Consider the following POJOs:
public class SchedulePayload {
public String name;
public String scheduler;
public PeriodPayload notificationPeriod;
public PeriodPayload schedulePeriod;
}
private class Lecture {
public ZonedDateTime start;
public ZonedDateTime end;
}
public class XmlSchedule {
public String scheduleName;
public String schedulerName;
public DateTime notificationFrom;
public DateTime notificationTo;
public DateTime scheduleFrom;
public DateTime scheduleTo;
}
public class PeriodPayload {
public DateTime start;
public DateTime finish;
}
Using MapStruct, I created a mapper that maps XmlSchedule
to a SchedulePayload
. Due to "business" "logic", I need to constrain notificationPeriod
and schedulePeriod
to a Lecture
's start
and end
field values. Here is what I've come up to, using another class:
@Mapper(imports = { NotificationPeriodHelper.class })
public interface ISchedulePayloadMapper
{
@Mappings({
@Mapping(target = "name", source = "scheduleName"),
@Mapping(target = "scheduler", source = "schedulerName"),
@Mapping(target = "notificationPeriod", expression = "java(NotificationPeriodHelper.getConstrainedPeriod(xmlSchedule, notificationFrom, notificationTo))"),
@Mapping(target = "schedulePeriod", expression = "java(NotificationPeriodHelper.getConstrainedPeriod(xmlSchedule, scheduleFrom, scheduleTo))")
})
SchedulePayload map(XmlSchedule xmlSchedule, Lecture lecture);
}
Is there any way this can be achieved in another way (i.e. another mapper, decorators, etc.)? How can I pass multiple values (xmlSchedule, lecture) to a mapper?
What you can do is create an @AfterMapping
method to populate those parts manually:
@Mapper
public abstract class SchedulePayloadMapper
{
@Mappings({
@Mapping(target = "name", source = "scheduleName"),
@Mapping(target = "scheduler", source = "schedulerName"),
@Mapping(target = "notificationPeriod", expression = "java(NotificationPeriodHelper.getConstrainedPeriod(xmlSchedule, notificationFrom, notificationTo))"),
@Mapping(target = "schedulePeriod", expression = "java(NotificationPeriodHelper.getConstrainedPeriod(xmlSchedule, scheduleFrom, scheduleTo))")
})
public abstract SchedulePayload map(XmlSchedule xmlSchedule, Lecture lecture);
@AfterMapping
protected void addPeriods(@MappingTarget SchedulePayload result, XmlSchedule xmlSchedule, Lecture lecture) {
result.setNotificationPeriod(..);
result.setSchedulePeriod(..);
}
}
Alternatively, you can place the @AfterMapping
method in another class that is referenced in @Mapper(uses = ..)
or you can use a Decorator (using the mechanisms MapStruct provides, or of your dependency injection framework if you use one).
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