Custom Convertor for a particular field

[jat...@gmail.com]

I was wondering if the @Field or any other annotation supports defining which function (custom convertor) to use to create this fields value from the source object (let's say a field is based on multiple source fields for whatever reason).

Consider I have the following two classes (this is a simple example, but I did face this issue on an existing project where I was trying to plug in Selma instead of handcoded mappings)

public class Measurement {

private BigDecimal temp;

private BigDecimal humidity;

//setters and getters

}

public class MeasurementDto {

    private double temperature;

    private double celsiusTemp;

    private double fahrenTemp;

    private double humidity;

//setters and getters

    }

With a mapping class like this:

@Mapper(withCustomFields = {

        @Field({ "com.jatinst.selma.demo.model.MeasurementDto.temp",

                "com.jatinst.selma.demo.model.Measurement.temperature" }),

        @Field({ "com.jatinst.selma.demo.model.MeasurementDto.celsiustemp",

                "com.jatinst.selma.demo.model.Measurement.temperature" }),

        @Field({ "com.jatinst.selma.demo.model.MeasurementDto.fahrentemp",

                "com.jatinst.selma.demo.model.Measurement.temperature" }) }, withCustom = { BigDecimalToDoubleMapper.class })

public interface MeasurementMapper {

    public MeasurementDto getMeasurement(Measurement measure);

}

Now, there is no way I can specify that fahrenTemp = (some constant) * Measurement.temperature . I can obviously make it a different type and use a Custom Mapper, but what if the destination field was a combination of two source fields? Dozer or Orika will support this by just specifying a custom convertor at the individual field level. Is there any way to do this in Selma?

The source code for this example can be found at: https://github.com/jatinst/code-samples/tree/master/selma