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An annotation processor for generating type-safe bean mappers

There is a newer version: 1.6.3

/*
 * 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.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Advises the code generator to apply the configuration (as given via {@link Mapping}, {@link IterableMapping} etc.)
 * from another mapping method (declared on the same mapper type) or prototype method (declared on a mapper config class
 * referenced via {@link Mapper#config()}) to the annotated method as well.
 * 
 * If no method can be identified unambiguously as configuration source (i.e. several candidate methods with matching
 * source and target type exist), the name of the method to inherit from must be specified via {@link #name()}.
 * 

 * {@link Mapping#expression()}, {@link Mapping#constant()}, {@link Mapping#defaultExpression()} and
 * {@link Mapping#defaultValue()} are not inverse inherited
 *
 * 

 * A typical use case is annotating an update method so it inherits all mappings from a corresponding "standard" mapping
 * method:
 *
 * 
 * 
 * @Mappings({
 *     @Mapping(target="make", source="brand"),
 *     @Mapping(target="seatCount", source="numberOfSeats")
 * })
 * CarDto carToCarDto(Car car);
 *
 * @InheritConfiguration
 * void updateCarDto(Car car, @MappingTarget CarDto carDto);
 * 
 * 
 *
 * @author Sjaak Derksen
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.CLASS)
public @interface InheritConfiguration {

    /**
     * The name of the mapping method to inherit the mappings from. Needs only to be specified in case more than one
     * method with matching source and target type exists.
     *
     * @return The name of the mapping method to inherit the mappings from.
     */
    String name() default "";
}