io.github.linpeilie.annotations.ReverseAutoMapping Maven / Gradle / Ivy
package io.github.linpeilie.annotations;
import io.github.linpeilie.DefaultMapping;
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.BeanMapping;
import org.mapstruct.Condition;
import org.mapstruct.Mapper;
import org.mapstruct.MapperConfig;
import org.mapstruct.Named;
import org.mapstruct.NullValueCheckStrategy;
import org.mapstruct.NullValuePropertyMappingStrategy;
import org.mapstruct.Qualifier;
import org.mapstruct.control.MappingControl;
import static org.mapstruct.NullValueCheckStrategy.ON_IMPLICIT_CONVERSION;
/**
* 由目标类生成当前类的配置
*
* {@link AutoMapper} 的生成规则是由配置注解的当前类，生成与目标类之间的转换接口，所以其内部字段中的 {@link AutoMapping} 都是基于该条件来配置的。
* 虽然默认情况下会生成目标类到当前类的转换，但如果自定义配置的话，仍需要到目标类上面进行配置。
*
*
* 但现实情况中，可能会出现目标类，不能或者不建议增加配置注解，所以，这里提供一种在一种类上面自定义配置两个类转换的方式。 如果需要配置由目标类转换为配置注解的当前类具体转换逻辑的话，可以使用当前注解
*
*
* 需要注意的是，如果在当前类中配置了该注解信息，则在目标类中不能够再定义与该类转换相关的注解，例如{@code AutoMapper}、{@code AutoMapping}
*
*
* @author linpl
*/
@Target({ElementType.FIELD, ElementType.METHOD})
@Retention(RetentionPolicy.CLASS)
public @interface ReverseAutoMapping {
Class targetClass() default DefaultMapping.class;
/**
* 来源，默认取当前字段名称
* - 可以是当前类中的属性名
* - 也可以是属性名.属性名，例如：address.city.name
* @return 当前类中的属性
*/
String source() default "";
String target() default "";
String dateFormat() default "";
String numberFormat() default "";
String constant() default "";
String expression() default "";
String defaultExpression() default "";
String conditionExpression() default "";
boolean ignore() default false;
/**
* 默认值
* @return 当源属性为null时，设置的默认值
*/
String defaultValue() default "";
/**
* A qualifier can be specified to aid the selection process of a suitable mapper. This is useful in case multiple
* mapping methods (hand written or generated) qualify and thus would result in an 'Ambiguous mapping methods found'
* error. A qualifier is a custom annotation and can be placed on a hand written mapper class or a method.
*
* Note that {@link #defaultValue()} usage will also be converted using this qualifier.
*
* qualifier 可以置顶限定符来帮助选择合适的转换方法。qualifier 是一个自定义的注解，可以标注在 mapper 类或者方法上。
*
* Note that {@link #defaultValue()} usage will also be converted using this qualifier.
*
*
* @since 1.4.2
*
* @return the qualifiers
* @see Qualifier
*/
Class[] qualifiedBy() default { };
/**
* String-based form of qualifiers; When looking for a suitable mapping method for a given property, MapStruct will
* only consider those methods carrying directly or indirectly (i.e. on the class-level) a {@link Named} annotation
* for each of the specified qualifier names.
*
* Note that annotation-based qualifiers are generally preferable as they allow more easily to find references and
* are safe for refactorings, but name-based qualifiers can be a less verbose alternative when requiring a large
* number of qualifiers as no custom annotation types are needed.
*
* Note that {@link #defaultValue()} usage will also be converted using this qualifier.
*
* @since 1.4.0
*
* @return One or more qualifier name(s)
* @see Named
*/
String[] qualifiedByName() default {};
/**
* String-based form of qualifiers for condition / presence check methods;
* When looking for a suitable presence check method for a given property, MapStruct will
* only consider those methods carrying directly or indirectly (i.e. on the class-level) a {@link Named} annotation
* for each of the specified qualifier names.
*
* This is similar like {@link #qualifiedByName()} but it is only applied for {@link Condition} methods.
*
* Note that annotation-based qualifiers are generally preferable as they allow more easily to find references and
* are safe for refactorings, but name-based qualifiers can be a less verbose alternative when requiring a large
* number of qualifiers as no custom annotation types are needed.
*
*
* @since 1.4.0
*
* @return One or more qualifier name(s)
* @see #qualifiedByName()
* @see Named
*/
String[] conditionQualifiedByName() default {};
/**
* One or more properties of the result type on which the mapped property depends. The generated method
* implementation will invoke the setters of the result type ordered so that the given dependency relationship(s)
* are satisfied. Useful in case one property setter depends on the state of another property of the result type.
*
* An error will be raised in case a cycle in the dependency relationships is detected.
*
* @since 1.4.0
*
* @return the dependencies of the mapped property
*/
String[] dependsOn() default {};
/**
* Determines when to include a null check on the source property value of a bean mapping.
*
* Can be overridden by the one on {@link org.mapstruct.MapperConfig}, {@link Mapper} or {@link BeanMapping}.
*
* @since 1.4.2
*
* @return strategy how to do null checking
*/
NullValueCheckStrategy nullValueCheckStrategy() default ON_IMPLICIT_CONVERSION;
/**
* The strategy to be applied when the source property is {@code null} or not present. If no strategy is configured,
* the strategy given via {@link MapperConfig#nullValuePropertyMappingStrategy()},
* {@link BeanMapping#nullValuePropertyMappingStrategy()} or
* {@link Mapper#nullValuePropertyMappingStrategy()} will be applied.
*
* {@link NullValuePropertyMappingStrategy#SET_TO_NULL} will be used by default.
*
* @since 1.4.2
*
* @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;
/**
* Allows detailed control over the mapping process.
*
* @return the mapping control
*
* @since 1.4.2
*
* @see org.mapstruct.control.DeepClone
* @see org.mapstruct.control.NoComplexMapping
* @see org.mapstruct.control.MappingControl
*/
Class mappingControl() default MappingControl.class;
}