org.apache.arrow.vector.complex

Class NullableMapVector

java.lang.Object

org.apache.arrow.vector.complex.AbstractContainerVector

org.apache.arrow.vector.complex.AbstractMapVector

org.apache.arrow.vector.complex.MapVector

org.apache.arrow.vector.complex.NullableMapVector

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<ValueVector>, FieldVector, ValueVector

public class NullableMapVector
extends MapVector
implements FieldVector

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	NullableMapVector.Accessor
class	NullableMapVector.Mutator
protected class	NullableMapVector.NullableMapTransferPair

Nested classes/interfaces inherited from class org.apache.arrow.vector.complex.MapVector

MapVector.MapTransferPair

Field Summary

Fields

Modifier and Type	Field and Description
protected BitVector	bits

Fields inherited from class org.apache.arrow.vector.complex.AbstractContainerVector

allocator, callBack, name

Constructor Summary

Constructors

Constructor and Description
NullableMapVector(String name, BufferAllocator allocator, CallBack callBack)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	allocateNewSafe() Allocates new buffers.
void	clear() Release the underlying ArrowBuf and reset the ValueVector to empty.
void	close() Clears out all underlying child vectors.
NullableMapVector.Accessor	getAccessor() Returns an accessor that is used to read from this vector instance.
ArrowBuf[]	getBuffers(boolean clear) Return the underlying buffers associated with this vector.
int	getBufferSize() Returns the number of bytes that is used by this vector instance.
int	getBufferSizeFor(int valueCount) Returns the number of bytes that is used by this vector if it holds the given number of values.
List<ArrowBuf>	getFieldBuffers() (same size as getFieldVectors() since it is their content)
List<BufferBacked>	getFieldInnerVectors()
NullableMapVector.Mutator	getMutator() Returns an mutator that is used to write to this vector instance.
FieldReader	getReader() Returns a field reader that supports reading values from this vector.
TransferPair	getTransferPair(BufferAllocator allocator) Returns a transfer pair, creating a new target vector of the same type.
TransferPair	getTransferPair(String ref, BufferAllocator allocator)
int	getValueCapacity() Returns the maximum number of values that can be stored in this vector instance.
void	loadFieldBuffers(ArrowFieldNode fieldNode, List<ArrowBuf> ownBuffers) loads data in the vectors (ownBuffers must be the same size as getFieldVectors())
TransferPair	makeTransferPair(ValueVector to) Returns a new transfer pair that is used to transfer underlying buffers into the target vector.
void	setInitialCapacity(int numRecords) Set the initial record capacity

Methods inherited from class org.apache.arrow.vector.complex.MapVector

copyFromSafe, fieldNameIterator, getChildrenFromFields, getField, getMinorType, getVectorById, initializeChildrenFromFields, supportsDirectRead

Methods inherited from class org.apache.arrow.vector.complex.AbstractMapVector

add, addOrGet, getChild, getChildByOrdinal, getChildFieldNames, getChildren, getChildVectorWithOrdinal, getPrimitiveVectors, iterator, putChild, putVector, size

Methods inherited from class org.apache.arrow.vector.complex.AbstractContainerVector

allocateNew, getAllocator, getChild, typeify

Methods inherited from class java.lang.Object

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

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

getChildrenFromFields, initializeChildrenFromFields

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

allocateNew, getAllocator, getField, getMinorType

Methods inherited from interface java.lang.Iterable

iterator

Field Detail

bits

protected final BitVector bits

Constructor Detail

NullableMapVector

public NullableMapVector(String name,
                 BufferAllocator allocator,
                 CallBack callBack)

Method Detail

loadFieldBuffers

public void loadFieldBuffers(ArrowFieldNode fieldNode,
                    List<ArrowBuf> ownBuffers)

Description copied from interface: FieldVector

loads data in the vectors (ownBuffers must be the same size as getFieldVectors())

Specified by:

loadFieldBuffers in interface FieldVector

Parameters:

fieldNode - the fieldNode

ownBuffers - the buffers for this Field (own buffers only, children not included)

getFieldBuffers

public List<ArrowBuf> getFieldBuffers()

Description copied from interface: FieldVector

(same size as getFieldVectors() since it is their content)

Specified by:

getFieldBuffers in interface FieldVector

Returns:

the buffers containing the data for this vector (ready for reading)

getFieldInnerVectors

public List<BufferBacked> getFieldInnerVectors()

Specified by:

getFieldInnerVectors in interface FieldVector

Returns:

the inner vectors for this field as defined by the TypeLayout

getReader

public FieldReader getReader()

Description copied from interface: ValueVector

Returns a field reader that supports reading values from this vector.

Specified by:

getReader in interface ValueVector

Overrides:

getReader in class MapVector

getTransferPair

public TransferPair getTransferPair(BufferAllocator allocator)

Description copied from interface: ValueVector

Returns a transfer pair, creating a new target vector of the same type.

Specified by:

getTransferPair in interface ValueVector

Overrides:

getTransferPair in class MapVector

makeTransferPair

public TransferPair makeTransferPair(ValueVector to)

Description copied from interface: ValueVector

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

Specified by:

makeTransferPair in interface ValueVector

Overrides:

makeTransferPair in class MapVector

getTransferPair

public TransferPair getTransferPair(String ref,
                           BufferAllocator allocator)

Specified by:

getTransferPair in interface ValueVector

Overrides:

getTransferPair in class MapVector

getValueCapacity

public int getValueCapacity()

Description copied from interface: ValueVector

Returns the maximum number of values that can be stored in this vector instance.

Specified by:

getValueCapacity in interface ValueVector

Overrides:

getValueCapacity in class MapVector

getBuffers

public ArrowBuf[] getBuffers(boolean clear)

Description copied from interface: ValueVector

Return the underlying buffers associated with this vector. Note that this doesn't impact the reference counts for this buffer so it only should be used for in-context access. Also note that this buffer changes regularly thus external classes shouldn't hold a reference to it (unless they change it).

Specified by:

getBuffers in interface ValueVector

Overrides:

getBuffers in class AbstractMapVector

Parameters:

clear - Whether to clear vector before returning; the buffers will still be refcounted; but the returned array will be the only reference to them

Returns:

The underlying buffers that is used by this vector instance.

close

public void close()

Description copied from class: AbstractContainerVector

Clears out all underlying child vectors.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ValueVector

Overrides:

close in class MapVector

clear

public void clear()

Description copied from interface: ValueVector

Release the underlying ArrowBuf and reset the ValueVector to empty.

Specified by:

clear in interface ValueVector

Overrides:

clear in class MapVector

getBufferSize

public int getBufferSize()

Description copied from interface: ValueVector

Returns the number of bytes that is used by this vector instance.

Specified by:

getBufferSize in interface ValueVector

Overrides:

getBufferSize in class MapVector

getBufferSizeFor

public int getBufferSizeFor(int valueCount)

Description copied from interface: ValueVector

Returns the number of bytes that is used by this vector if it holds the given number of values. The result will be the same as if Mutator.setValueCount() were called, followed by calling getBufferSize(), but without any of the closing side-effects that setValueCount() implies wrt finishing off the population of a vector. Some operations might wish to use this to determine how much memory has been used by a vector so far, even though it is not finished being populated.

Specified by:

getBufferSizeFor in interface ValueVector

Overrides:

getBufferSizeFor in class MapVector

Parameters:

valueCount - the number of values to assume this vector contains

Returns:

the buffer size if this vector is holding valueCount values

setInitialCapacity

public void setInitialCapacity(int numRecords)

Description copied from interface: ValueVector

Set the initial record capacity

Specified by:

setInitialCapacity in interface ValueVector

Overrides:

setInitialCapacity in class MapVector

Parameters:

numRecords - the initial record capacity.

allocateNewSafe

public boolean allocateNewSafe()

Description copied from interface: ValueVector

Allocates new buffers. ValueVector implements logic to determine how much to allocate.

Specified by:

allocateNewSafe in interface ValueVector

Overrides:

allocateNewSafe in class AbstractMapVector

Returns:

Returns true if allocation was successful.

getAccessor

public NullableMapVector.Accessor getAccessor()

Description copied from interface: ValueVector

Returns an accessor that is used to read from this vector instance.

Specified by:

getAccessor in interface ValueVector

Overrides:

getAccessor in class MapVector

getMutator

public NullableMapVector.Mutator getMutator()

Description copied from interface: ValueVector

Returns an mutator that is used to write to this vector instance.

Specified by:

getMutator in interface ValueVector

Overrides:

getMutator in class MapVector