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/*
* Copyright MapStruct Authors.
*
* Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
*/
package org.mapstruct;
import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.mapstruct.control.MappingControl;
import static org.mapstruct.NullValueCheckStrategy.ON_IMPLICIT_CONVERSION;
/**
* Configures the mapping between two bean types.
*
* Either {@link #resultType()}, {@link #qualifiedBy()} or {@link #nullValueMappingStrategy()} must be specified.
*
* Example: Determining the result type
*
* // When result types have an inheritance relation, selecting either mapping method {@link Mapping} or factory method
* // {@link BeanMapping} can be become ambiguous. Parameter {@link BeanMapping#resultType()} can be used.
* public class FruitFactory {
* public Apple createApple() {
* return new Apple();
* }
* public Orange createOrange() {
* return new Orange();
* }
* }
* @Mapper(uses = FruitFactory.class)
* public interface FruitMapper {
* @BeanMapping(resultType = Apple.class)
* Fruit toFruit(FruitDto fruitDto);
* }
*
*
* // generates
* public class FruitMapperImpl implements FruitMapper {
* @Override
* public Fruit toFruit(FruitDto fruitDto) {
* Apple fruit = fruitFactory.createApple();
* // ...
* }
* }
*
*
* @author Sjaak Derksen
*/
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.CLASS)
public @interface BeanMapping {
/**
* Specifies the result type of the factory method to be used in case several factory methods qualify.
*
* @return the resultType to select
*/
Class resultType() default void.class;
/**
* A qualifier can be specified to aid the selection process of a suitable factory method or filtering applicable
* {@code @}{@link BeforeMapping} / {@code @}{@link AfterMapping} methods. This is useful in case multiple factory
* method (hand written of internal) qualify and result in an 'Ambiguous factory methods' error.
*
* A qualifier is a custom annotation and can be placed on either a hand written mapper class or a method.
*
* @return the qualifiers
* @see Qualifier
*/
Class[] qualifiedBy() default {};
/**
* Similar to {@link #qualifiedBy()}, but used in combination with {@code @}{@link Named} in case no custom
* qualifier annotation is defined.
*
* @return the qualifiers
* @see Named
*/
String[] qualifiedByName() default { };
/**
* The strategy to be applied when {@code null} is passed as source bean argument value to this bean mapping. If no
* strategy is configured, the strategy given via {@link MapperConfig#nullValueMappingStrategy()} or
* {@link Mapper#nullValueMappingStrategy()} will be applied, using {@link NullValueMappingStrategy#RETURN_NULL}
* by default.
*
* @return The strategy to be applied when {@code null} is passed as source value to the methods of this mapping.
*/
NullValueMappingStrategy nullValueMappingStrategy() default NullValueMappingStrategy.RETURN_NULL;
/**
* The strategy to be applied when a source bean property is {@code null} or not present. If no strategy is
* configured, the strategy given via {@link MapperConfig#nullValuePropertyMappingStrategy()} or
* {@link Mapper#nullValuePropertyMappingStrategy()} will be applied,
* {@link NullValuePropertyMappingStrategy#SET_TO_NULL} will be used by default.
*
* @since 1.3
*
* @return The strategy to be applied when {@code null} is passed as source property value or the source property
* is not present.
*/
NullValuePropertyMappingStrategy nullValuePropertyMappingStrategy()
default NullValuePropertyMappingStrategy.SET_TO_NULL;
/**
* Determines when to include a null check on the source property value of a bean mapping.
*
* Can be overridden by the one on {@link MapperConfig}, {@link Mapper} or {@link Mapping}.
*
* @return strategy how to do null checking
*/
NullValueCheckStrategy nullValueCheckStrategy() default ON_IMPLICIT_CONVERSION;
/**
* Default ignore all mappings. All mappings have to be defined manually. No automatic mapping will take place. No
* warning will be issued on missing target properties.
*
* @return The ignore strategy (default false).
*
* @since 1.3
*/
boolean ignoreByDefault() default false;
/**
* Unmapped source properties to be ignored. This could be used when {@link ReportingPolicy#WARN}
* or {@link ReportingPolicy#ERROR} is used for {@link Mapper#unmappedSourcePolicy()} or
* {@link MapperConfig#unmappedSourcePolicy()}. Listed properties will be ignored when composing the unmapped
* source properties report.
*
* NOTE: This does not support ignoring nested source properties
*
* @return The source properties that should be ignored when performing a report
*
* @since 1.3
*/
String[] ignoreUnmappedSourceProperties() default {};
/**
* The information that should be used for the builder mappings. This can be used to define custom build methods
* for the builder strategy that one uses.
*
* If no builder is defined the builder given via {@link MapperConfig#builder()} or {@link Mapper#builder()}
* will be applied.
*
* NOTE: In case no builder is defined here, in {@link Mapper} or {@link MapperConfig} and there is a single
* build method, then that method would be used.
*
* If the builder is defined and there is a single method that does not match the name of the finisher than
* a compile error will occurs
*
* @return the builder information for the method level
*
* @since 1.3
*/
Builder builder() default @Builder;
/**
* Allows detailed control over the mapping process.
*
* @return the mapping control
*
* @since 1.4
*
* @see org.mapstruct.control.DeepClone
* @see org.mapstruct.control.NoComplexMapping
* @see org.mapstruct.control.MappingControl
*/
Class mappingControl() default MappingControl.class;
}