQuery.TopTermsScoringBooleanQueryRewrite(MAX_MTQ_TERMS).rewrite(reader, (MultiTermQuery) query);
        } else {
            rewritten = query.rewrite(reader);
        }
        if (rewritten != query) {
            // only rewrite once and then flatten again - the rewritten query could have a speacial treatment
            // if this method is overwritten in a subclass.
            flatten(rewritten, reader, flatQueries, boost);
        }
    // if the query is already rewritten we discard it
    }
// else discard queries
}

Example 49 with BoostQuery

use of org.apache.lucene.search.BoostQuery in project lucene-solr by apache.

the class FieldQuery method checkOverlap.

/*
   * Check if src and dest have overlapped part and if it is, create PhraseQueries and add expandQueries.
   * 
   * ex1) src="a b", dest="c d"       => no overlap
   * ex2) src="a b", dest="a b c"     => no overlap
   * ex3) src="a b", dest="b c"       => overlap; expandQueries={"a b c"}
   * ex4) src="a b c", dest="b c d"   => overlap; expandQueries={"a b c d"}
   * ex5) src="a b c", dest="b c"     => no overlap
   * ex6) src="a b c", dest="b"       => no overlap
   * ex7) src="a a a a", dest="a a a" => overlap;
   *                                     expandQueries={"a a a a a","a a a a a a"}
   * ex8) src="a b c d", dest="b c"   => no overlap
   */
private void checkOverlap(Collection<Query> expandQueries, Term[] src, Term[] dest, int slop, float boost) {
    // converts PhraseQuery to TermQuery)
    for (int i = 1; i < src.length; i++) {
        boolean overlap = true;
        for (int j = i; j < src.length; j++) {
            if ((j - i) < dest.length && !src[j].text().equals(dest[j - i].text())) {
                overlap = false;
                break;
            }
        }
        if (overlap && src.length - i < dest.length) {
            PhraseQuery.Builder pqBuilder = new PhraseQuery.Builder();
            for (Term srcTerm : src) pqBuilder.add(srcTerm);
            for (int k = src.length - i; k < dest.length; k++) {
                pqBuilder.add(new Term(src[0].field(), dest[k].text()));
            }
            pqBuilder.setSlop(slop);
            Query pq = pqBuilder.build();
            if (boost != 1f) {
                pq = new BoostQuery(pq, 1f);
            }
            if (!expandQueries.contains(pq))
                expandQueries.add(pq);
        }
    }
}

Example 50 with BoostQuery

use of org.apache.lucene.search.BoostQuery in project lucene-solr by apache.

the class FieldQuery method expand.

/*
   * Create expandQueries from flatQueries.
   * 
   * expandQueries := flatQueries + overlapped phrase queries
   * 
   * ex1) flatQueries={a,b,c}
   *      => expandQueries={a,b,c}
   * ex2) flatQueries={a,"b c","c d"}
   *      => expandQueries={a,"b c","c d","b c d"}
   */
Collection<Query> expand(Collection<Query> flatQueries) {
    Set<Query> expandQueries = new LinkedHashSet<>();
    for (Iterator<Query> i = flatQueries.iterator(); i.hasNext(); ) {
        Query query = i.next();
        i.remove();
        expandQueries.add(query);
        float queryBoost = 1f;
        while (query instanceof BoostQuery) {
            BoostQuery bq = (BoostQuery) query;
            queryBoost *= bq.getBoost();
            query = bq.getQuery();
        }
        if (!(query instanceof PhraseQuery))
            continue;
        for (Iterator<Query> j = flatQueries.iterator(); j.hasNext(); ) {
            Query qj = j.next();
            float qjBoost = 1f;
            while (qj instanceof BoostQuery) {
                BoostQuery bq = (BoostQuery) qj;
                qjBoost *= bq.getBoost();
                qj = bq.getQuery();
            }
            if (!(qj instanceof PhraseQuery))
                continue;
            checkOverlap(expandQueries, (PhraseQuery) query, queryBoost, (PhraseQuery) qj, qjBoost);
        }
    }
    return expandQueries;
}