Package org.apache.lucene.search.join
Class ToParentDocValues.SortedDVs
- java.lang.Object
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- org.apache.lucene.search.DocIdSetIterator
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- org.apache.lucene.index.DocValuesIterator
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- org.apache.lucene.index.BinaryDocValues
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- org.apache.lucene.index.SortedDocValues
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- org.apache.lucene.search.join.ToParentDocValues.SortedDVs
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- All Implemented Interfaces:
ToParentDocValues.Accumulator
- Enclosing class:
- ToParentDocValues
private static final class ToParentDocValues.SortedDVs extends SortedDocValues implements ToParentDocValues.Accumulator
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Field Summary
Fields Modifier and Type Field Description private ToParentDocValues
iter
private int
ord
private BlockJoinSelector.Type
selection
private SortedDocValues
values
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Fields inherited from class org.apache.lucene.search.DocIdSetIterator
NO_MORE_DOCS
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Constructor Summary
Constructors Modifier Constructor Description private
SortedDVs(SortedDocValues values, BlockJoinSelector.Type selection, BitSet parents, DocIdSetIterator children)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
advance(int target)
Advances to the first beyond the current whose document number is greater than or equal to target, and returns the document number itself.boolean
advanceExact(int targetParentDocID)
Advance the iterator to exactlytarget
and return whethertarget
has a value.long
cost()
Returns the estimated cost of thisDocIdSetIterator
.int
docID()
Returns the following:-1
ifDocIdSetIterator.nextDoc()
orDocIdSetIterator.advance(int)
were not called yet.int
getValueCount()
Returns the number of unique values.void
increment()
BytesRef
lookupOrd(int ord)
Retrieves the value for the specified ordinal.int
nextDoc()
Advances to the next document in the set and returns the doc it is currently on, orDocIdSetIterator.NO_MORE_DOCS
if there are no more docs in the set.
NOTE: after the iterator has exhausted you should not call this method, as it may result in unpredicted behavior.int
ordValue()
Returns the ordinal for the current docID.void
reset()
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Methods inherited from class org.apache.lucene.index.SortedDocValues
binaryValue, intersect, lookupTerm, termsEnum
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Methods inherited from class org.apache.lucene.search.DocIdSetIterator
all, empty, range, slowAdvance
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Field Detail
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values
private final SortedDocValues values
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selection
private final BlockJoinSelector.Type selection
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ord
private int ord
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iter
private final ToParentDocValues iter
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Constructor Detail
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SortedDVs
private SortedDVs(SortedDocValues values, BlockJoinSelector.Type selection, BitSet parents, DocIdSetIterator children)
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Method Detail
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docID
public int docID()
Description copied from class:DocIdSetIterator
Returns the following:-1
ifDocIdSetIterator.nextDoc()
orDocIdSetIterator.advance(int)
were not called yet.DocIdSetIterator.NO_MORE_DOCS
if the iterator has exhausted.- Otherwise it should return the doc ID it is currently on.
- Specified by:
docID
in classDocIdSetIterator
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reset
public void reset() throws java.io.IOException
- Specified by:
reset
in interfaceToParentDocValues.Accumulator
- Throws:
java.io.IOException
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increment
public void increment() throws java.io.IOException
- Specified by:
increment
in interfaceToParentDocValues.Accumulator
- Throws:
java.io.IOException
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nextDoc
public int nextDoc() throws java.io.IOException
Description copied from class:DocIdSetIterator
Advances to the next document in the set and returns the doc it is currently on, orDocIdSetIterator.NO_MORE_DOCS
if there are no more docs in the set.
NOTE: after the iterator has exhausted you should not call this method, as it may result in unpredicted behavior.- Specified by:
nextDoc
in classDocIdSetIterator
- Throws:
java.io.IOException
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advance
public int advance(int target) throws java.io.IOException
Description copied from class:DocIdSetIterator
Advances to the first beyond the current whose document number is greater than or equal to target, and returns the document number itself. Exhausts the iterator and returnsDocIdSetIterator.NO_MORE_DOCS
if target is greater than the highest document number in the set.The behavior of this method is undefined when called with
target ≤ current
, or after the iterator has exhausted. Both cases may result in unpredicted behavior.When
target > current
it behaves as if written:int advance(int target) { int doc; while ((doc = nextDoc()) < target) { } return doc; }
Some implementations are considerably more efficient than that.NOTE: this method may be called with
DocIdSetIterator.NO_MORE_DOCS
for efficiency by some Scorers. If your implementation cannot efficiently determine that it should exhaust, it is recommended that you check for that value in each call to this method.- Specified by:
advance
in classDocIdSetIterator
- Throws:
java.io.IOException
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advanceExact
public boolean advanceExact(int targetParentDocID) throws java.io.IOException
Description copied from class:DocValuesIterator
Advance the iterator to exactlytarget
and return whethertarget
has a value.target
must be greater than or equal to the currentdoc ID
and must be a valid doc ID, ie. ≥ 0 and <maxDoc
. After this method returns,DocIdSetIterator.docID()
returnstarget
.- Specified by:
advanceExact
in classDocValuesIterator
- Throws:
java.io.IOException
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ordValue
public int ordValue()
Description copied from class:SortedDocValues
Returns the ordinal for the current docID. It is illegal to call this method afterDocValuesIterator.advanceExact(int)
returnedfalse
.- Specified by:
ordValue
in classSortedDocValues
- Returns:
- ordinal for the document: this is dense, starts at 0, then increments by 1 for the next value in sorted order.
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lookupOrd
public BytesRef lookupOrd(int ord) throws java.io.IOException
Description copied from class:SortedDocValues
Retrieves the value for the specified ordinal. The returnedBytesRef
may be re-used across calls toSortedDocValues.lookupOrd(int)
so make sure tocopy it
if you want to keep it around.- Specified by:
lookupOrd
in classSortedDocValues
- Parameters:
ord
- ordinal to lookup (must be >= 0 and <SortedDocValues.getValueCount()
)- Throws:
java.io.IOException
- See Also:
SortedDocValues.ordValue()
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getValueCount
public int getValueCount()
Description copied from class:SortedDocValues
Returns the number of unique values.- Specified by:
getValueCount
in classSortedDocValues
- Returns:
- number of unique values in this SortedDocValues. This is also equivalent to one plus the maximum ordinal.
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cost
public long cost()
Description copied from class:DocIdSetIterator
Returns the estimated cost of thisDocIdSetIterator
.This is generally an upper bound of the number of documents this iterator might match, but may be a rough heuristic, hardcoded value, or otherwise completely inaccurate.
- Specified by:
cost
in classDocIdSetIterator
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