Package com.kenshoo.pl.entity.spi

Interface FieldValueSupplier<T>

Type Parameters:

T - type of the field whose value is being supplied

All Superinterfaces:

FetchEntityFields

All Known Implementing Classes:

FixedFieldValueSupplier

public interface FieldValueSupplier<T>
extends FetchEntityFields

A "delayed" supplier of the new value for a field that decides on the value given the current state. For example, a logic to increment the current value by 10% can be implemented by implementing this interface. The supply(CurrentEntityState) method is going to be called after the current state has been fetched from the database.

See Also:

ChangeEntityCommand.set(EntityField, FieldValueSupplier)

Method Summary

Modifier and Type	Method	Description
static <OLD_VAL,NEW_VAL> FieldValueSupplier<NEW_VAL>	fromOldValue(EntityField<?,OLD_VAL> field, java.util.function.Function<OLD_VAL,NEW_VAL> func)
static <T1,T2,RES> FieldValueSupplier<RES>	fromValues(EntityField<?,T1> field1, EntityField<?,T2> field2, java.util.function.BiFunction<T1,T2,RES> func)
T	supply(CurrentEntityState currentState)	Returns the new value for a field given an existing entity

Methods inherited from interface com.kenshoo.pl.entity.spi.FetchEntityFields

fetchFields

Method Detail

supply

T supply(CurrentEntityState currentState)
  throws ValidationException,
         NotSuppliedException

Returns the new value for a field given an existing entity

Parameters:

currentState - entity before the change

Returns:

new field value

Throws:

ValidationException - if the supposed change is invalid

NotSuppliedException - if the supplier doesn't want to change the current value

fromOldValue

static <OLD_VAL,NEW_VAL> FieldValueSupplier<NEW_VAL> fromOldValue(EntityField<?,OLD_VAL> field,
                                                                        java.util.function.Function<OLD_VAL,NEW_VAL> func)

fromValues

static <T1,T2,RES> FieldValueSupplier<RES> fromValues(EntityField<?,T1> field1,
                                                                  EntityField<?,T2> field2,
                                                                  java.util.function.BiFunction<T1,T2,RES> func)