Package io.activej.aggregation.measure

Class Measure

java.lang.Object

io.activej.aggregation.measure.Measure

Direct Known Subclasses:

MeasureCount, MeasureHyperLogLog, MeasureMax, MeasureMin, MeasureSum, MeasureUnion

public abstract class Measure
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected final FieldType	fieldType

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Measure(FieldType fieldType)

Method Summary

Modifier and Type	Method	Description
abstract Expression	accumulate(Variable accumulator, Variable nextValue)
final FieldType	getFieldType()
abstract Expression	initAccumulatorWithAccumulator(Variable accumulator, Expression firstAccumulator)
abstract Expression	initAccumulatorWithValue(Variable accumulator, Variable firstValue)
abstract Expression	reduce(Variable accumulator, Variable nextAccumulator)
abstract Expression	valueOfAccumulator(Expression accumulator)
abstract Expression	zeroAccumulator(Variable accumulator)

Methods inherited from class java.lang.Object

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

Field Details

fieldType

protected final FieldType fieldType

Constructor Details

Measure

protected Measure(FieldType fieldType)

Method Details

getFieldType

public final FieldType getFieldType()

valueOfAccumulator

public abstract Expression valueOfAccumulator(Expression accumulator)

zeroAccumulator

public abstract Expression zeroAccumulator(Variable accumulator)

initAccumulatorWithAccumulator

public abstract Expression initAccumulatorWithAccumulator(Variable accumulator,
 Expression firstAccumulator)

initAccumulatorWithValue

public abstract Expression initAccumulatorWithValue(Variable accumulator,
 Variable firstValue)

reduce

public abstract Expression reduce(Variable accumulator,
 Variable nextAccumulator)

accumulate

public abstract Expression accumulate(Variable accumulator,
 Variable nextValue)