Java 类org.apache.lucene.util.BitDocIdSet 实例源码

/**
 * Return the {@link DocIdSet} representing the documents of the
 * virtual collection to be used in searches.
 * This will respect deleted documents.
 * 
 * @param atomic
 *            The {@link LeafReaderContext} to search in.
 * @param accepted
 *            {@link Bits} vector of accepted documents.
 * @throws IOException
 */
public DocIdSet getDocIdSet (LeafReaderContext atomic, Bits acceptDocs)
        throws IOException {

    int maxDoc = atomic.reader().maxDoc();
    FixedBitSet bitset = new FixedBitSet(maxDoc);

    Filter filter;
    if (this.cbi == null || (filter = this.cbi.toFilter()) == null) {
        if (acceptDocs == null)
            return null;

        bitset.set(0, maxDoc);
    }
    else {

        // Init vector
        DocIdSet docids = filter.getDocIdSet(atomic, null);
        DocIdSetIterator filterIter = (docids == null) ? null
                : docids.iterator();

        if (filterIter == null) {
            if (!this.cbi.isNegative())
                return null;

            bitset.set(0, maxDoc);
        }
        else {
            // Or bit set
            bitset.or(filterIter);

            // Revert for negation
            if (this.cbi.isNegative())
                bitset.flip(0, maxDoc);
        };
    };

    if (DEBUG) {
        log.debug("Bit set is  {}", _bits(bitset));
        log.debug("Livedocs is {}", _bits(acceptDocs));
    };

    // Remove deleted docs
    return (DocIdSet) BitsFilteredDocIdSet
            .wrap((DocIdSet) new BitDocIdSet(bitset), acceptDocs);
}