Package org.apache.arrow.vector

Class UInt8Vector

java.lang.Object

org.apache.arrow.vector.BaseValueVector

org.apache.arrow.vector.BaseFixedWidthVector

org.apache.arrow.vector.UInt8Vector

All Implemented Interfaces:

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

public final class UInt8Vector
extends BaseFixedWidthVector
implements BaseIntVector

UInt8Vector implements a fixed width vector (8 bytes) of integer 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 long	MAX_UINT8	The maximum 64-bit unsigned long integer.
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
UInt8Vector(String name, BufferAllocator allocator)
UInt8Vector(String name, FieldType fieldType, BufferAllocator allocator)
UInt8Vector(Field field, BufferAllocator allocator)	Constructor for UInt8Vector.

Method Summary

Modifier and Type	Method	Description
long	get(int index)	Get the element at the given index from the vector.
void	get(int index, NullableUInt8Holder holder)	Get the element at the given index from the vector and sets the state in holder.
Types.MinorType	getMinorType()
static BigInteger	getNoOverflow(ArrowBuf buffer, int index)	Given a data buffer, get the value stored at a particular position in the vector.
Long	getObject(int index)	Same as get(int).
BigInteger	getObjectNoOverflow(int index)	Returns the value stored at index without the potential for overflow.
protected FieldReader	getReaderImpl()	Each vector has a different reader that implements the FieldReader interface.
TransferPair	getTransferPair(String ref, BufferAllocator allocator)	Construct a transfer pair of this vector and another vector of same type.
TransferPair	getTransferPair(Field field, BufferAllocator allocator)	Construct a TransferPair comprising this and a target vector of the same type.
long	getValueAsLong(int index)	Gets the value at index.
TransferPair	makeTransferPair(ValueVector to)	Makes a new transfer pair used to transfer underlying buffers.
void	set(int index, int isSet, long value)	Sets value at index is isSet is positive otherwise sets the index to invalid/null.
void	set(int index, long value)	Set the element at the given index to the given value.
void	set(int index, NullableUInt8Holder holder)	Set the element at the given index to the value set in data holder.
void	set(int index, UInt8Holder holder)	Set the element at the given index to the value set in data holder.
void	setSafe(int index, int isSet, long value)	Same as set(int, int, long) but will reallocate if index is greater than current capacity.
void	setSafe(int index, long value)	Same as set(int, long) except that it handles the case when index is greater than or equal to existing value capacity BaseFixedWidthVector.getValueCapacity().
void	setSafe(int index, NullableUInt8Holder holder)	Same as set(int, NullableUInt8Holder) except that it handles the case when index is greater than or equal to existing value capacity BaseFixedWidthVector.getValueCapacity().
void	setSafe(int index, UInt8Holder holder)	Same as set(int, UInt8Holder) except that it handles the case when index is greater than or equal to existing value capacity BaseFixedWidthVector.getValueCapacity().
void	setUnsafeWithPossibleTruncate(int index, long value)	Sets the value at index, note this value may need to be truncated.
void	setWithPossibleTruncate(int index, long value)	Sets the value at index, note this value may need to be truncated.
String	toString()	Representation of vector suitable for debugging.

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, 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, getChildrenFromFields, getDataBufferAddress, getFieldBuffers, getFieldInnerVectors, getOffsetBufferAddress, getValidityBufferAddress, initializeChildrenFromFields, loadFieldBuffers, setNull

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

MAX_UINT8

public static final long MAX_UINT8

The maximum 64-bit unsigned long integer.

See Also:

• Constant Field Values

TYPE_WIDTH

public static final byte TYPE_WIDTH

See Also:

• Constant Field Values

Constructor Details

UInt8Vector

public UInt8Vector(String name,
 BufferAllocator allocator)

UInt8Vector

public UInt8Vector(String name,
 FieldType fieldType,
 BufferAllocator allocator)

UInt8Vector

public UInt8Vector(Field field,
 BufferAllocator allocator)

Constructor for UInt8Vector.

Parameters:

field - Field type

allocator - Allocator type.

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()

Specified by:

getMinorType in interface ValueVector

getNoOverflow

public static BigInteger getNoOverflow(ArrowBuf buffer,
 int index)

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

To avoid overflow, the returned type is one step up from the signed type.

This method is mainly meant for integration tests.

Parameters:

buffer - data buffer

index - position of the element.

Returns:

value stored at the index.

get

public long 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,
 NullableUInt8Holder 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 Long getObject(int index)

Same as get(int).

Specified by:

getObject in interface ValueVector

Parameters:

index - position of element

Returns:

element at given index

getObjectNoOverflow

public BigInteger getObjectNoOverflow(int index)

Returns the value stored at index without the potential for overflow.

Parameters:

index - position of element

Returns:

element at given index

set

public void set(int index,
 long 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,
 NullableUInt8Holder 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,
 UInt8Holder 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,
 long value)

Same as set(int, long) 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,
 NullableUInt8Holder holder)
             throws IllegalArgumentException

Same as set(int, NullableUInt8Holder) 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,
 UInt8Holder holder)

Same as set(int, UInt8Holder) 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,
 long value)

Sets value at index is isSet is positive otherwise sets the index to invalid/null.

setSafe

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

Same as set(int, int, long) but will reallocate if index is greater than current capacity.

getTransferPair

public TransferPair getTransferPair(String ref,
 BufferAllocator allocator)

Description copied from class: BaseFixedWidthVector

Construct a transfer pair of this vector and another vector of 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)

Description copied from interface: ValueVector

Makes a new transfer pair used to transfer underlying buffers.

Specified by:

makeTransferPair in interface ValueVector

Parameters:

to - the target for the transfer

Returns:

a new transfer pair that is used to transfer underlying buffers into the target vector.

setWithPossibleTruncate

public void setWithPossibleTruncate(int index,
 long value)

Description copied from interface: BaseIntVector

Sets the value at index, note this value may need to be truncated. Note this is safe version (i.e. call setSafe(int, ...) method in vector)

Specified by:

setWithPossibleTruncate in interface BaseIntVector

setUnsafeWithPossibleTruncate

public void setUnsafeWithPossibleTruncate(int index,
 long value)

Description copied from interface: BaseIntVector

Sets the value at index, note this value may need to be truncated. Note this is unsafe version (i.e. call set(int, ...) method in vector)

Specified by:

setUnsafeWithPossibleTruncate in interface BaseIntVector

getValueAsLong

public long getValueAsLong(int index)

Description copied from interface: BaseIntVector

Gets the value at index. This value may have been extended to long and will throw NullPointerException if the value is null. Note null check could be turned off via NullCheckingForGet.

Specified by:

getValueAsLong in interface BaseIntVector

toString

public String toString()

Description copied from class: BaseValueVector

Representation of vector suitable for debugging.

Overrides:

toString in class BaseValueVector