Package org.apache.druid.query.aggregation.firstlast

Class StringFirstLastVectorAggregator

java.lang.Object

org.apache.druid.query.aggregation.firstlast.FirstLastVectorAggregator<String,SerializablePairLongString>

org.apache.druid.query.aggregation.firstlast.StringFirstLastVectorAggregator

All Implemented Interfaces:

VectorAggregator

Direct Known Subclasses:

StringFirstVectorAggregator, StringLastVectorAggregator

public class StringFirstLastVectorAggregator
extends FirstLastVectorAggregator<String,SerializablePairLongString>

Field Summary

Fields inherited from class org.apache.druid.query.aggregation.firstlast.FirstLastVectorAggregator

NULLITY_OFFSET, VALUE_OFFSET

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	StringFirstLastVectorAggregator(VectorValueSelector timeSelector, VectorObjectSelector objectSelector, int maxStringBytes, SelectionPredicate selectionPredicate)

Method Summary

Modifier and Type	Method	Description
Object	get(ByteBuffer buf, int position)	Same as BufferAggregator.get(java.nio.ByteBuffer, int).
void	init(ByteBuffer buf, int position)	Same as BufferAggregator.init(java.nio.ByteBuffer, int).
protected void	putNull(ByteBuffer buf, int position, long time)
protected void	putValue(ByteBuffer buf, int position, long time, String value)	Sets the value at the position.
protected void	putValue(ByteBuffer buf, int position, long time, VectorValueSelector valueSelector, int index)	Sets the value represented by the valueSelector at the given index.
protected SerializablePairLongString	readPairFromVectorSelectors(boolean[] timeNullityVector, long[] timeVector, Object[] maybeFoldedObjects, int index)

Methods inherited from class org.apache.druid.query.aggregation.firstlast.FirstLastVectorAggregator

aggregate, aggregate, close

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.VectorAggregator

relocate

Constructor Details

StringFirstLastVectorAggregator

protected StringFirstLastVectorAggregator(@Nullable
 VectorValueSelector timeSelector,
 VectorObjectSelector objectSelector,
 int maxStringBytes,
 SelectionPredicate selectionPredicate)

Method Details

init

public void init(ByteBuffer buf,
 int position)

Description copied from interface: VectorAggregator

Same as BufferAggregator.init(java.nio.ByteBuffer, int).

get

@Nullable
public Object get(ByteBuffer buf,
 int position)

Description copied from interface: VectorAggregator

Same as BufferAggregator.get(java.nio.ByteBuffer, int).

putValue

protected void putValue(ByteBuffer buf,
 int position,
 long time,
 String value)

Description copied from class: FirstLastVectorAggregator

Sets the value at the position. Subclasses can assume that the value isn't null 'position' refers to the location where the value of the pair will get updated (as opposed to the beginning of the serialized pair) It is only used if objectSelector is supplied

Specified by:

putValue in class FirstLastVectorAggregator<String,SerializablePairLongString>

putValue

protected void putValue(ByteBuffer buf,
 int position,
 long time,
 VectorValueSelector valueSelector,
 int index)

Description copied from class: FirstLastVectorAggregator

Sets the value represented by the valueSelector at the given index. A slightly redundant method to FirstLastVectorAggregator.putValue(ByteBuffer, int, long, Object) to avoid autoboxing for the numeric types. Subclasses can assume that valueSelector.getNullVector[index] is false (i.e. the value represented at the index isn't null) It is used if valueSelector is supplied

Specified by:

putValue in class FirstLastVectorAggregator<String,SerializablePairLongString>

putNull

protected void putNull(ByteBuffer buf,
 int position,
 long time)

Specified by:

putNull in class FirstLastVectorAggregator<String,SerializablePairLongString>

readPairFromVectorSelectors

protected SerializablePairLongString readPairFromVectorSelectors(boolean[] timeNullityVector,
 long[] timeVector,
 Object[] maybeFoldedObjects,
 int index)

Specified by:

readPairFromVectorSelectors in class FirstLastVectorAggregator<String,SerializablePairLongString>