元帅GraphQl执行结果对Java对象

Question

我搜索了很多东西，但是不幸的是，任何建议的解决方案都适合我。

我将描述要点：

1. 我的休息项目建立在OpenAPI和 OpenApi Maven Generator插件上。
2. 通过JAXRS-Spec生成器I生成应用程序DTO。
3. 通过graphQl-nodejs-express-server Generator，我生产GraphQl架构文件。
4. REST Web服务作为可选的GraphQl查询接受，以过滤/减少答案的冗长。

GraphQl executionResult.getData（）方法返回linkedHashmap的实例。

问题是：如何将上述linkedhashmap降低到相应的dto？

预先感谢您！

------ 编辑 ----

我希望改进和简化我的问题。

我有以下DTO：

public class ResponseDTO {
    private Integer id;
    private String description;
}

我通过GraphQl过滤：

GraphQLSchema graphQLSchema = getGraphQLSchema();
String        graphqlQuery  = "{ ResponseDTO { id } }";

ExecutionInput builder = ExecutionInput
    .newExecutionInput()
    .query(graphqlQuery)
    .build();

ExecutionResult executionResult = GraphQL
    .newGraphQL(graphQLSchema)
    .build()
    .execute(builder);
    
LinkedHashMap graphQLData = executionResult.getData();

//TODO How can I convert 'graphQLData' to a `ResponseDTO` instance?

ResponseDTO responseDTO = ???;

Answer 1

我终于找到了解决方案：

LinkedHashMap<String, Object> dataMap      = executionResult.getData();
String                        dataKey      = dataMap.keySet().toArray()[0].toString();
HashMap<String, Object>       dataValue    = (HashMap<String, Object>)dataMap.get(dataKey);

fixTypeId(
    dataContext.getClass(),
    dataValue
);

ObjectMapper             objectMapper = new ObjectMapper();

objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);            objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
objectMapper.registerModule(new JavaTimeModule());
objectMapper.registerModule(new JaxbAnnotationModule());
objectMapper.setDateFormat(new StdDateFormat().withColonInTimeZone(true));           objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);

String dataJSON = objectMapper.writeValueAsString(dataValue);

ResponseDTO responseDTO = objectMapper.readValue(
    dataJSON,
    ResponseDTO.class
);

其中fixTypeid是：

@SuppressWarnings("unchecked")
private void fixTypeId(Class<?> refClass, Map<String, Object> dataMap) {
    JsonTypeInfo typeInfoAnnotation = refClass.getDeclaredAnnotation(JsonTypeInfo.class);
    JsonTypeName typeNameAnnotation = refClass.getDeclaredAnnotation(JsonTypeName.class);

    if ((null != typeInfoAnnotation) && (null != typeNameAnnotation)) {
        String typeInfo = typeInfoAnnotation.property();
        String typeName = typeNameAnnotation.value();

        log.trace(
            "Adding \"{} = {}\" type identifier.",
            typeInfo,
            typeName
        );

        dataMap.put(typeInfo, typeName);
    }

    dataMap
        .entrySet()
        .stream()
        .filter(entry -> (entry.getValue() instanceof Map))
        .forEach(entry -> {
            Field field = null;

            try {
                field = refClass.getDeclaredField(entry.getKey());
            } catch (NoSuchFieldException exception) {
                log.error(exception.getMessage(), exception);
                throw new RuntimeException(exception);
            }

            fixTypeId(
                field.getType(),
                (Map<String, Object>)entry.getValue()
            );
        });
}