Package org.apache.nifi.attribute.expression.language.evaluation.reduce

Class CountEvaluator

java.lang.Object

org.apache.nifi.attribute.expression.language.evaluation.WholeNumberEvaluator

org.apache.nifi.attribute.expression.language.evaluation.reduce.CountEvaluator

All Implemented Interfaces:

Evaluator<Long>, ReduceEvaluator<Long>

public class CountEvaluator
extends WholeNumberEvaluator
implements ReduceEvaluator<Long>

Field Summary

Fields

Modifier and Type	Field	Description
private final Evaluator<?>	subjectEvaluator

Constructor Summary

Constructors

Constructor	Description
CountEvaluator(Evaluator<?> subjectEvaluator)

Method Summary

Modifier and Type	Method	Description
QueryResult<Long>	evaluate(EvaluationContext evaluationContext)
Evaluator<?>	getSubjectEvaluator()

Methods inherited from class org.apache.nifi.attribute.expression.language.evaluation.WholeNumberEvaluator

getEvaluationsRemaining, getResultType, getToken, setToken

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.nifi.attribute.expression.language.evaluation.Evaluator

getEvaluationsRemaining, getResultType, getToken, setToken

Field Details

subjectEvaluator

private final Evaluator<?> subjectEvaluator

Constructor Details

CountEvaluator

public CountEvaluator(Evaluator<?> subjectEvaluator)

Method Details

evaluate

public QueryResult<Long> evaluate(EvaluationContext evaluationContext)

Specified by:

evaluate in interface Evaluator<Long>

getSubjectEvaluator

public Evaluator<?> getSubjectEvaluator()

Specified by:

getSubjectEvaluator in interface Evaluator<Long>