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@MappedSuperclass
@Data
@EqualsAndHashCode(callSuper = true)
public abstract class JpaToscaWithTypeAndStringProperties<T extends ToscaWithTypeAndObjectProperties>
        extends JpaToscaEntityType<T> implements PfAuthorative<T> {

    .............................

     @Convert(converter = StringToMapConverter.class)
     @Column(columnDefinition = "jsonbjson")
     private Map<@NotNull String, @NotNull String> properties;

     .............................
 }

@Converter(autoApply = true)
public final class StringToMapConverter implements AttributeConverter<Map<String, ? extends Object>, String> {

    private static final Coder coder = new StandardCoder();

    @Override
    public String convertToDatabaseColumn(Map<String, ? extends Object> map) {
        try {
            return map == null ? null : coder.encode(map);
        } catch (CoderException e) {
            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, e.getMessage(), e);
        }
    }

    @Override
    public Map<String, ? extends Object> convertToEntityAttribute(String dbData) {
        if (dbData == null) {
            return Map.of();
        }
        try {
            return coder.decode(dbData, Map.class);
        } catch (CoderException e) {
            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, e.getMessage(), e);
        }
    }
}