Package org.apache.arrow.vector

Class Float8Vector

java.lang.Object

org.apache.arrow.vector.BaseValueVector

org.apache.arrow.vector.BaseFixedWidthVector

org.apache.arrow.vector.Float8Vector

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<ValueVector>, ElementAddressableVector, FieldVector, FixedWidthVector, FloatingPointVector, ValueVector, VectorDefinitionSetter

public final class Float8Vector
extends BaseFixedWidthVector
implements FloatingPointVector

Float8Vector implements a fixed width vector (8 bytes) of double values which could be null. A validity buffer (bit vector) is maintained to track which elements in the vector are null.

Field Summary

Fields

Modifier and Type	Field	Description
static final byte	TYPE_WIDTH

Fields inherited from class org.apache.arrow.vector.BaseFixedWidthVector

actualValueCapacity, field, lastValueCapacity, validityBuffer, valueBuffer, valueCount

Fields inherited from class org.apache.arrow.vector.BaseValueVector

allocator, fieldReader, INITIAL_VALUE_ALLOCATION, MAX_ALLOCATION_SIZE, MAX_ALLOCATION_SIZE_PROPERTY

Constructor Summary

Constructors

Constructor	Description
Float8Vector(String name, BufferAllocator allocator)	Instantiate a Float8Vector.
Float8Vector(String name, FieldType fieldType, BufferAllocator allocator)	Instantiate a Float8Vector.
Float8Vector(Field field, BufferAllocator allocator)	Instantiate a Float8Vector.

Method Summary

Modifier and Type	Method	Description
double	get(int index)	Get the element at the given index from the vector.
void	get(int index, NullableFloat8Holder holder)	Get the element at the given index from the vector and sets the state in holder.
static double	get(ArrowBuf buffer, int index)	Given a data buffer, get the value stored at a particular position in the vector.
Types.MinorType	getMinorType()	Get minor type for this vector.
Double	getObject(int index)	Same as get(int).
protected FieldReader	getReaderImpl()	Each vector has a different reader that implements the FieldReader interface.
TransferPair	getTransferPair(String ref, BufferAllocator allocator)	Construct a TransferPair comprising this and a target vector of the same type.
TransferPair	getTransferPair(Field field, BufferAllocator allocator)	Construct a TransferPair comprising this and a target vector of the same type.
double	getValueAsDouble(int index)	Gets the value at the given index.
TransferPair	makeTransferPair(ValueVector to)	Construct a TransferPair with a desired target vector of the same type.
void	set(int index, double value)	Set the element at the given index to the given value.
void	set(int index, int isSet, double value)	Store the given value at a particular position in the vector.
void	set(int index, Float8Holder holder)	Set the element at the given index to the value set in data holder.
void	set(int index, NullableFloat8Holder holder)	Set the element at the given index to the value set in data holder.
void	setSafe(int index, double value)	Same as set(int, double) except that it handles the case when index is greater than or equal to existing value capacity BaseFixedWidthVector.getValueCapacity().
void	setSafe(int index, int isSet, double value)	Same as set(int, int, double) except that it handles the case when index is greater than or equal to current value capacity of the vector.
void	setSafe(int index, Float8Holder holder)	Same as set(int, Float8Holder) except that it handles the case when index is greater than or equal to existing value capacity BaseFixedWidthVector.getValueCapacity().
void	setSafe(int index, NullableFloat8Holder holder)	Same as set(int, NullableFloat8Holder) except that it handles the case when index is greater than or equal to existing value capacity BaseFixedWidthVector.getValueCapacity().
void	setSafeWithPossibleTruncate(int index, double value)	Sets the value at the given index, note this value may be truncated internally.
void	setWithPossibleTruncate(int index, double value)	Sets the value at the given index, note this value may be truncated internally.

Methods inherited from class org.apache.arrow.vector.BaseFixedWidthVector

accept, allocateNew, allocateNew, allocateNewSafe, clear, close, copyFrom, copyFromSafe, decrementAllocationMonitor, getBuffers, getBufferSize, getBufferSizeFor, getChildrenFromFields, getDataBuffer, getDataBufferAddress, getDataPointer, getDataPointer, getField, getFieldBuffers, getFieldInnerVectors, getName, getNullCount, getOffsetBuffer, getOffsetBufferAddress, getTransferPair, getTransferPair, getTransferPair, getTypeWidth, getValidityBuffer, getValidityBufferAddress, getValidityBufferValueCapacity, getValueBufferValueCapacity, getValueCapacity, getValueCount, handleSafe, hashCode, hashCode, incrementAllocationMonitor, initializeChildrenFromFields, isNull, isSafe, isSet, loadFieldBuffers, reAlloc, refreshValueCapacity, reset, set, set, setIndexDefined, setInitialCapacity, setNull, setSafe, setSafe, setValueCount, splitAndTransferTo, transferTo, validateScalars, zeroVector

Methods inherited from class org.apache.arrow.vector.BaseValueVector

checkBufRefs, getAllocator, getReader, getValidityBufferSizeFromCount, iterator, releaseBuffer, toString, transferBuffer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.arrow.vector.FieldVector

exportBuffer, exportCDataBuffers

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Methods inherited from interface org.apache.arrow.vector.ValueVector

accept, allocateNew, allocateNewSafe, clear, close, copyFrom, copyFromSafe, getAllocator, getBuffers, getBufferSize, getBufferSizeFor, getDataBuffer, getField, getName, getNullCount, getOffsetBuffer, getReader, getTransferPair, getTransferPair, getTransferPair, getValidityBuffer, getValueCapacity, getValueCount, hashCode, hashCode, isNull, reAlloc, reset, setInitialCapacity, setValueCount, validate, validateFull

Field Details

TYPE_WIDTH

public static final byte TYPE_WIDTH

See Also:

• Constant Field Values

Constructor Details

Float8Vector

public Float8Vector(String name,
 BufferAllocator allocator)

Instantiate a Float8Vector. This doesn't allocate any memory for the data in vector.

Parameters:

name - name of the vector

allocator - allocator for memory management.

Float8Vector

public Float8Vector(String name,
 FieldType fieldType,
 BufferAllocator allocator)

Instantiate a Float8Vector. This doesn't allocate any memory for the data in vector.

Parameters:

name - name of the vector

fieldType - type of Field materialized by this vector

allocator - allocator for memory management.

Float8Vector

public Float8Vector(Field field,
 BufferAllocator allocator)

Instantiate a Float8Vector. This doesn't allocate any memory for the data in vector.

Parameters:

field - field materialized by this vector

allocator - allocator for memory management.

Method Details

getReaderImpl

protected FieldReader getReaderImpl()

Description copied from class: BaseValueVector

Each vector has a different reader that implements the FieldReader interface. Overridden methods must make sure to return the correct concrete reader implementation.

Specified by:

getReaderImpl in class BaseValueVector

Returns:

Returns a lambda that initializes a reader when called.

getMinorType

public Types.MinorType getMinorType()

Get minor type for this vector. The vector holds values belonging to a particular type.

Specified by:

getMinorType in interface ValueVector

Returns:

Types.MinorType

get

public double get(int index)
           throws IllegalStateException

Get the element at the given index from the vector.

Parameters:

index - position of element

Returns:

element at given index

Throws:

IllegalStateException

get

public void get(int index,
 NullableFloat8Holder holder)

Get the element at the given index from the vector and sets the state in holder. If element at given index is null, holder.isSet will be zero.

Parameters:

index - position of element

getObject

public Double getObject(int index)

Same as get(int).

Specified by:

getObject in interface ValueVector

Parameters:

index - position of element

Returns:

element at given index

set

public void set(int index,
 double value)

Set the element at the given index to the given value.

Parameters:

index - position of element

value - value of element

set

public void set(int index,
 NullableFloat8Holder holder)
         throws IllegalArgumentException

Set the element at the given index to the value set in data holder. If the value in holder is not indicated as set, element in the at the given index will be null.

Parameters:

index - position of element

holder - nullable data holder for value of element

Throws:

IllegalArgumentException

set

public void set(int index,
 Float8Holder holder)

Set the element at the given index to the value set in data holder.

Parameters:

index - position of element

holder - data holder for value of element

setSafe

public void setSafe(int index,
 double value)

Same as set(int, double) except that it handles the case when index is greater than or equal to existing value capacity BaseFixedWidthVector.getValueCapacity().

Parameters:

index - position of element

value - value of element

setSafe

public void setSafe(int index,
 NullableFloat8Holder holder)
             throws IllegalArgumentException

Same as set(int, NullableFloat8Holder) except that it handles the case when index is greater than or equal to existing value capacity BaseFixedWidthVector.getValueCapacity().

Parameters:

index - position of element

holder - nullable data holder for value of element

Throws:

IllegalArgumentException

setSafe

public void setSafe(int index,
 Float8Holder holder)

Same as set(int, Float8Holder) except that it handles the case when index is greater than or equal to existing value capacity BaseFixedWidthVector.getValueCapacity().

Parameters:

index - position of element

holder - data holder for value of element

set

public void set(int index,
 int isSet,
 double value)

Store the given value at a particular position in the vector. isSet indicates whether the value is NULL or not.

Parameters:

index - position of the new value

isSet - 0 for NULL value, 1 otherwise

value - element value

setSafe

public void setSafe(int index,
 int isSet,
 double value)

Same as set(int, int, double) except that it handles the case when index is greater than or equal to current value capacity of the vector.

Parameters:

index - position of the new value

isSet - 0 for NULL value, 1 otherwise

value - element value

get

public static double get(ArrowBuf buffer,
 int index)

Given a data buffer, get the value stored at a particular position in the vector.

This method should not be used externally.

Parameters:

buffer - data buffer

index - position of the element.

Returns:

value stored at the index.

setWithPossibleTruncate

public void setWithPossibleTruncate(int index,
 double value)

Description copied from interface: FloatingPointVector

Sets the value at the given index, note this value may be truncated internally.

Specified by:

setWithPossibleTruncate in interface FloatingPointVector

Parameters:

index - the index to set.

value - the value to set.

setSafeWithPossibleTruncate

public void setSafeWithPossibleTruncate(int index,
 double value)

Description copied from interface: FloatingPointVector

Sets the value at the given index, note this value may be truncated internally. Any expansion/reallocation is handled automatically.

Specified by:

setSafeWithPossibleTruncate in interface FloatingPointVector

Parameters:

index - the index to set.

value - the value to set.

getValueAsDouble

public double getValueAsDouble(int index)

Description copied from interface: FloatingPointVector

Gets the value at the given index.

Specified by:

getValueAsDouble in interface FloatingPointVector

Parameters:

index - the index to retrieve the value.

Returns:

the value at the index.

getTransferPair

public TransferPair getTransferPair(String ref,
 BufferAllocator allocator)

Construct a TransferPair comprising this and a target vector of the same type.

Specified by:

getTransferPair in interface ValueVector

Specified by:

getTransferPair in class BaseFixedWidthVector

Parameters:

ref - name of the target vector

allocator - allocator for the target vector

Returns:

TransferPair

getTransferPair

public TransferPair getTransferPair(Field field,
 BufferAllocator allocator)

Construct a TransferPair comprising this and a target vector of the same type.

Specified by:

getTransferPair in interface ValueVector

Specified by:

getTransferPair in class BaseFixedWidthVector

Parameters:

field - Field object used by the target vector

allocator - allocator for the target vector

Returns:

TransferPair

makeTransferPair

public TransferPair makeTransferPair(ValueVector to)

Construct a TransferPair with a desired target vector of the same type.

Specified by:

makeTransferPair in interface ValueVector

Parameters:

to - target vector

Returns:

TransferPair