com.speedment.runtime.compute.trait

Interface HasMapIfPresent<T,MAPPER,RESULT extends HasMapIfPresent<T,MAPPER,RESULT>>

Type Parameters:

T - the input entity type

MAPPER - the functional interface used for mapping values

All Known Subinterfaces:

EnumField<ENTITY,D,E>, EnumForeignKeyField<ENTITY,D,E,FK>, FieldToBoolean<ENTITY,T>, FieldToByte<ENTITY,T>, FieldToDouble<ENTITY,T>, FieldToEnum<ENTITY,T,E>, FieldToFloat<ENTITY,T>, FieldToInt<ENTITY,T>, FieldToLong<ENTITY,T>, FieldToShort<ENTITY,T>, ToBooleanNullable<T>, ToByteNullable<T>, ToDoubleNullable<T>, ToEnumNullable<T,E>, ToFloatNullable<T>, ToIntNullable<T>, ToLongNullable<T>, ToShortNullable<T>

public interface HasMapIfPresent<T,MAPPER,RESULT extends HasMapIfPresent<T,MAPPER,RESULT>>

Trait for expressions that can be mapped to a new expression of the same type by supplying a mapping function. If the value is present in the original expression, then it will be present in the new one as well. If the result of the original expression is null, then the new expression will evaluate to null also.

Since:

3.1.0

Author:

Emil Forslund

Method Summary

Modifier and Type	Method and Description
RESULT	mapIfPresent(MAPPER mapper) Returns an expression for the value of this expression mapped using the specified mapping function.

Method Detail

mapIfPresent

RESULT mapIfPresent(MAPPER mapper)

Returns an expression for the value of this expression mapped using the specified mapping function. The input type remains the same.

Parameters:

mapper - the mapping function

Returns:

the mapped expression