Package org.apache.lucene.search

Examples of org.apache.lucene.search.DocIdSetIterator

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        @Override
        public final int advance(int target) throws IOException {

            if (lastReturn == DocIdSetIterator.NO_MORE_DOCS) return DocIdSetIterator.NO_MORE_DOCS;

            DocIdSetIterator dcit = iterators[0];
            target = dcit.advance(target);
            int size = iterators.length;
            int skip = 0;
            int i = 1;
            while (i < size) {
                if (i != skip) {
                    dcit = iterators[i];
                    int docid = dcit.advance(target);
                    if (docid > target) {
                        target = docid;
                        if (i != 0) {
                            skip = i;
                            i = 0;
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        } else if (docIdSet instanceof DocSet) {
            return (DocSet) docIdSet;
        } else if (docIdSet instanceof OpenBitSet) {
            return new OpenBitDocSet((OpenBitSet) docIdSet);
        } else {
            final DocIdSetIterator it = docIdSet.iterator();
            // null is allowed to be returned by iterator(),
            // in this case we wrap with the empty set,
            // which is cacheable.
            return (it == null) ? DocSet.EMPTY_DOC_SET : new OpenBitDocSet(it, reader.maxDoc());
        }
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        } else if (docIdSet.isCacheable() && (docIdSet instanceof DocSet)) {
            return (DocSet) docIdSet;
        } else if (docIdSet instanceof OpenBitSet) {
            return new OpenBitDocSet((OpenBitSet) docIdSet);
        } else {
            final DocIdSetIterator it = docIdSet.iterator();
            // null is allowed to be returned by iterator(),
            // in this case we wrap with the empty set,
            // which is cacheable.
            return (it == null) ? DocSet.EMPTY_DOC_SET : new OpenBitDocSet(it, reader.maxDoc());
        }
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            for (DocIdSet set : sets) {
                if (set == null) {
                    lastReturn = DocIdSetIterator.NO_MORE_DOCS; // non matching
                    break;
                } else {
                    DocIdSetIterator dcit = set.iterator();
                    if (dcit == null) {
                        lastReturn = DocIdSetIterator.NO_MORE_DOCS; // non matching
                        break;
                    }
                    iterators[j++] = dcit;
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        @Override
        public final int nextDoc() throws IOException {

            if (lastReturn == DocIdSetIterator.NO_MORE_DOCS) return DocIdSetIterator.NO_MORE_DOCS;

            DocIdSetIterator dcit = iterators[0];
            int target = dcit.nextDoc();
            int size = iterators.length;
            int skip = 0;
            int i = 1;
            while (i < size) {
                if (i != skip) {
                    dcit = iterators[i];
                    int docid = dcit.advance(target);
                    if (docid > target) {
                        target = docid;
                        if (i != 0) {
                            skip = i;
                            i = 0;
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        @Override
        public final int advance(int target) throws IOException {

            if (lastReturn == DocIdSetIterator.NO_MORE_DOCS) return DocIdSetIterator.NO_MORE_DOCS;

            DocIdSetIterator dcit = iterators[0];
            target = dcit.advance(target);
            int size = iterators.length;
            int skip = 0;
            int i = 1;
            while (i < size) {
                if (i != skip) {
                    dcit = iterators[i];
                    int docid = dcit.advance(target);
                    if (docid > target) {
                        target = docid;
                        if (i != 0) {
                            skip = i;
                            i = 0;
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        OrDocIdSetIterator() throws IOException {
            _curDoc = -1;
            _heap = new Item[sets.size()];
            _size = 0;
            for (DocIdSet set : sets) {
                DocIdSetIterator iterator = set.iterator();
                if (iterator != null) {
                    _heap[_size++] = new Item(iterator);
                }
            }
            if (_size == 0) _curDoc = DocIdSetIterator.NO_MORE_DOCS;
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        public final int nextDoc() throws IOException {
            if (_curDoc == DocIdSetIterator.NO_MORE_DOCS) return DocIdSetIterator.NO_MORE_DOCS;

            Item top = _heap[0];
            while (true) {
                DocIdSetIterator topIter = top.iter;
                int docid;
                if ((docid = topIter.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
                    top.doc = docid;
                    heapAdjust();
                } else {
                    heapRemoveRoot();
                    if (_size == 0) return (_curDoc = DocIdSetIterator.NO_MORE_DOCS);
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            if (target <= _curDoc) target = _curDoc + 1;

            Item top = _heap[0];
            while (true) {
                DocIdSetIterator topIter = top.iter;
                int docid;
                if ((docid = topIter.advance(target)) != DocIdSetIterator.NO_MORE_DOCS) {
                    top.doc = docid;
                    heapAdjust();
                } else {
                    heapRemoveRoot();
                    if (_size == 0) return (_curDoc = DocIdSetIterator.NO_MORE_DOCS);
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    @Override public long sizeInBytes() {
        return 0;
    }

    @Override public DocIdSetIterator iterator() throws IOException {
        return new DocIdSetIterator() {
            private int doc = -1;

            @Override public int docID() {
                return doc;
            }
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