<dependency>
            <groupId>org.mapstruct</groupId>
            <artifactId>mapstruct</artifactId>
            <version>1.3.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.mapstruct</groupId>
            <artifactId>mapstruct-processor</artifactId>
            <version>1.3.0.Final</version>
            <scope>provided</scope>
        </dependency>

public interface CommonConverter {
    @Named("formatDateString")
    default String formatDateString(Date date){
        if(date == null){
            return null;
        return DateUtils.formatDateString(date);
    @Named("formatStringDate")
    default Date formatStringDate(String dateStr){
        if(StringUtils.isEmpty(dateStr)){
            return null;
        return DateUtils.formatStringDate(dateStr);
    @Named("convertTimestampToString")
    default String convertTimestampToString(Long date) {
        if (date == null || date.equals(0L)){
            return StringUtils.EMPTY;
        return DateUtils.convertTimeToDateStr(date, 0);
}

@Mapper(componentModel = "spring")
public interface EmployeeEventConverter extends CommonConverter{
    @Mappings({
            @Mapping(source = "claimDate", target = "claimDate", qualifiedByName = "formatDateString"),
            @Mapping(source = "eventStartDate", target = "eventStartDate", qualifiedByName = "formatDateString"),
            //@Mapping(source = "target", target = "targetAsString", qualifiedByName = "formatTargetString"),