How can get the value of multiple key values (Map inside of map) from the postman
{
"message_key": {
"device_id": "12548652",
"message": "Y5482lsdfkOjEyNDUysdfsdfMTc1sdfOTM3MjU=",
"messageType": "Text"
}
}
Actually I want to bind value of message_key with domain to validate every properties.
I have found the answer e.g:
DTO:
public #Data class MessageKey {
#JsonProperty("device_id")
private String deviceId;
#JsonProperty("message")
private String message;
#JsonProperty("messageType")
private String messageType;
}
Controller:
public void test(#RequestBody Map<String, MessageKey> bodyParameters) {
MessageKey messageKey = bodyParameters.get("message_key");
System.out.println(messageKey);
}
Related
What is the best way to do patch mapping on object like this:
#Data
public class UnifiedOfferEntity {
private String companyName;
private String city;
private String title;
private Set<SkillEntity> skills;
}
In entity I have many to many realtion. I did method for update where I send map<fieldName, value> and it works properly until I am trying to put set to the request body.
public UnifiedOfferEntity patchEntity(String id, Map<Object, Object> fields) {
UnifiedOfferEntity unifiedOfferEntity = getEntityById(id);
fields.forEach((key, value) -> {
Field field = ReflectionUtils.findField(UnifiedOfferEntity.class, (String) key);
field.setAccessible(true);
ReflectionUtils.setField(field, unifiedOfferEntity, value);
});
return unifiedOfferEntity;
}
I am getting:
java.lang.IllegalArgumentException: Can not set java.util.Set field com.example.jobfinder.entity.UnifiedOfferEntity.seniority to java.util.ArrayList
have you thought in this approach:
public UnifiedOfferEntity patchEntity(String id, Map<Object, Object> fields) {
UnifiedOfferEntity unifiedOfferEntity = getEntityById(id);
enhanceUnitedOfferEntity(unifiedOfferEntity,fields);
return unifiedOfferEntity;
}
where the method would manually populate the objet based on keys as constants.. or another object...
private void enhanceUnitedOfferEntity(UnifiedOfferEntity unifiedOfferEntity, Map<Object, Object> fields){
fields.forEach((k, v) ->
switch(k) {
case "COMPANY_NAME":
unifiedOfferEntity.setCompanyName(v);
case "CITY":
unifiedOfferEntity.setCity(v);
case "TITLE":
unifiedOfferEntity.setTitle(v);
break;
case "SKILLS":
unifiedOfferEntity.setSkills(v);
break;
default:
});
}
I have two Json objects like :
Object 1
{
"value": {
"data": [
"John",
"Justin",
"Tom"
],
"isGraduated": false
}
}
Object 2
{
"value": {
"data": {
"info": {
"background": {
"primarySchool" : "A school",
"univeristy": "X univeristy"
},
"name": "John",
"gender": "male",
"dayOfBirth": "1995-04-24"
}
},
"isGraduated": false
}
}
How can I deserialize the data field to list of strings or class(I've already declared) by using Jackson?
Edit
Add class Info declaration.
public class Info {
#JsonProperty("background")
private BackGround backGround;
#JsonProperty("name")
private String name;
#JsonProperty("gender")
private String gender;
#JsonProperty("dayOfBirth")
private String dayOfBirth;
public static class BackGround {
#JsonProperty("primarySchool")
private String primarySchool;
#JsonProperty("univeristy")
private String univeristy;
}
}
Looking at your JSON objects, there is no way you can figure out what will be there in data parameter. So you can use JsonNode as type for data parameter.
Note: This is the object hierarchy I have created to represent JSON objects
#ToString
class Wrapper {
private Value value;
// getter & setter
}
#ToString
class Value {
private JsonNode data;
private Boolean isGraduated;
// getter & setter
}
#ToString
class Data {
private Info info;
// getter & setter
}
#ToString
class Info {
private Background background;
private String name;
private String gender;
private String dayOfBirth;
// getter & setter
#ToString
static class Background {
private String primarySchool;
private String univeristy;
// getter & setter
}
}
Then you can check the node type before deserialize between List<String> and Info.calss like this,
JsonNodeType type = value.getValue().getData().getNodeType();
You will see type = JsonNodeType.ARRAY if the json object is type 1 and type = JsonNodeType.OBJECT if the json object is type 2.
Check this exaple,
public class Main {
public static void main(String[] args) throws IOException {
// String s = "{\"value\":{\"data\":[\"John\",\"Justin\",\"Tom\"],\"isGraduated\":false}}";
String s = "{\"value\":{\"data\":{\"info\":{\"background\":{\"primarySchool\":\"A school\",\"univeristy\":\"X univeristy\"},\"name\":\"John\",\"gender\":\"male\",\"dayOfBirth\":\"1995-04-24\"}},\"isGraduated\":false}}";
ObjectMapper om = new ObjectMapper();
Wrapper wrapper = om.readValue(s, Wrapper.class);
JsonNodeType type = wrapper.getValue().getData().getNodeType();
if (type == JsonNodeType.ARRAY) {
List<String> data = om.convertValue(wrapper.getValue().getData(), new TypeReference<List<String>>() {});
System.out.println(data);
} else if (type == JsonNodeType.OBJECT) {
Data data = om.convertValue(wrapper.getValue().getData(), Data.class);
System.out.println(data);
}
}
}
Not the general approach but approach for your specific case
ObjectMapper mapper = new ObjectMapper();
ObjectNode root = (ObjectNode) mapper.readTree(jsonContent);
JsonNode data = root.get("value").get("data");
if (data.has("info")) {
Info result = mapper.convertValue(data.get("info"), Info.class);
// handle result as Info instance
} else {
List<String> result = mapper.convertValue(data, new TypeReference<List<String>>() {});
// handle result as list of strings
}
I'm using Spring Boot 1.5.3, Spring Data REST, HATEOAS.
I've a simple entity model:
#Entity
public class User extends AbstractEntity implements UserDetails {
private static final long serialVersionUID = 5745401123028683585L;
public static final PasswordEncoder PASSWORD_ENCODER = new BCryptPasswordEncoder();
#NotNull(message = "The name of the user cannot be blank")
#Column(nullable = false)
private String name;
/** CONTACT INFORMATION **/
private String landlinePhone;
private String mobilePhone;
#NotNull(message = "The username cannot be blank")
#Column(nullable = false, unique = true)
private String username;
#Email(message = "The email address is not valid")
private String email;
#JsonIgnore
private String password;
#Column(nullable = false)
private String timeZone = "Europe/Rome";
#JsonIgnore
private LocalDateTime lastPasswordResetDate;
#Column(nullable = false, columnDefinition = "BOOLEAN default true")
private boolean enabled = true;
#Type(type = "json")
#Column(columnDefinition = "json")
private Roles[] roles = new Roles[] {};
and my enum Roles is:
public enum Roles {
ROLE_ADMIN, ROLE_USER, ROLE_MANAGER, ROLE_TECH;
#JsonCreator
public static Roles create(String value) {
if (value == null) {
throw new IllegalArgumentException();
}
for (Roles v : values()) {
if (value.equals(v.toString())) {
return v;
}
}
throw new IllegalArgumentException();
}
}
I'm creating a client in Angular 4. Spring Data REST is great and expose repository easily return my model HATEOAS compliant:
{
"_embedded": {
"users": [
{
"name": "Administrator",
"username": "admin",
"roles": [
"Amministratore"
],
"activeWorkSession": "",
"_links": {
"self": {
"href": "http://localhost:8080/api/v1/users/1"
},
"user": {
"href": "http://localhost:8080/api/v1/users/1{?projection}",
"templated": true
}
}
},
Like you can see I'm also translating via rest-messages.properties the value of my enums. Great!
My Angular page now needs the complete lists of roles (enums). I've some question:
understand the better way for the server to return the list of roles
how to return this list
My first attemp was to create a RepositoryRestController in order to take advantage of what Spring Data REST offers.
#RepositoryRestController
#RequestMapping(path = "/api/v1")
public class UserController {
#Autowired
private EntityLinks entityLinks;
#RequestMapping(method = RequestMethod.GET, path = "/users/roles", produces = "application/json")
public Resource<Roles> findRoles() {
Resource<Roles> resource = new Resource<>(Roles.ROLE_ADMIN);
return resource;
}
Unfortunately, for some reason, the call to this methods return a 404 error. I debugged and the resource is created correctly, so I guess the problem is somewhere in the JSON conversion.
how to return this list?
#RepositoryRestController
#RequestMapping("/roles")
public class RoleController {
#GetMapping
public ResponseEntity<?> getAllRoles() {
List<Resource<Roles>> content = new ArrayList<>();
content.addAll(Arrays.asList(
new Resource<>(Roles.ROLE1 /*, Optional Links */),
new Resource<>(Roles.ROLE2 /*, Optional Links */)));
return ResponseEntity.ok(new Resources<>(content /*, Optional Links */));
}
}
I was playing around with this and have found a couple of ways to do it.
Assume you have a front end form that wants to display a combo box containing priorities for a single Todo such as High, Medium, Low. The form needs to know the primary key or id which is the enum value in this instance and the value should be the readable formatted value the combo box should display.
If you wish to customize the json response in 1 place only such as a single endpoint then I found this useful. The secret sauce is using the value object PriorityValue to allow you to rename the json field through #Relation.
public enum Priority {
HIGH("High"),
NORMAL("Normal"),
LOW("Low");
private final String description;
Priority(String description) {
this.description = description;
}
public String getDescription() {
return description;
}
public static List<Priority> orderedValues = new ArrayList<>();
static {
orderedValues.addAll(Arrays.asList(Priority.values()));
}
}
#RepositoryRestController
#RequestMapping(value="/")
public class PriorityController {
#Relation(collectionRelation = "priorities")
#JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY)
private class PriorityValue {
private String id;
private String value;
public PriorityValue(String id,
String value) {
this.id = id;
this.value = value;
}
}
#GetMapping(value = "/api/priorities", produces = MediaTypes.HAL_JSON_VALUE)
public ResponseEntity<Resources<PriorityValue>> getPriorities() {
List<PriorityValue> priorities = Priority.orderedValues.stream()
.map(p -> new PriorityValue(p.name(), p.getDescription()))
.collect(Collectors.toList());
Resources<PriorityValue> resources = new Resources<>(priorities);
resources.add(linkTo(methodOn(PriorityController.class).getPriorities()).withSelfRel());
return ResponseEntity.ok(resources);
}
}
Another approach is to use a custom JsonSerializer. The only issue using this is everywhere a Priority enum is serialized you will end up using this format which may not be what you want.
#JsonSerialize(using = PrioritySerializer.class)
#Relation(collectionRelation = "priorities")
public enum Priority {
HIGH("High"),
NORMAL("Normal"),
LOW("Low");
private final String description;
Priority(String description) {
this.description = description;
}
public String getDescription() {
return description;
}
public static List<Priority> orderedValues = new ArrayList<>();
static {
orderedValues.addAll(Arrays.asList(Priority.values()));
}
}
#RepositoryRestController
#RequestMapping(value="/api")
public class PriorityController {
#GetMapping(value = "/priorities", produces = MediaTypes.HAL_JSON_VALUE)
public ResponseEntity<Resources<Priority>> getPriorities() {
Resources<Priority> resources = new Resources<>(Priority.orderedValues);
resources.add(linkTo(methodOn(PriorityController.class).getPriorities()).withSelfRel());
return ResponseEntity.ok(resources);
}
}
public class PrioritySerializer extends JsonSerializer<Priority> {
#Override
public void serialize(Priority priority,
JsonGenerator generator,
SerializerProvider serializerProvider)
throws IOException, JsonProcessingException {
generator.writeStartObject();
generator.writeFieldName("id");
generator.writeString(priority.name());
generator.writeFieldName("value");
generator.writeString(priority.getDescription());
generator.writeEndObject();
}
}
The final json response from http://localhost:8080/api/priorities
{
"_embedded": {
"priorities": [
{
"id": "HIGH",
"value": "High"
},
{
"id": "NORMAL",
"value": "Normal"
},
{
"id": "LOW",
"value": "Low"
}
]
},
"_links": {
"self": {
"href": "http://localhost:8080/api/priorities"
}
}
}
Hello all here is what i have:
StockController.java
#RestController
public class StockController {
#Autowired
private StockRepository repository;
#RequestMapping(value = "stockmanagement/stock")
public ResponseEntity<?> addStock(#RequestBody String stock
) {
System.out.println(stock);
return new ResponseEntity<>(HttpStatus.OK);
}
when I make a request like so using chrome advanced rest extension :
Raw Headers
Content-Type: application/json
Raw Payload
{"stock": {"productId": 2, "expiryAndQuantity" : {}, "id": 0}}
It works fine in that out comes a string of json
However when i try to replace String stock with Stock stock where stock looks like this:
public class Stock {
#Id
private String id;
private String productId;
private Map<LocalDateTime, Integer> expiryAndQuantity;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getProductId() {
return productId;
}
public void setProductId(String productId) {
this.productId = productId;
}
public Map<LocalDateTime, Integer> getExpiryAndQuantity() {
return expiryAndQuantity;
}
public void setExpiryAndQuantity(Map<LocalDateTime, Integer> expiryAndQuantity) {
this.expiryAndQuantity = expiryAndQuantity;
}
#Override
public String toString() {
return String.format(
""
);
}
}
I get an error where by the following is fed back to me:
"status": 415
"error": "Unsupported Media Type"
"exception": "org.springframework.web.HttpMediaTypeNotSupportedException"
"message": "Content type 'application/json;charset=UTF-8' not supported"
"path": "/stockmanagement/stock"
My question is; how do i create a request which maps to my Stock object.
You can try with #JsonRootName annotation, by default Spring serialize using no root name value. like this:
{"productId": 2, "expiryAndQuantity" : {}, "id": 0}
But if you want that your serialization has a rootname you need to use #JsonRootName annotation.
#JsonRootName(value = "Stock")
And it'll produce something like this
{"Stock": {"productId": 2, "expiryAndQuantity" : {}, "id": 0}}
You can see more here
http://www.baeldung.com/jackson-annotations
instead of accepting a String Accept a Stock object.and accept it from a post request than having a get request
#RequestMapping(value = "stockmanagement/stock",method=RequestMethod.POST)
public ResponseEntity<?> addStock(#RequestBody Stock stock){
}
and your request should be sent like this
{
"productId": 2
,"expiryAndQuantity" : null
,"id": 0
}
all parameter names should be equal to the objects filed names,since spring has jackson binders on class path and object will be created inside the controller method. if you are planning on passing different parameters from the post request you can use
#JsonProperty("pid")
private String productId;
on the field name.
I have pojo like this:
public class Test implements java.io.Serializable {
private static final long serialVersionUID = 1L;
private String hash;
private java.util.Hashtable<Integer, Long> myTempTable;
public java.util.Hashtable<Integer, Long> getMyTempTable() {
return this.myTempTable;
}
public void setMyTempTable(java.util.Hashtable<Integer, Long> myTempTable) { this.myTempTable = myTempTable; }
//And some few variables
}
In response I get this POJO in JSON format but while converting this JSON to "Test" java object like this.
gson.fromJson(tempString, Test.class);
It is giving error as
java.lang.IllegalArgumentException: Can not set java.util.Hashtable field <package_name>.Temp.myTempTable to java.util.LinkedHashMap
Why GSON is converting HashTable to LinkedHashMap?
And does this error means?
UPDATE: JSON File as
{
"hash": "abc",
"myTempTable": {
"1": 30065833999,
"2": 34364325903,
"3": 536872959
}
}
For converting an Object to JSON String.
public static <T> String convertObjectToStringJson(T someObject, Type type) {
Gson mGson = new Gson();
String strJson = mGson.toJson(someObject, type);
return strJson;
}
For converting a JSON String to an Object.
public static <T> T getObjectFromJson(String json, Type type) {
Gson mGson = new Gson();
if (json != null) {
if (json.isEmpty()) {
return null;
}
}
return mGson.fromJson(json, type);
}
where
Type is type of your Object.
ex:
for object:
new TypeToken<YOUR_POJO>(){}.getType();
for list:
new TypeToken<List<YOUR_POJO>>(){}.getType();