Package org.apache.druid.query.aggregation.any

Class NumericAnyBufferAggregator<TSelector extends BaseNullableColumnValueSelector>

java.lang.Object

org.apache.druid.query.aggregation.any.NumericAnyBufferAggregator<TSelector>

All Implemented Interfaces:

BufferAggregator, HotLoopCallee

Direct Known Subclasses:

DoubleAnyBufferAggregator, FloatAnyBufferAggregator, LongAnyBufferAggregator

public abstract class NumericAnyBufferAggregator<TSelector extends BaseNullableColumnValueSelector>
extends Object
implements BufferAggregator

Base type for buffer based 'any' aggregator for primitive numeric column selectors

Constructor Summary

Constructors

Constructor	Description
NumericAnyBufferAggregator(TSelector valueSelector)

Method Summary

Modifier and Type	Method	Description
void	aggregate(ByteBuffer buf, int position)	Aggregates metric values into the given aggregate byte representation Implementations of this method must read in the aggregate value from the buffer at the given position, aggregate the next element of data and write the updated aggregate value back into the buffer.
void	close()	Release any resources used by the aggregator.
void	init(ByteBuffer buf, int position)	Initializes the buffer location Implementations of this method must initialize the byte buffer at the given position Implementations must not change the position, limit or mark of the given buffer This method must not exceed the number of bytes returned by AggregatorFactory.getMaxIntermediateSizeWithNulls() in the corresponding AggregatorFactory
void	inspectRuntimeShape(RuntimeShapeInspector inspector)	Implementations of this method should call inspector.visit() with all fields of this class, which meet two conditions: 1.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.query.aggregation.BufferAggregator

get, getDouble, getFloat, getLong, isNull, relocate

Constructor Detail

NumericAnyBufferAggregator

public NumericAnyBufferAggregator(TSelector valueSelector)

Method Detail

init

public void init(ByteBuffer buf,
                 int position)

Description copied from interface: BufferAggregator

Initializes the buffer location Implementations of this method must initialize the byte buffer at the given position Implementations must not change the position, limit or mark of the given buffer This method must not exceed the number of bytes returned by AggregatorFactory.getMaxIntermediateSizeWithNulls() in the corresponding AggregatorFactory

Specified by:

init in interface BufferAggregator

Parameters:

buf - byte buffer to initialize

position - offset within the byte buffer for initialization

aggregate

public void aggregate(ByteBuffer buf,
                      int position)

Description copied from interface: BufferAggregator

Aggregates metric values into the given aggregate byte representation Implementations of this method must read in the aggregate value from the buffer at the given position, aggregate the next element of data and write the updated aggregate value back into the buffer. Implementations must not change the position, limit or mark of the given buffer

Specified by:

aggregate in interface BufferAggregator

Parameters:

buf - byte buffer storing the byte array representation of the aggregate

position - offset within the byte buffer at which the current aggregate value is stored

close

public void close()

Description copied from interface: BufferAggregator

Release any resources used by the aggregator. The aggregator may be reused after this call, by calling BufferAggregator.init(ByteBuffer, int) followed by other methods as normal. This call would be more properly named "reset", but we use the name "close" to improve compatibility with existing aggregator implementations in extensions.

Specified by:

close in interface BufferAggregator

inspectRuntimeShape

public void inspectRuntimeShape(RuntimeShapeInspector inspector)

Description copied from interface: BufferAggregator

Implementations of this method should call inspector.visit() with all fields of this class, which meet two conditions: 1. They are used in methods of this class, annotated with CalledFromHotLoop 2. They are either: a. Nullable objects b. Instances of HotLoopCallee c. Objects, which don't always have a specific class in runtime. For example, a field of type Set could be HashSet or TreeSet in runtime, depending on how this instance (the instance on which inspectRuntimeShape() is called) is configured. d. ByteBuffer or similar objects, where byte order matters e. boolean flags, affecting branch taking f. Arrays of objects, meeting any of conditions a-e.

The default implementation inspects nothing. Classes that implement BufferAggregator are encouraged to override this method, following the specification of HotLoopCallee.inspectRuntimeShape(org.apache.druid.query.monomorphicprocessing.RuntimeShapeInspector).

Specified by:

inspectRuntimeShape in interface BufferAggregator

Specified by:

inspectRuntimeShape in interface HotLoopCallee