## Uses of Class
org.apache.lucene.search.DocIdSetIterator

- Packages that use DocIdSetIterator
  Package | Description
  --- | ---
  org.apache.lucene.index | Code to maintain and access indices.
  org.apache.lucene.search | Code to search indices.
  org.apache.lucene.search.spans | The calculus of spans.
  org.apache.lucene.util | Some utility classes.

- - ### Uses of DocIdSetIterator in org.apache.lucene.index

    Subclasses of DocIdSetIterator in org.apache.lucene.index
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `FilterLeafReader.FilterPostingsEnum` Base class for filtering `PostingsEnum` implementations.
    `class` | `MultiPostingsEnum` Exposes `PostingsEnum`, merged from `PostingsEnum` API of sub-segments.
    `class` | `PostingsEnum` Iterates through the postings.

  - ### Uses of DocIdSetIterator in org.apache.lucene.search

    Subclasses of DocIdSetIterator in org.apache.lucene.search
    Modifier and Type | Class and Description
    --- | ---
    `class` | `ConjunctionDISI` A conjunction of DocIdSetIterators.
    `class` | `DisjunctionDISIApproximation` A `DocIdSetIterator` which is a disjunction of the approximations of the provided iterators.
    `class` | `FilteredDocIdSetIterator` Abstract decorator class of a DocIdSetIterator implementation that provides on-demand filter/validation mechanism on an underlying DocIdSetIterator.

    Fields in org.apache.lucene.search declared as DocIdSetIterator
    Modifier and Type | Field and Description
    --- | ---
    `protected DocIdSetIterator` | FilteredDocIdSetIterator.`_innerIter`
    `DocIdSetIterator` | DisiWrapper.`approximation`
    `protected DocIdSetIterator` | TwoPhaseIterator.`approximation`
    `DocIdSetIterator` | DisiWrapper.`iterator`

    Methods in org.apache.lucene.search that return DocIdSetIterator
    Modifier and Type | Method and Description
    --- | ---
    `static DocIdSetIterator` | DocIdSetIterator.`all(int maxDoc)` A `DocIdSetIterator` that matches all documents up to `maxDoc - 1`.
    `DocIdSetIterator` | TwoPhaseIterator.`approximation()` Return an approximation.
    `static DocIdSetIterator` | TwoPhaseIterator.`asDocIdSetIterator(TwoPhaseIterator twoPhaseIterator)` Return a `DocIdSetIterator` view of the provided `TwoPhaseIterator`.
    `static DocIdSetIterator` | DocIdSetIterator.`empty()` An empty `DocIdSetIterator` instance
    `DocIdSetIterator` | FilteredDocIdSetIterator.`getDelegate()` Return the wrapped `DocIdSetIterator`.
    `static DocIdSetIterator` | ConjunctionDISI.`intersectIterators(List<DocIdSetIterator> iterators)` Create a conjunction over the provided DocIdSetIterators.
    `static DocIdSetIterator` | ConjunctionDISI.`intersectScorers(Collection<Scorer> scorers)` Create a conjunction over the provided `Scorer`s.
    `static DocIdSetIterator` | ConjunctionDISI.`intersectSpans(List<Spans> spanList)` Create a conjunction over the provided `Spans`.
    `abstract DocIdSetIterator` | Scorer.`iterator()` Return a `DocIdSetIterator` over matching documents.
    `abstract DocIdSetIterator` | DocIdSet.`iterator()` Provides a `DocIdSetIterator` to access the set.
    `DocIdSetIterator` | DocValuesDocIdSet.`iterator()`
    `DocIdSetIterator` | ConstantScoreScorer.`iterator()`
    `DocIdSetIterator` | FilterScorer.`iterator()`

    Methods in org.apache.lucene.search with parameters of type DocIdSetIterator
    Modifier and Type | Method and Description
    --- | ---
    `static TwoPhaseIterator` | TwoPhaseIterator.`unwrap(DocIdSetIterator iterator)` If the given `DocIdSetIterator` has been created with `TwoPhaseIterator.asDocIdSetIterator(org.apache.lucene.search.TwoPhaseIterator)`, then this will return the wrapped `TwoPhaseIterator`.

    Method parameters in org.apache.lucene.search with type arguments of type DocIdSetIterator
    Modifier and Type | Method and Description
    --- | ---
    `static DocIdSetIterator` | ConjunctionDISI.`intersectIterators(List<DocIdSetIterator> iterators)` Create a conjunction over the provided DocIdSetIterators.

    Constructors in org.apache.lucene.search with parameters of type DocIdSetIterator
    Constructor and Description
    `ConstantScoreScorer(Weight weight, float score, DocIdSetIterator disi)` Constructor based on a `DocIdSetIterator` which will be used to drive iteration.
    `FilteredDocIdSetIterator(DocIdSetIterator innerIter)` Constructor.
    `TwoPhaseIterator(DocIdSetIterator approximation)` Takes the approximation to be returned by `TwoPhaseIterator.approximation`.

  - ### Uses of DocIdSetIterator in org.apache.lucene.search.spans

    Subclasses of DocIdSetIterator in org.apache.lucene.search.spans
    Modifier and Type | Class and Description
    --- | ---
    `class` | `FilterSpans` A `Spans` implementation wrapping another spans instance, allowing to filter spans matches easily by implementing `FilterSpans.accept(org.apache.lucene.search.spans.Spans)`
    `class` | `NearSpansOrdered` A Spans that is formed from the ordered subspans of a SpanNearQuery where the subspans do not overlap and have a maximum slop between them.
    `class` | `NearSpansUnordered` Similar to `NearSpansOrdered`, but for the unordered case.
    `class` | `Spans` Iterates through combinations of start/end positions per-doc.
    `class` | `TermSpans` Expert: Public for extension only.

    Methods in org.apache.lucene.search.spans that return DocIdSetIterator
    Modifier and Type | Method and Description
    --- | ---
    `DocIdSetIterator` | SpanScorer.`iterator()`

  - ### Uses of DocIdSetIterator in org.apache.lucene.util

    Subclasses of DocIdSetIterator in org.apache.lucene.util
    Modifier and Type | Class and Description
    --- | ---
    `class` | `BitSetIterator` A `DocIdSetIterator` which iterates over set bits in a bit set.

    Methods in org.apache.lucene.util that return DocIdSetIterator
    Modifier and Type | Method and Description
    --- | ---
    `DocIdSetIterator` | BitDocIdSet.`iterator()`
    `DocIdSetIterator` | NotDocIdSet.`iterator()`
    `DocIdSetIterator` | RoaringDocIdSet.`iterator()`

    Methods in org.apache.lucene.util with parameters of type DocIdSetIterator
    Modifier and Type | Method and Description
    --- | ---
    `RoaringDocIdSet.Builder` | RoaringDocIdSet.Builder.`add(DocIdSetIterator disi)` Add the content of the provided `DocIdSetIterator`.
    `void` | DocIdSetBuilder.`add(DocIdSetIterator iter)` Add the content of the provided `DocIdSetIterator` to this builder.
    `protected void` | BitSet.`assertUnpositioned(DocIdSetIterator iter)` Assert that the current doc is -1.
    `static FixedBitSet` | BitSetIterator.`getFixedBitSetOrNull(DocIdSetIterator iterator)` If the provided iterator wraps a `FixedBitSet`, returns it, otherwise returns null.
    `static SparseFixedBitSet` | BitSetIterator.`getSparseFixedBitSetOrNull(DocIdSetIterator iterator)` If the provided iterator wraps a `SparseFixedBitSet`, returns it, otherwise returns null.
    `static BitSet` | BitSet.`of(DocIdSetIterator it, int maxDoc)` Build a `BitSet` from the content of the provided `DocIdSetIterator`.
    `void` | BitSet.`or(DocIdSetIterator iter)` Does in-place OR of the bits provided by the iterator.
    `void` | SparseFixedBitSet.`or(DocIdSetIterator it)`
    `void` | FixedBitSet.`or(DocIdSetIterator iter)`
    `void` | FixedBitSet.`xor(DocIdSetIterator iter)` Does in-place XOR of the bits provided by the iterator.

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