Jackson dynamic property names

Question

I would like serialize an object such that one of the fields will be named differently based on the type of the field. For example:

public class Response {
          


        

Answer 1

my own solution.

@Data
@EqualsAndHashCode
@ToString
@JsonSerialize(using = ElementsListBean.CustomSerializer.class)
public class ElementsListBean {

    public ElementsListBean()
    {
    }

    public ElementsListBean(final String fieldName, final List elements)
    {
        this.fieldName = fieldName;
        this.elements = elements;
    }

    private String fieldName;

    private List elements;

    public int length()
    {
        return (this.elements != null) ? this.elements.size() : 0;
    }

    private static class CustomSerializer extends JsonSerializer