Java TypeReference类代码示例

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
private Map<String, String> populateDataFlows(Object item){
	Map<String, String> mapping = new HashMap<String, String>();
	LinkedHashMap<String,Object> linkedItem = (LinkedHashMap<String,Object>) item;
	ArrayList<LinkedHashMap>linkedMap = (ArrayList<LinkedHashMap>) linkedItem.get("item-metadata");
	String mappingAsString = null;
	for(LinkedHashMap hashmap : linkedMap){
		switch((String)hashmap.get("rel")){
		case "Mapping JSON": 
			mappingAsString = (String)hashmap.get("val");
			break;
		}
	}
	mappingAsString = mappingAsString.replaceAll( "\\\\\"","\"");
	ObjectMapper mapper = new ObjectMapper();
	try {
		mapping = mapper.readValue(mappingAsString, new TypeReference<Map<String, String>>(){});
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	return mapping;
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
@SystemControllerLog(description="权限管理-资源列表")
@RequestMapping(value = "/data")
@ResponseBody
public String data(String params,HttpSession session) {
	try {
		ObjectMapper om = new ObjectMapper();
		Map<String, Object> map = new HashMap<String, Object>();
		// 当前只查询管理员
		if (!StringUtils.isEmpty(params)) {
			// 参数处理
			map = om.readValue(params, new TypeReference<Map<String, Object>>() {});
		}
		PagerModel<Resource	> pg = resourceService.findPaginated(map);
		// 序列化查询结果为JSON
		Map<String, Object> result = new HashMap<String, Object>();
		result.put("total", pg.getTotal());
		result.put("rows", pg.getData());
		return om.writeValueAsString(result);
	} catch (Exception e) {
		e.printStackTrace();
		return "{ \"total\" : 0, \"rows\" : [] }";
	}
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
@Post("json")
public Map<String,Object> notify(String entity) throws Exception {
    List<StorageSourceNotification> notifications = null;
    ObjectMapper mapper = new ObjectMapper();
    notifications = 
        mapper.readValue(entity, 
                new TypeReference<List<StorageSourceNotification>>(){});
    
    IStorageSourceService storageSource = 
        (IStorageSourceService)getContext().getAttributes().
            get(IStorageSourceService.class.getCanonicalName());
    storageSource.notifyListeners(notifications);
    
    HashMap<String, Object> model = new HashMap<String,Object>();
    model.put("output", "OK");
    return model;
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
public NakadiEvent mapToNakadiEvent(final EventLog event) {
    final NakadiEvent nakadiEvent = new NakadiEvent();

    final NakadiMetadata metadata = new NakadiMetadata();
    metadata.setEid(convertToUUID(event.getId()));
    metadata.setOccuredAt(event.getCreated());
    metadata.setFlowId(event.getFlowId());
    nakadiEvent.setMetadata(metadata);

    HashMap<String, Object> payloadDTO;
    try {
        payloadDTO = objectMapper.readValue(event.getEventBodyData(), new TypeReference<LinkedHashMap<String, Object>>() { });
    } catch (IOException e) {
        log.error("An error occurred at JSON deserialization", e);
        throw new UncheckedIOException(e);
    }

    nakadiEvent.setData(payloadDTO);

    return nakadiEvent;
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
@StreamListener(target = Sink.INPUT)
@Transactional
public void messageReceived(String messageJson) throws Exception {
  Message<JsonNode> message = new ObjectMapper().readValue( //
      messageJson, //
      new TypeReference<Message<JsonNode>>() {});
  
  String type = "Event";
  if (message.getMessageType().endsWith("Command")) {
    type = "Command";
  }
  
  PastEvent event = new PastEvent( //
      type, //
      message.getMessageType(), //
      message.getTraceId(), //
      message.getSender(), //
      message.getPayload().toString());
  
  // save
  LogRepository.instance.addEvent(event);
  
  // and probably send to connected websocket (TODO: Not a good place for the code here!)
  simpMessageTemplate.convertAndSend("/topic/events", event);
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
/**
 * Handles incoming OrderPlacedEvents. 
 * 
 *  Using the conditional {@link StreamListener} from 
 * https://github.com/spring-cloud/spring-cloud-stream/blob/master/spring-cloud-stream-core-docs/src/main/asciidoc/spring-cloud-stream-overview.adoc
 * in a way close to what Axion
 *  would do (see e.g. https://dturanski.wordpress.com/2017/03/26/spring-cloud-stream-for-event-driven-architectures/)
 */
@StreamListener(target = Sink.INPUT, 
    condition="payload.messageType.toString()=='OrderPlacedEvent'")
@Transactional
public void orderPlacedReceived(String messageJson) throws JsonParseException, JsonMappingException, IOException {
  Message<Order> message = new ObjectMapper().readValue(messageJson, new TypeReference<Message<Order>>(){});
  Order order = message.getPayload();
  
  System.out.println("New order placed, start flow. " + order);
  
  // persist domain entity
  repository.persistOrder(order);    
  
  // and kick of a new flow instance
  camunda.getRuntimeService().createMessageCorrelation(message.getMessageType())
    .processInstanceBusinessKey(message.getTraceId())
    .setVariable("orderId", order.getId())
    .correlateWithResult();
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
@Test
public void testPrefer() throws IOException {
    final Response res = target(RESOURCE_PATH).request()
        .header("Prefer", "return=representation; include=\"" + Trellis.PreferServerManaged.getIRIString() + "\"")
        .accept("application/ld+json; profile=\"http://www.w3.org/ns/json-ld#compacted\"").get();

    assertEquals(OK, res.getStatusInfo());

    final String entity = IOUtils.toString((InputStream) res.getEntity(), UTF_8);
    final Map<String, Object> obj = MAPPER.readValue(entity, new TypeReference<Map<String, Object>>(){});

    assertTrue(obj.containsKey("@context"));
    assertTrue(obj.containsKey("title"));
    assertFalse(obj.containsKey("mode"));
    assertTrue(obj.containsKey("created"));

    assertEquals("A title", (String) obj.get("title"));
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
@Override
protected void mainFlow(UsecaseExecution<Parameters, InstagramResponse<List<User>>> execution) throws Exception {

	String endpoint = String.format(
			"https://api.instagram.com/v1/users/%s/follows?access_token=%s",
			execution.params.user_id,
			execution.params.access_token);

	URL url = new URL(endpoint);
	URLConnection connection = url.openConnection();
	InputStream is = connection.getInputStream();
	try {
		execution.result = MAPPER.readValue(is, new TypeReference<InstagramResponse<List<User>>>() {
		});
	} finally {
		is.close();
	}
	execution.result_type = UsecaseResultType.SUCCESS;
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
@Test
public void testCanGetJobInputs() throws IOException {
    final APIJobRequest req = REQUEST_AGAINST_FIRST_SPEC;

    final JobId jobId = generateAuthenticatedRequest(RULE, HTTP_JOBS_PATH)
            .post(json(req))
            .readEntity(APIJobCreatedResponse.class)
            .getId();

    final Response jobInputsResponse =
            generateAuthenticatedRequest(RULE, jobResourceSubpath(jobId + "/inputs"))
            .get();

    assertThat(jobInputsResponse.getStatus()).isEqualTo(OK);

    final String responseJson = jobInputsResponse.readEntity(String.class);

    final Map<JobExpectedInputId, JsonNode> inputsReturned =
            readJSON(responseJson, new TypeReference<Map<JobExpectedInputId, JsonNode>>() {});

    assertThat(inputsReturned).isEqualTo(req.getInputs());
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
private long processEvaluationFileForBuilding(long buildingId) throws Exception {

        mockMvc.perform(MockMvcRequestBuilders.fileUpload("/position/processEvalFiles")
                .file(evaluationFile)
                .param("buildingIdentifier", String.valueOf(buildingId)))
                .andExpect(status().isOk());

        ResultActions getEvalFileResultActions = mockMvc.perform(get("/position/getEvalFilesForBuildingId?" +
                "buildingIdentifier=" + buildingId));
        getEvalFileResultActions.andExpect(status().isOk());
        String getEvalFileResult = getEvalFileResultActions.andReturn().getResponse().getContentAsString();
        List<GetEvaluationFilesForBuilding> getEvaluationFilesForBuilding = (List<GetEvaluationFilesForBuilding>)
                this.objectMapper.readValue(getEvalFileResult, new TypeReference<List<GetEvaluationFilesForBuilding>>() {
                });
        assertTrue("The returned list of type " + GetEvaluationFilesForBuilding.class.getSimpleName() + " had an unexpected size.",
                getEvaluationFilesForBuilding.size() == 1);

        return getEvaluationFilesForBuilding.get(0).getId();

    }
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
@Override
public File deserializeResponse(String answer) throws TelegramApiRequestException {
    try {
        ApiResponse<File> result = OBJECT_MAPPER.readValue(answer,
                new TypeReference<ApiResponse<File>>(){});
        if (result.getOk()) {
            return result.getResult();
        } else {
            throw new TelegramApiRequestException("Error getting file", result);
        }
    } catch (IOException e) {
        throw new TelegramApiRequestException("Unable to deserialize response", e);
    }
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
@Test
public void shouldThrowIfAnExtraordinaryExceptionHappensWhenParsingAsGenericMap() throws Exception {
    JsonNode value = mock(ObjectNode.class);
    when(value.getNodeType()).thenReturn(JsonNodeType.OBJECT);

    JsonNodeClaim claim = (JsonNodeClaim) claimFromNode(value);
    JsonNodeClaim spiedClaim = spy(claim);
    ObjectMapper mockedMapper = mock(ObjectMapper.class);
    when(spiedClaim.getObjectMapper()).thenReturn(mockedMapper);
    JsonParser mockedParser = mock(JsonParser.class);
    when(mockedMapper.treeAsTokens(value)).thenReturn(mockedParser);
    when(mockedParser.readValueAs(ArgumentMatchers.any(TypeReference.class))).thenThrow(IOException.class);

    exception.expect(JWTDecodeException.class);
    spiedClaim.asMap();
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
public static List<EnvironmentVariable> getEnvironmentVariables(String response) {
	List<EnvironmentVariable> environmentVariables = new ArrayList<>();
	ObjectMapper mapper = new ObjectMapper();
	try {
		environmentVariables = mapper.readValue(response, new TypeReference<List<EnvironmentVariable>>() {
		});
	} catch (IOException e) {
		e.printStackTrace();
	}
	return environmentVariables;
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
public static <T> T fromString(String string, TypeReference<T> typeReference) {
    try {
        return OBJECT_MAPPER.readValue(string, typeReference);
    } catch (IOException e) {
        throw new IllegalArgumentException("The given string value: " + string + " cannot be transformed to Json object", e);
    }
}
 

import com.fasterxml.jackson.core.type.TypeReference; //导入依赖的package包/类
/**
 * json string convert to map with javaBean
 */
public static <T> Map<String, T> json2map(String jsonStr, Class<T> clazz)
        throws Exception {
    Map<String, Map<String, Object>> map = OBJECT_MAPPER.readValue(jsonStr,
            new TypeReference<Map<String, T>>() {
            });
    Map<String, T> result = new HashMap<String, T>();
    for (Map.Entry<String, Map<String, Object>> entry : map.entrySet()) {
        result.put(entry.getKey(), map2pojo(entry.getValue(), clazz));
    }
    return result;
}