com.speedment.runtime.field.expression

Interface FieldMapper<ENTITY,T,R,NON_NULLABLE extends Expression<ENTITY>,MAPPER>

Type Parameters:

ENTITY - the entity type

T - the column type mapped from

R - the type mapped to

NON_NULLABLE - the expression type obtained if the nullability of this expression is handled

MAPPER - functional interface type returned by getMapper()

All Superinterfaces:

Expression<ENTITY>, Function<ENTITY,R>, ToNullable<ENTITY,R,NON_NULLABLE>

All Known Subinterfaces:

FieldToBigDecimal<ENTITY,T>, FieldToBoolean<ENTITY,T>, FieldToByte<ENTITY,T>, FieldToChar<ENTITY,T>, FieldToDouble<ENTITY,T>, FieldToEnum<ENTITY,T,E>, FieldToFloat<ENTITY,T>, FieldToInt<ENTITY,T>, FieldToLong<ENTITY,T>, FieldToShort<ENTITY,T>, FieldToString<ENTITY,T>

public interface FieldMapper<ENTITY,T,R,NON_NULLABLE extends Expression<ENTITY>,MAPPER>
extends Expression<ENTITY>, ToNullable<ENTITY,R,NON_NULLABLE>

Specialized expression that takes the value of a particular Speedment field and maps it to a specific type.

Since:

3.1.0

Author:

Emil Forslund

Method Summary

Modifier and Type	Method and Description
ReferenceField<ENTITY,?,T>	getField() The field that is being mapped.
MAPPER	getMapper() Returns the functional interface implementation that is used when doing the mapping.

Methods inherited from interface com.speedment.runtime.compute.trait.ToNullable

isNotNull, isNotNull, isNull, isNull, orElse, orElseGet, orThrow

Methods inherited from interface java.util.function.Function

andThen, apply, compose, identity

Methods inherited from interface com.speedment.runtime.compute.expression.Expression

expressionType

Method Detail

getField

ReferenceField<ENTITY,?,T> getField()

The field that is being mapped.

Returns:

the field

getMapper

MAPPER getMapper()

Returns the functional interface implementation that is used when doing the mapping. The returned object must implement one of the following interfaces:

• ToByteFunction
• ToShortFunction
• ToIntFunction
• ToLongFunction
• ToDoubleFunction
• ToFloatFunction
• ToCharFunction
• ToBooleanFunction
• Function

The first generic type should be the boxed type returned by the getters of the field. If the mapper implements Function, then the returning type must be either String, Enum or BigDecimal.

Returns:

the mapper to use