HLTech / pact-gen

@Slf4j

final class BodySerializer {

    private BodySerializer() {

    }

    static JsonNode serializeBody(Body body, ObjectMapper objectMapper, PodamFactory podamFactory) {

        String serializedBody = null;

        JsonNode bodyJsonNode = null;

        try {

            if (body.getType() != null && !body.getType().equals(Void.TYPE)) {

                serializedBody = objectMapper.writeValueAsString(populateRequestObject(body, podamFactory));

                bodyJsonNode = objectMapper.readTree(serializedBody);

            }

        } catch (JsonProcessingException ex) {

            log.error("Unable to write {} to json. Original error message '{}'",

                body, ex.getMessage());

            throw new PactGenerationException("Unable to serialize body", ex);

        }

        return bodyJsonNode;

    }

    private static Object populateRequestObject(Body body, PodamFactory podamFactory) {

        Class<?>[] types = body.getGenericArgumentTypes().toArray(new Class<?>[0]);

        Object manufacturedPojo = Optional.class.equals(body.getType())

            ? podamFactory.manufacturePojo(types[0])

            : podamFactory.manufacturePojo(body.getType(), types);

        if (manufacturedPojo == null) {

            throw new PactGenerationException("Podam manufacturing failed");

        }

        return manufacturedPojo;