Class OffHeapVectorValues.EmptyOffHeapVectorValues
- java.lang.Object
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- org.apache.lucene.search.DocIdSetIterator
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- org.apache.lucene.index.VectorValues
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- org.apache.lucene.codecs.lucene92.OffHeapVectorValues
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- org.apache.lucene.codecs.lucene92.OffHeapVectorValues.EmptyOffHeapVectorValues
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- All Implemented Interfaces:
RandomAccessVectorValues
,RandomAccessVectorValuesProducer
- Enclosing class:
- OffHeapVectorValues
private static class OffHeapVectorValues.EmptyOffHeapVectorValues extends OffHeapVectorValues
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.lucene.codecs.lucene92.OffHeapVectorValues
OffHeapVectorValues.DenseOffHeapVectorValues
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Field Summary
Fields Modifier and Type Field Description private int
doc
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Fields inherited from class org.apache.lucene.codecs.lucene92.OffHeapVectorValues
binaryValue, byteBuffer, byteSize, dimension, size, slice, value
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Fields inherited from class org.apache.lucene.index.VectorValues
EMPTY, MAX_DIMENSIONS
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Fields inherited from class org.apache.lucene.search.DocIdSetIterator
NO_MORE_DOCS
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Constructor Summary
Constructors Constructor Description EmptyOffHeapVectorValues(int dimension)
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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.BytesRef
binaryValue()
Return the binary encoded vector value for the current document ID.BytesRef
binaryValue(int targetOrd)
Return the vector indexed at the given ordinal value as an array of bytes in a BytesRef; these are the bytes corresponding to the float array.long
cost()
Returns the estimated cost of thisDocIdSetIterator
.int
dimension()
Return the dimension of the vectorsint
docID()
Returns the following:-1
ifDocIdSetIterator.nextDoc()
orDocIdSetIterator.advance(int)
were not called yet.(package private) Bits
getAcceptOrds(Bits acceptDocs)
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
ordToDoc(int ord)
RandomAccessVectorValues
randomAccess()
Return a random access interface over this iterator's vectors.int
size()
TODO: should we use cost() for this? We rely on its always being exactly the number of documents having a value for this field, which is not guaranteed by the cost() contract, but in all the implementations so far they are the same.float[]
vectorValue()
Return the vector value for the current document ID.float[]
vectorValue(int targetOrd)
Return the vector value indexed at the given ordinal.-
Methods inherited from class org.apache.lucene.codecs.lucene92.OffHeapVectorValues
load
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Methods inherited from class org.apache.lucene.search.DocIdSetIterator
all, empty, range, slowAdvance
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Method Detail
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dimension
public int dimension()
Description copied from class:VectorValues
Return the dimension of the vectors- Specified by:
dimension
in interfaceRandomAccessVectorValues
- Overrides:
dimension
in classOffHeapVectorValues
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size
public int size()
Description copied from class:VectorValues
TODO: should we use cost() for this? We rely on its always being exactly the number of documents having a value for this field, which is not guaranteed by the cost() contract, but in all the implementations so far they are the same.- Specified by:
size
in interfaceRandomAccessVectorValues
- Overrides:
size
in classOffHeapVectorValues
- Returns:
- the number of vectors returned by this iterator
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vectorValue
public float[] vectorValue() throws java.io.IOException
Description copied from class:VectorValues
Return the vector value for the current document ID. It is illegal to call this method when the iterator is not positioned: before advancing, or after failing to advance. The returned array may be shared across calls, re-used, and modified as the iterator advances.- Specified by:
vectorValue
in classVectorValues
- Returns:
- the vector value
- Throws:
java.io.IOException
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binaryValue
public BytesRef binaryValue() throws java.io.IOException
Description copied from class:VectorValues
Return the binary encoded vector value for the current document ID. These are the bytes corresponding to the float array return byVectorValues.vectorValue()
. It is illegal to call this method when the iterator is not positioned: before advancing, or after failing to advance. The returned storage may be shared across calls, re-used and modified as the iterator advances.- Overrides:
binaryValue
in classVectorValues
- Returns:
- the binary value
- Throws:
java.io.IOException
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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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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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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.
- Overrides:
cost
in classOffHeapVectorValues
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randomAccess
public RandomAccessVectorValues randomAccess() throws java.io.IOException
Description copied from interface:RandomAccessVectorValuesProducer
Return a random access interface over this iterator's vectors. Calling the RandomAccess methods will have no effect on the progress of the iteration or the values returned by this iterator. Successive calls will retrieve independent copies that do not overwrite each others' returned values.- Throws:
java.io.IOException
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vectorValue
public float[] vectorValue(int targetOrd) throws java.io.IOException
Description copied from interface:RandomAccessVectorValues
Return the vector value indexed at the given ordinal. The provided floating point array may be shared and overwritten by subsequent calls to this method andRandomAccessVectorValues.binaryValue(int)
.- Specified by:
vectorValue
in interfaceRandomAccessVectorValues
- Overrides:
vectorValue
in classOffHeapVectorValues
- Parameters:
targetOrd
- a valid ordinal, ≥ 0 and <RandomAccessVectorValues.size()
.- Throws:
java.io.IOException
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binaryValue
public BytesRef binaryValue(int targetOrd) throws java.io.IOException
Description copied from interface:RandomAccessVectorValues
Return the vector indexed at the given ordinal value as an array of bytes in a BytesRef; these are the bytes corresponding to the float array. The provided bytes may be shared and overwritten by subsequent calls to this method andRandomAccessVectorValues.vectorValue(int)
.- Specified by:
binaryValue
in interfaceRandomAccessVectorValues
- Overrides:
binaryValue
in classOffHeapVectorValues
- Parameters:
targetOrd
- a valid ordinal, ≥ 0 and <RandomAccessVectorValues.size()
.- Throws:
java.io.IOException
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ordToDoc
public int ordToDoc(int ord)
- Specified by:
ordToDoc
in classOffHeapVectorValues
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getAcceptOrds
Bits getAcceptOrds(Bits acceptDocs)
- Specified by:
getAcceptOrds
in classOffHeapVectorValues
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