org.apache.drill.exec.vector

Class NullableVar16CharVector

java.lang.Object

org.apache.drill.exec.vector.BaseValueVector

org.apache.drill.exec.vector.BaseDataValueVector

org.apache.drill.exec.vector.NullableVar16CharVector

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<ValueVector>, NullableVector, ValueVector, VariableWidthVector

public final class NullableVar16CharVector
extends BaseDataValueVector
implements VariableWidthVector, NullableVector

NullableVar16Char implements a vector of values which could be null. Elements in the vector are first checked against a fixed length vector of boolean values. Then the element is retrieved from the base class (if not null). NB: this class is automatically generated from NullableValueVectors.java and ValueVectorTypes.tdd using FreeMarker.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	NullableVar16CharVector.Accessor
class	NullableVar16CharVector.Mutator

Nested classes/interfaces inherited from class org.apache.drill.exec.vector.BaseValueVector

BaseValueVector.BaseAccessor, BaseValueVector.BaseMutator

Nested classes/interfaces inherited from interface org.apache.drill.exec.vector.VariableWidthVector

VariableWidthVector.VariableWidthAccessor, VariableWidthVector.VariableWidthMutator

Field Summary

Fields inherited from class org.apache.drill.exec.vector.BaseDataValueVector

data, emptyByteArray

Fields inherited from class org.apache.drill.exec.vector.BaseValueVector

allocator, field, INITIAL_VALUE_ALLOCATION, MAX_ALLOCATION_SIZE

Fields inherited from interface org.apache.drill.exec.vector.VariableWidthVector

DEFAULT_RECORD_BYTE_COUNT, MIN_BYTE_COUNT, offsetsField

Fields inherited from interface org.apache.drill.exec.vector.NullableVector

bitsField

Fields inherited from interface org.apache.drill.exec.vector.ValueVector

BITS_VECTOR_NAME, MAX_BUFFER_SIZE, MAX_ROW_COUNT, MIN_ROW_COUNT, OFFSETS_VECTOR_NAME, VALUES_VECTOR_NAME

Constructor Summary

Constructors

Constructor and Description
NullableVar16CharVector(MaterializedField field, BufferAllocator allocator)

Method Summary

Modifier and Type	Method and Description
void	allocateNew() Allocate new buffers.
void	allocateNew(int totalBytes, int valueCount) Allocate a new memory space for this vector.
boolean	allocateNewSafe() Allocates new buffers.
void	clear() Release the underlying DrillBuf and reset the ValueVector to empty.
void	close() Alternative to clear().
void	collectLedgers(Set<AllocationManager.BufferLedger> ledgers) Add the ledgers underlying the buffers underlying the components of the vector to the set provided.
Var16CharVector	convertToRequiredVector()
void	copyEntry(int toIndex, ValueVector from, int fromIndex)
void	copyFrom(int fromIndex, int thisIndex, NullableVar16CharVector from)
void	copyFromSafe(int fromIndex, int thisIndex, NullableVar16CharVector from)
void	copyFromSafe(int fromIndex, int thisIndex, Var16CharVector from)
void	exchange(ValueVector other) Exchange state with another value vector of the same type.
NullableVar16CharVector.Accessor	getAccessor() Returns an accessor that is used to read from this vector instance.
int	getAllocatedSize() Returns the total size of buffers allocated by this vector.
int	getBitsValueCapacity()
UInt1Vector	getBitsVector()
DrillBuf	getBuffer()
DrillBuf[]	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.
int	getByteCapacity() Provide the maximum amount of variable width bytes that can be stored int his vector.
int	getCurrentSizeInBytes()
UserBitShared.SerializedField.Builder	getMetadataBuilder()
NullableVar16CharVector.Mutator	getMutator() Returns an mutator that is used to write to this vector instance.
UInt4Vector	getOffsetVector()
int	getPayloadByteCount(int valueCount) Return the number of value bytes consumed by actual data.
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.
Var16CharVector	getValuesVector()
void	load(UserBitShared.SerializedField metadata, DrillBuf buffer) Load the data provided in the buffer.
TransferPair	makeTransferPair(ValueVector to) Returns a new transfer pair that is used to transfer underlying buffers into the target vector.
DrillBuf	reallocRaw(int newAllocationSize) Core of vector allocation.
void	reset() This method has a similar effect of allocateNew() without actually clearing and reallocating the value vector.
void	setInitialCapacity(int numRecords) Set the initial record capacity
void	splitAndTransferTo(int startIndex, int length, NullableVar16CharVector target)
void	transferTo(NullableVar16CharVector target)

Methods inherited from class org.apache.drill.exec.vector.BaseValueVector

checkBufRefs, fillBitsVector, getAllocator, getField, getField, getMetadata, iterator, toNullable, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.drill.exec.vector.ValueVector

getAllocator, getField, getMetadata, toNullable

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Constructor Detail

NullableVar16CharVector

public NullableVar16CharVector(MaterializedField field,
                               BufferAllocator allocator)

Method Detail

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

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

getBuffers

public DrillBuf[] 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 BaseDataValueVector

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 interface: ValueVector

Alternative to clear(). Allows use as an AutoCloseable in try-with-resources.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ValueVector

Overrides:

close in class BaseDataValueVector

clear

public void clear()

Description copied from interface: ValueVector

Release the underlying DrillBuf and reset the ValueVector to empty.

Specified by:

clear in interface ValueVector

Overrides:

clear in class BaseDataValueVector

getBufferSize

public int getBufferSize()

Description copied from interface: ValueVector

Returns the number of bytes that is used by this vector instance. This is a bit of a misnomer. Returns the number of bytes used by data in this instance.

Specified by:

getBufferSize in interface ValueVector

Overrides:

getBufferSize in class BaseDataValueVector

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

Parameters:

valueCount - the number of values to assume this vector contains

Returns:

the buffer size if this vector is holding valueCount values

getAllocatedSize

public int getAllocatedSize()

Description copied from interface: ValueVector

Returns the total size of buffers allocated by this vector. Has meaning only when vectors are directly allocated and each vector has its own buffer. Does not have meaning for vectors deserialized from the network or disk in which multiple vectors share the same vector.

Specified by:

getAllocatedSize in interface ValueVector

Overrides:

getAllocatedSize in class BaseDataValueVector

Returns:

allocated buffer size, in bytes

getBuffer

public DrillBuf getBuffer()

Overrides:

getBuffer in class BaseDataValueVector

getValuesVector

public Var16CharVector getValuesVector()

Specified by:

getValuesVector in interface NullableVector

getBitsVector

public UInt1Vector getBitsVector()

Specified by:

getBitsVector in interface NullableVector

getOffsetVector

public UInt4Vector getOffsetVector()

Specified by:

getOffsetVector in interface VariableWidthVector

setInitialCapacity

public void setInitialCapacity(int numRecords)

Description copied from interface: ValueVector

Set the initial record capacity

Specified by:

setInitialCapacity in interface ValueVector

getMetadataBuilder

public UserBitShared.SerializedField.Builder getMetadataBuilder()

Overrides:

getMetadataBuilder in class BaseValueVector

allocateNew

public void allocateNew()

Description copied from interface: ValueVector

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

Specified by:

allocateNew in interface ValueVector

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

Returns:

Returns true if allocation was successful.

reallocRaw

public DrillBuf reallocRaw(int newAllocationSize)

Description copied from class: BaseDataValueVector

Core of vector allocation. Given a new size (which must be a power of two), allocate the new buffer, copy the current values, and leave the unused parts garbage-filled.

Specified by:

reallocRaw in class BaseDataValueVector

Parameters:

newAllocationSize - new buffer size as a power of two

Returns:

the new buffer

collectLedgers

public void collectLedgers(Set<AllocationManager.BufferLedger> ledgers)

Description copied from interface: ValueVector

Add the ledgers underlying the buffers underlying the components of the vector to the set provided. Used to determine actual memory allocation.

Specified by:

collectLedgers in interface ValueVector

Overrides:

collectLedgers in class BaseDataValueVector

Parameters:

ledgers - set of ledgers to which to add ledgers for this vector

getPayloadByteCount

public int getPayloadByteCount(int valueCount)

Description copied from interface: ValueVector

Return the number of value bytes consumed by actual data.

Specified by:

getPayloadByteCount in interface ValueVector

allocateNew

public void allocateNew(int totalBytes,
                        int valueCount)

Description copied from interface: VariableWidthVector

Allocate a new memory space for this vector. Must be called prior to using the ValueVector.

Specified by:

allocateNew in interface VariableWidthVector

Parameters:

totalBytes - Desired size of the underlying data buffer.

valueCount - Number of values in the vector.

reset

public void reset()

Description copied from class: BaseDataValueVector

This method has a similar effect of allocateNew() without actually clearing and reallocating the value vector. The purpose is to move the value vector to a "mutate" state

Overrides:

reset in class BaseDataValueVector

getByteCapacity

public int getByteCapacity()

Description copied from interface: VariableWidthVector

Provide the maximum amount of variable width bytes that can be stored int his vector.

Specified by:

getByteCapacity in interface VariableWidthVector

Returns:

getCurrentSizeInBytes

public int getCurrentSizeInBytes()

Specified by:

getCurrentSizeInBytes in interface VariableWidthVector

load

public void load(UserBitShared.SerializedField metadata,
                 DrillBuf buffer)

Description copied from interface: ValueVector

Load the data provided in the buffer. Typically used when deserializing from the wire.

Specified by:

load in interface ValueVector

Parameters:

metadata - Metadata used to decode the incoming buffer.

buffer - The buffer that contains the ValueVector.

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 BaseValueVector

getTransferPair

public TransferPair getTransferPair(String ref,
                                    BufferAllocator allocator)

Specified by:

getTransferPair in interface ValueVector

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

transferTo

public void transferTo(NullableVar16CharVector target)

splitAndTransferTo

public void splitAndTransferTo(int startIndex,
                               int length,
                               NullableVar16CharVector target)

getAccessor

public NullableVar16CharVector.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

Specified by:

getAccessor in interface VariableWidthVector

getMutator

public NullableVar16CharVector.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

Specified by:

getMutator in interface VariableWidthVector

convertToRequiredVector

public Var16CharVector convertToRequiredVector()

getBitsValueCapacity

public int getBitsValueCapacity()

Returns:

Underlying "bits" vector value capacity

copyFrom

public void copyFrom(int fromIndex,
                     int thisIndex,
                     NullableVar16CharVector from)

copyFromSafe

public void copyFromSafe(int fromIndex,
                         int thisIndex,
                         Var16CharVector from)

copyFromSafe

public void copyFromSafe(int fromIndex,
                         int thisIndex,
                         NullableVar16CharVector from)

copyEntry

public void copyEntry(int toIndex,
                      ValueVector from,
                      int fromIndex)

Specified by:

copyEntry in interface ValueVector

exchange

public void exchange(ValueVector other)

Description copied from interface: ValueVector

Exchange state with another value vector of the same type. Used to implement look-ahead writers.

Specified by:

exchange in interface ValueVector

Overrides:

exchange in class BaseDataValueVector