Example usage for org.apache.lucene.index DocValues emptySortedNumeric

Introduction

In this page you can find the example usage for org.apache.lucene.index DocValues emptySortedNumeric.

Prototype

public static final SortedNumericDocValues emptySortedNumeric(int maxDoc) 

Source Link

Document

An empty SortedNumericDocValues which returns zero values for every document

Usage

From source file:org.codelibs.elasticsearch.search.MultiValueMode.java

License:Apache License

/**
 * Return a {NumericDocValues} instance that can be used to sort root documents
 * with this mode, the provided values and filters for root/inner documents.
 *
 * For every root document, the values of its inner documents will be aggregated.
 * If none of the inner documents has a value, then <code>missingValue</code> is returned.
 *
 * Allowed Modes: SUM, AVG, MIN, MAX/*from   w  ww .  j  ava  2  s .  c  o m*/
 *
 * NOTE: Calling the returned instance on docs that are not root docs is illegal
 *       The returned instance can only be evaluate the current and upcoming docs
 */
public NumericDocValues select(final SortedNumericDocValues values, final long missingValue,
        final BitSet rootDocs, final DocIdSetIterator innerDocs, int maxDoc) throws IOException {
    if (rootDocs == null || innerDocs == null) {
        return select(DocValues.emptySortedNumeric(maxDoc), missingValue);
    }

    return new NumericDocValues() {

        int lastSeenRootDoc = 0;
        long lastEmittedValue = missingValue;

        @Override
        public long get(int rootDoc) {
            assert rootDocs.get(rootDoc) : "can only sort root documents";
            assert rootDoc >= lastSeenRootDoc : "can only evaluate current and upcoming root docs";
            if (rootDoc == lastSeenRootDoc) {
                return lastEmittedValue;
            }
            try {
                final int prevRootDoc = rootDocs.prevSetBit(rootDoc - 1);
                final int firstNestedDoc;
                if (innerDocs.docID() > prevRootDoc) {
                    firstNestedDoc = innerDocs.docID();
                } else {
                    firstNestedDoc = innerDocs.advance(prevRootDoc + 1);
                }

                lastSeenRootDoc = rootDoc;
                lastEmittedValue = pick(values, missingValue, innerDocs, firstNestedDoc, rootDoc);
                return lastEmittedValue;
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
    };
}

---

From source file:org.elasticsearch.index.fielddata.plain.AtomicLongFieldData.java

License:Apache License

public static AtomicNumericFieldData empty(final int maxDoc) {
    return new AtomicLongFieldData(0) {

        @Override/*from w ww.  ja  va  2s.  c  o  m*/
        public SortedNumericDocValues getLongValues() {
            return DocValues.emptySortedNumeric(maxDoc);
        }

        @Override
        public Collection<Accountable> getChildResources() {
            return Collections.emptyList();
        }

    };
}

---

From source file:org.neo4j.kernel.api.impl.index.IndexReaderStub.java

License:Open Source License

@Override
public SortedNumericDocValues getSortedNumericDocValues(String field) throws IOException {
    return DocValues.emptySortedNumeric(elements.length);
}

---