Add extra method to deserialize JSON to PaginationData<T>

pull/9/head
Hammy 3 years ago
parent 773e726acc
commit 761b651fd7

@ -4,10 +4,10 @@ import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType; import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.ObjectMapper;
import me.goudham.domain.pagination.PaginationData;
import me.goudham.domain.series.Series; import me.goudham.domain.series.Series;
import me.goudham.exception.APIMapperException;
import me.goudham.domain.series.FilteredSeries;
import me.goudham.domain.waifu.Waifu; import me.goudham.domain.waifu.Waifu;
import me.goudham.exception.APIMapperException;
import java.util.List; import java.util.List;
@ -40,7 +40,7 @@ class APIMapper {
if (statusCode == 200) { if (statusCode == 200) {
try { try {
String data = getJsonTree(body); String data = getData(body);
newModel = objectMapper.readValue(data, model); newModel = objectMapper.readValue(data, model);
} catch (JsonProcessingException jpe) { } catch (JsonProcessingException jpe) {
throwAPIMapperException(jpe); throwAPIMapperException(jpe);
@ -52,22 +52,22 @@ class APIMapper {
/** /**
* Using the given {@code model}, {@link ObjectMapper} deserializes the given Json * Using the given {@code model}, {@link ObjectMapper} deserializes the given Json
* into a Java POJO. This method enables support for retrieving {@link List} of entities * into a Java POJO. This method enables support for retrieving {@link List} of models
* *
* @param <T> List of entities to be returned. E.g {@link List} of {@link FilteredSeries}
* @param result The result of the previous API response * @param result The result of the previous API response
* @param model The actual class of the given model. E.g {@link Waifu#getClass()} * @param model The actual class of the given model. E.g {@link Waifu#getClass()}
* @param <T> The type of model to be returned. E.g {@link Waifu} or {@link Series}
* @return {@link Response} * @return {@link Response}
* @throws APIMapperException If {@link ObjectMapper} is not able to deserialize JSON to Java POJO properly * @throws APIMapperException If {@link ObjectMapper} is not able to deserialize JSON to Java POJO properly
*/ */
<T> Response<List<T>> deserialize(Result result, JavaType model) throws APIMapperException { <T> Response<List<T>> deserializeToList(Result result, JavaType model) throws APIMapperException {
Integer statusCode = result.getStatusCode(); Integer statusCode = result.getStatusCode();
String body = result.getBody(); String body = result.getBody();
List<T> listOfModels = null; List<T> listOfModels = null;
if (statusCode == 200) { if (statusCode == 200) {
try { try {
String data = getJsonTree(body); String data = getData(body);
listOfModels = objectMapper.readValue(data, model); listOfModels = objectMapper.readValue(data, model);
} catch (JsonProcessingException jpe) { } catch (JsonProcessingException jpe) {
throwAPIMapperException(jpe); throwAPIMapperException(jpe);
@ -77,18 +77,42 @@ class APIMapper {
return new Response<>(statusCode, body, listOfModels); return new Response<>(statusCode, body, listOfModels);
} }
/**
* Using the given {@code model}, {@link ObjectMapper} deserializes the given Json
* into a Java POJO. This method enables support for retrieving {@link PaginationData} of specific models
*
* @param result The result of the previous API response
* @param model The actual class of the given model. E.g {@link Waifu#getClass()}
* @param <T> The type of model to be returned. E.g {@link Waifu} or {@link Series}
* @return {@link Response}
* @throws APIMapperException If {@link ObjectMapper} is not able to deserialize JSON to Java POJO properly
*/
<T> Response<PaginationData<T>> deserializeToPaginationData(Result result, JavaType model) throws APIMapperException {
Integer statusCode = result.getStatusCode();
String body = result.getBody();
PaginationData<T> newModel = null;
if (statusCode == 200) {
try {
newModel = objectMapper.readValue(body, model);
} catch (JsonProcessingException jpe) {
throwAPIMapperException(jpe);
}
}
return new Response<>(statusCode, body, newModel);
}
/** /**
* Helper method for reducing duplicate code in {@code deserialize()} * Helper method for reducing duplicate code in {@code deserialize()}
* and {@code deserializeToList()} * and {@code deserializeToList()}
* <br>
* Returns the proper json data to deserialize
* *
* @param jsonBody jsonBody returned by the API * @param jsonBody jsonBody returned by the API
* @return {@link String} * @return {@link String} The proper json data to deserialize
* @throws JsonProcessingException If {@link ObjectMapper} is not able to * @throws JsonProcessingException If {@link ObjectMapper} is not able to
* read the given {@code jsonBody} * read the given {@code jsonBody}
*/ */
private String getJsonTree(String jsonBody) throws JsonProcessingException { private String getData(String jsonBody) throws JsonProcessingException {
JsonNode parent = objectMapper.readTree(jsonBody); JsonNode parent = objectMapper.readTree(jsonBody);
return parent.get("data").toString(); return parent.get("data").toString();
} }

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