Examples with StatsValues org.apache.solr.handler.component.StatsValues used on opensource projects

Example 1 with StatsValues

use of org.apache.solr.handler.component.StatsValues in project lucene-solr by apache.

the class DocValuesStats method getCounts.

public static StatsValues getCounts(SolrIndexSearcher searcher, StatsField statsField, DocSet docs, String[] facet) throws IOException {
    final SchemaField schemaField = statsField.getSchemaField();
    assert null != statsField.getSchemaField() : "DocValuesStats requires a StatsField using a SchemaField";
    final String fieldName = schemaField.getName();
    final FieldType ft = schemaField.getType();
    final StatsValues res = StatsValuesFactory.createStatsValues(statsField);
    //Initialize facetstats, if facets have been passed in
    final FieldFacetStats[] facetStats = new FieldFacetStats[facet.length];
    int upto = 0;
    for (String facetField : facet) {
        SchemaField fsf = searcher.getSchema().getField(facetField);
        if (fsf.multiValued()) {
            throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "Stats can only facet on single-valued fields, not: " + facetField);
        }
        SchemaField facetSchemaField = searcher.getSchema().getField(facetField);
        facetStats[upto++] = new FieldFacetStats(searcher, facetSchemaField, statsField);
    }
    // TODO: remove multiValuedFieldCache(), check dv type / uninversion type?
    final boolean multiValued = schemaField.multiValued() || ft.multiValuedFieldCache();
    // for term lookups only
    SortedSetDocValues si;
    // for mapping per-segment ords to global ones
    OrdinalMap ordinalMap = null;
    if (multiValued) {
        si = searcher.getSlowAtomicReader().getSortedSetDocValues(fieldName);
        if (si instanceof MultiSortedSetDocValues) {
            ordinalMap = ((MultiDocValues.MultiSortedSetDocValues) si).mapping;
        }
    } else {
        SortedDocValues single = searcher.getSlowAtomicReader().getSortedDocValues(fieldName);
        si = single == null ? null : DocValues.singleton(single);
        if (single instanceof MultiDocValues.MultiSortedDocValues) {
            ordinalMap = ((MultiDocValues.MultiSortedDocValues) single).mapping;
        }
    }
    if (si == null) {
        si = DocValues.emptySortedSet();
    }
    if (si.getValueCount() >= Integer.MAX_VALUE) {
        throw new UnsupportedOperationException("Currently this stats method is limited to " + Integer.MAX_VALUE + " unique terms");
    }
    int missingDocCountTotal = 0;
    final int nTerms = (int) si.getValueCount();
    // count collection array only needs to be as big as the number of terms we are
    // going to collect counts for.
    final int[] counts = new int[nTerms];
    Filter filter = docs.getTopFilter();
    List<LeafReaderContext> leaves = searcher.getTopReaderContext().leaves();
    for (int subIndex = 0; subIndex < leaves.size(); subIndex++) {
        LeafReaderContext leaf = leaves.get(subIndex);
        // solr docsets already exclude any deleted docs
        DocIdSet dis = filter.getDocIdSet(leaf, null);
        DocIdSetIterator disi = null;
        if (dis != null) {
            disi = dis.iterator();
        }
        if (disi != null) {
            int docBase = leaf.docBase;
            if (multiValued) {
                SortedSetDocValues sub = leaf.reader().getSortedSetDocValues(fieldName);
                if (sub == null) {
                    sub = DocValues.emptySortedSet();
                }
                SortedDocValues singleton = DocValues.unwrapSingleton(sub);
                if (singleton != null) {
                    // some codecs may optimize SORTED_SET storage for single-valued fields
                    missingDocCountTotal += accumSingle(counts, docBase, facetStats, singleton, disi, subIndex, ordinalMap);
                } else {
                    missingDocCountTotal += accumMulti(counts, docBase, facetStats, sub, disi, subIndex, ordinalMap);
                }
            } else {
                SortedDocValues sub = leaf.reader().getSortedDocValues(fieldName);
                if (sub == null) {
                    sub = DocValues.emptySorted();
                }
                missingDocCountTotal += accumSingle(counts, docBase, facetStats, sub, disi, subIndex, ordinalMap);
            }
        }
    }
    // add results in index order
    for (int ord = 0; ord < counts.length; ord++) {
        int count = counts[ord];
        if (count > 0) {
            final BytesRef value = si.lookupOrd(ord);
            res.accumulate(value, count);
            for (FieldFacetStats f : facetStats) {
                f.accumulateTermNum(ord, value);
            }
        }
    }
    res.addMissing(missingDocCountTotal);
    if (facetStats.length > 0) {
        for (FieldFacetStats f : facetStats) {
            Map<String, StatsValues> facetStatsValues = f.facetStatsValues;
            f.accumulateMissing();
            res.addFacet(f.name, facetStatsValues);
        }
    }
    return res;
}