Examples with ToChildBlockJoinQuery org.apache.lucene.search.join.ToChildBlockJoinQuery used on opensource projects

Example 1 with ToChildBlockJoinQuery

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

the class ChildDocTransformer method transform.

@Override
public void transform(SolrDocument doc, int docid, float score) {
    FieldType idFt = idField.getType();
    Object parentIdField = doc.getFirstValue(idField.getName());
    String parentIdExt = parentIdField instanceof IndexableField ? idFt.toExternal((IndexableField) parentIdField) : parentIdField.toString();
    try {
        Query parentQuery = idFt.getFieldQuery(null, idField, parentIdExt);
        Query query = new ToChildBlockJoinQuery(parentQuery, parentsFilter);
        DocList children = context.getSearcher().getDocList(query, childFilterQuery, new Sort(), 0, limit);
        if (children.matches() > 0) {
            DocIterator i = children.iterator();
            while (i.hasNext()) {
                Integer childDocNum = i.next();
                Document childDoc = context.getSearcher().doc(childDocNum);
                SolrDocument solrChildDoc = DocsStreamer.convertLuceneDocToSolrDoc(childDoc, schema);
                // TODO: future enhancement...
                // support an fl local param in the transformer, which is used to build
                // a private ReturnFields instance that we use to prune unwanted field 
                // names from solrChildDoc
                doc.addChildDocument(solrChildDoc);
            }
        }
    } catch (IOException e) {
        doc.put(name, "Could not fetch child Documents");
    }
}

Example 2 with ToChildBlockJoinQuery

use of org.apache.lucene.search.join.ToChildBlockJoinQuery 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 3 with ToChildBlockJoinQuery

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

the class SynonymTokenizer method testToChildBlockJoinQuery.

public void testToChildBlockJoinQuery() throws Exception {
    BitSetProducer parentFilter = new QueryBitSetProducer(new TermQuery(new Term(FIELD_NAME, "parent")));
    BooleanQuery.Builder booleanQuery = new BooleanQuery.Builder();
    booleanQuery.add(new ToChildBlockJoinQuery(new TermQuery(new Term(FIELD_NAME, "parent")), parentFilter), Occur.MUST);
    booleanQuery.add(new TermQuery(new Term(FIELD_NAME, "child")), Occur.MUST);
    query = booleanQuery.build();
    searcher = newSearcher(reader);
    hits = searcher.search(query, 100);
    int maxNumFragmentsRequired = 2;
    QueryScorer scorer = new QueryScorer(query, FIELD_NAME);
    Highlighter highlighter = new Highlighter(this, scorer);
    for (int i = 0; i < hits.totalHits; i++) {
        String text = "parent document";
        final int docId = hits.scoreDocs[i].doc;
        TokenStream tokenStream = getAnyTokenStream(FIELD_NAME, docId);
        highlighter.setTextFragmenter(new SimpleFragmenter(40));
        highlighter.getBestFragments(tokenStream, text, maxNumFragmentsRequired, "...");
    }
    assertTrue("Failed to find correct number of highlights " + numHighlights + " found", numHighlights == 1);
}