@Override
public final BaseResponse<?> handle(
JsonPath jsonPath, RequestParams requestParams, RequestBody requestBody) throws Exception {
String resourceName = jsonPath.getResourceName();
PathIds resourceIds = jsonPath.getIds();
RegistryEntry registryEntry = resourceRegistry.getEntry(resourceName);
if (registryEntry == null) {
throw new ResourceNotFoundException(resourceName);
}
if (requestBody == null) {
throw new RequestBodyNotFoundException(HttpMethod.POST, resourceName);
}
Serializable castedResourceId = getResourceId(resourceIds, registryEntry);
ResourceField relationshipField =
registryEntry
.getResourceInformation()
.findRelationshipFieldByName(jsonPath.getElementName());
if (relationshipField == null) {
throw new ResourceFieldNotFoundException(jsonPath.getElementName());
}
ResourceRepository resourceRepository = registryEntry.getResourceRepository();
@SuppressWarnings("unchecked")
Object resource = resourceRepository.findOne(castedResourceId, requestParams);
Class<?> baseRelationshipFieldClass = relationshipField.getType();
Class<?> relationshipFieldClass =
Generics.getResourceClass(relationshipField.getGenericType(), baseRelationshipFieldClass);
@SuppressWarnings("unchecked")
Class<? extends Serializable> relationshipIdType =
(Class<? extends Serializable>)
resourceRegistry
.getEntry(relationshipFieldClass)
.getResourceInformation()
.getIdField()
.getType();
RelationshipRepository relationshipRepositoryForClass =
registryEntry.getRelationshipRepositoryForClass(relationshipFieldClass);
if (Iterable.class.isAssignableFrom(baseRelationshipFieldClass)) {
if (!requestBody.isMultiple()) {
throw new RequestBodyException(HttpMethod.POST, resourceName, "Non-multiple data in body");
}
Iterable<DataBody> dataBodies = requestBody.getMultipleData();
processToManyRelationship(
resource,
relationshipIdType,
jsonPath.getElementName(),
dataBodies,
relationshipRepositoryForClass);
} else {
if (requestBody.isMultiple()) {
throw new RequestBodyException(HttpMethod.POST, resourceName, "Multiple data in body");
}
DataBody dataBody = requestBody.getSingleData();
processToOneRelationship(
resource,
relationshipIdType,
jsonPath.getElementName(),
dataBody,
relationshipRepositoryForClass);
}
MetaInformation metaInformation =
getMetaInformation(resourceRepository, Collections.singletonList(resource), requestParams);
return new ResourceResponse(metaInformation);
}
@Override
public final boolean isAcceptable(JsonPath jsonPath, String requestType) {
return !jsonPath.isCollection()
&& jsonPath instanceof RelationshipsPath
&& method().name().equals(requestType);
}