I want to have a single Mapper
class with both create
and update
methods. The generated code for create method is fine, but in case of update, I want to set the properties in the target, only if they are not null in the source.
How do I do it with mapStruct
?
The confusion arises because the nullValueMappingStrategy
is being defined at Mapper
or Mapping
level.
If I set that value at Mapper
level, it will be applied to all methods, including create and update.
@Mapper // If I define null strategy here, it will be applied to all methods
public interface AmcPkgMapper {
AmcPkgMapper MAPPER = Mappers.getMapper(AmcPkgMapper.class);
AmcPackage create(AmcPackageRequest amcPackageRequest);
// How to define the null strategy here??
void update(AmcPackageRequest amcPackageRequest, @MappingTarget AmcPackage amcPackage);
}
And if I set it on the method with Mapping
, then it expects me to define a target
object, for which I probably need a wrapper object and somehow map all the internal properties inside that.
@Mapping(target = "amcPackage", nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
void update(AmcPackageRequest amcPackageRequest, @MappingTarget AmcPackageWrapper amcPackageWrapper);
With the above method, the generated code looks as below, which isn't going inside amcPackage
to set all properties.
@Override
public void update(AmcPackageRequest amcPackageRequest, AmcPackageWrapper amcPackageWrapper) {
if ( amcPackageRequest == null ) {
return;
}
// nothing is mapped actually!!
}
Is there a simple way to do it without creating separate mapper classes for create and update?
Got it done with @BeanMapping
@BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE,
nullValueCheckStrategy = NullValueCheckStrategy.ALWAYS)
void update(AmcPackageRequest amcPackageRequest, @MappingTarget AmcPackage amcPackage);
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