Java deep copy bean different types

Question

I am using SpringBoot with Java 1.8.

I have two objects that I would like to copy one to the other. I thought I could use BeanUtils.copyProprties and copy each level of every bean, but because going forward I am going to have to copy many objects, I want to create one generic method to do a deep copy of many objects.

Also, the reason why BeanUtils.copyProprties won't work for me, is because I am copying beans with the same name but different object types.

For example, I want to copy a DTO to an Entity.

DTO

public class QuoteRequestDTO {

    protected TravelRequirementDTO travel;
    ...

and

public class TravelRequirementDTO {
       protected String value;
        ...

Entity

public class QuoteRequest {
    protected TravelRequirement travel;
    ...

and

public class TravelRequirement {
       protected String value;
        ...

Copy Utility

I have tried the following:

import com.fasterxml.jackson.databind.ObjectMapper;

public class CopyUtils {

    public static <T>T deepCopy(Object sourceObject, T targetObject) {
        ObjectMapper mapper = new ObjectMapper();
        T targetBean = (T) mapper.convertValue(sourceObject, targetObject.getClass());
        return targetBean;
    }
}

Usage:

public void getQuote(QuoteRequestDTO quoteRequestDTO) {
    QuoteRequest quoteRequest = new QuoteRequest();
    quoteRequest = CopyUtils.deepCopy(quoteRequestDTO, quoteRequest);

Error

It gets the following error:

No serializer found for class com.clubtravel.restosgi.dto.transit.TimeFrameDTO and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.clubtravel.restosgi.dto.transit.availability.QuoteRequestDTO["travel"]

Question

Is there a way I can write a generic utility method to deep copy objects that have member variables with the same names (but different object types)?