Package ch.tocco.nice2.persist.core.api.exec.tasks2

Class AggregateTasks.SimpleSum

java.lang.Object

ch.tocco.nice2.persist.core.api.exec.tasks2.AggregateTasks.SimpleSum

All Implemented Interfaces:

OptionalTask<Iterable<Entity>,BigDecimal>, PersistTask<Iterable<Entity>,BigDecimal>, AggregateTasks.AggregateTask<BigDecimal>

Enclosing class:

AggregateTasks

public static class AggregateTasks.SimpleSum
extends Object
implements OptionalTask<Iterable<Entity>,BigDecimal>, AggregateTasks.AggregateTask<BigDecimal>

Uses a given field name to obtain the value of that field of each entity in the list to compute the sum. The field must point to a numeric value.

Constructor Summary

Constructors

Constructor	Description
SimpleSum(String fieldname)

Method Summary

Modifier and Type	Method	Description
BigDecimal	doRun(Iterable<Entity> input, CommandContext ctx)
PersistTask<EntityList,BigDecimal>	fromEntityList()
static PersistTask<EntityList,BigDecimal>	fromEntityList(String fieldname)
static AggregateTasks.SimpleSum	fromIterable(String fieldname)
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface ch.tocco.nice2.persist.core.api.exec.OptionalTask

run

Methods inherited from interface ch.tocco.nice2.persist.core.api.exec.PersistTask

andThenDo, compose, compose2, composeWhen, discardResult, expand, expand, getDescription, ifElse, logTime, orWhen, orWhenNot, passWhen, passWhenNot, skipErrors, unwrap

Constructor Details

SimpleSum

public SimpleSum(String fieldname)

Method Details

fromEntityList

public static PersistTask<EntityList,BigDecimal> fromEntityList(String fieldname)

fromIterable

public static AggregateTasks.SimpleSum fromIterable(String fieldname)

doRun

public BigDecimal doRun(Iterable<Entity> input,
 CommandContext ctx)
                 throws Exception

Specified by:

doRun in interface OptionalTask<Iterable<Entity>,BigDecimal>

Throws:

Exception

fromEntityList

public PersistTask<EntityList,BigDecimal> fromEntityList()

Specified by:

fromEntityList in interface AggregateTasks.AggregateTask<BigDecimal>

toString

public String toString()

Overrides:

toString in class Object