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org.springframework.orm.jpa.JpaSystemException: Error accessing field by reflection for persistent property

I am using Spring Boot (v 2.4.0) with Hibernate 5.4.24 and, when trying to get some information from my database, I keep getting this error message:
org.springframework.orm.jpa.JpaSystemException: Error accessing field [private int es.uc3m.orders.model.Shoppingcart.usID] by reflection for persistent property [es.uc3m.orders.model.Shoppingcart#usID] : 1; nested exception is org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private int es.uc3m.orders.model.Shoppingcart.usID] by reflection for persistent property [es.uc3m.orders.model.Shoppingcart#usID] : 1
It is kind of weird for me, because it only happens when I try to access the table Shoppingcart, since I can get informatin from the rest of the tables.
I also used the exact same entities with another project but, insetad of using Spring Boot, persistence was made with EntityManagers and it worked perfectly fine.
These are my entities:
Shoppingcart
#Entity
#NamedQuery(name="Shoppingcart.findAll", query="SELECT s FROM Shoppingcart s")
public class Shoppingcart implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int scID;
private int usID;
//bi-directional many-to-many association to Product
#ManyToMany
#JoinTable(
name="sc_has_product"
, joinColumns={
#JoinColumn(name="scID")
}
, inverseJoinColumns={
#JoinColumn(name="productID")
}
)
private List<Product> products;
//bi-directional one-to-one association to User
#OneToOne(mappedBy="shoppingcart")
private User user;
public Shoppingcart() {
}
public int getScID() {
return this.scID;
}
public void setScID(int scID) {
this.scID = scID;
}
public int getusID() {
return this.usID;
}
public void setusID(int usID) {
this.usID = usID;
}
public List<Product> getProducts() {
return this.products;
}
public void setProducts(List<Product> products) {
this.products = products;
}
public User getUser() {
return this.user;
}
public void setUser(User user) {
this.user = user;
}
public boolean isNull() {
return getProducts().isEmpty();
}
User
#Entity
#Table(name="users")
#NamedQuery(name="User.findAll", query="SELECT u FROM User u")
public class User implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private String address;
#Column(name="card_n")
private Long cardN;
private String city;
private String country;
private int cvv;
private String email;
private String exp;
private String name;
private String pass;
private String surname1;
private String surname2;
private String typeOfUser;
#Column(name="zip_code")
private int zipCode;
//bi-directional many-to-one association to Order
#OneToMany(mappedBy="user")
private List<Orders> orders;
//bi-directional many-to-one association to Product
#OneToMany(mappedBy="user")
private List<Product> products;
//bi-directional one-to-one association to Shoppingcart
#OneToOne(cascade=CascadeType.REMOVE)
#JoinColumn(name="ID", referencedColumnName="usID", insertable=false, updatable=false)
private Shoppingcart shoppingcart;
public User() {
}
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
public String getAddress() {
return this.address;
}
public void setAddress(String address) {
this.address = address;
}
public Long getCardN() {
return this.cardN;
}
public void setCardN(Long cardN) {
this.cardN = cardN;
}
public String getCity() {
return this.city;
}
public void setCity(String city) {
this.city = city;
}
public String getCountry() {
return this.country;
}
public void setCountry(String country) {
this.country = country;
}
public int getCvv() {
return this.cvv;
}
public void setCvv(int cvv) {
this.cvv = cvv;
}
public String getEmail() {
return this.email;
}
public void setEmail(String email) {
this.email = email;
}
public String getExp() {
return this.exp;
}
public void setExp(String exp) {
this.exp = exp;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public String getPass() {
return this.pass;
}
public void setPass(String pass) {
this.pass = pass;
}
public String getSurname1() {
return this.surname1;
}
public void setSurname1(String surname1) {
this.surname1 = surname1;
}
public String getSurname2() {
return this.surname2;
}
public void setSurname2(String surname2) {
this.surname2 = surname2;
}
public int getZipCode() {
return this.zipCode;
}
public void setZipCode(int zipCode) {
this.zipCode = zipCode;
}
public List<Orders> getOrders() {
return this.orders;
}
public void setOrders(List<Orders> orders) {
this.orders = orders;
}
public Orders addOrder(Orders order) {
getOrders().add(order);
order.setUser(this);
return order;
}
public Orders removeOrder(Orders order) {
getOrders().remove(order);
order.setUser(null);
return order;
}
public List<Product> getProducts() {
return this.products;
}
public void setProducts(List<Product> products) {
this.products = products;
}
public Product addProduct(Product product) {
getProducts().add(product);
product.setUser(this);
return product;
}
public Product removeProduct(Product product) {
getProducts().remove(product);
product.setUser(null);
return product;
}
public Shoppingcart getShoppingcart() {
return this.shoppingcart;
}
public void setShoppingcart(Shoppingcart shoppingcart) {
this.shoppingcart = shoppingcart;
}
public String getTypeOfUser() {
return typeOfUser;
}
public void setTypeOfUser(String typeOfUser) {
this.typeOfUser = typeOfUser;
}
}
This is the ShoppingcartDAO class:
public interface ShoppingCartDAO extends CrudRepository<Shoppingcart, Integer> {
#Query("SELECT s FROM Shoppingcart s JOIN User u ON u.id = s.usID AND u.id LIKE :id")
Shoppingcart findByUser(#Param("id") int id);
#Query("SELECT s FROM Shoppingcart s")
List<Shoppingcart> findAllShoppingCart();
}
And, finally, this is my ShoppingcartController class:
#RestController
#CrossOrigin
#EnableAutoConfiguration
public class ShoppingCartController {
#Autowired
ShoppingCartDAO scDAO;
#RequestMapping(value = "sc", method = RequestMethod.POST, produces = "application/json")
public ResponseEntity<?> assignShoppingCart(#RequestBody(required = true) Shoppingcart sc) {
try {
scDAO.save(sc);
return new ResponseEntity<Void>(HttpStatus.CREATED);
} catch(Exception e) {
return new ResponseEntity<Void>(HttpStatus.BAD_REQUEST);
}
}
#RequestMapping(value = "sc", method = RequestMethod.GET, produces = "application/json")
public ResponseEntity<?> getEveryShoppingCart() {
try {
List<Shoppingcart> sc = scDAO.findAllShoppingCart();
return new ResponseEntity<List<Shoppingcart>>(sc, (sc != null) ? HttpStatus.OK : HttpStatus.NOT_FOUND);
} catch(Exception e) {
System.out.println(e);
return new ResponseEntity<Void>(HttpStatus.BAD_REQUEST);
}
}
}
I am really going nuts as I can´t figure out what is going on with my code, so thank you in advance if you help me.

I finally fixed it. For those of you who are wondering how, I deleted the relationships between tables that I had, ending with:
Shoppingcart:
#Entity
public class Shoppingcart implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int scID;
#Column(name = "usID")
private Integer userID;
public Shoppingcart() {
}
public int getScID() {
return this.scID;
}
public void setScID(int scID) {
this.scID = scID;
}
public Integer getUserID() {
return userID;
}
public void setUserID(Integer userID) {
this.userID = userID;
}
Product:
#Entity
public class Product implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int productID;
private String category;
private String color;
private String description;
private String estadoProducto;
private String fecha;
private int orderID;
private String photo;
private double price;
private int seller;
private String sexo;
private String state = "Disponible";
private String talla;
private String title;
public Product() {
}
public int getProductID() {
return this.productID;
}
public void setProductID(int productID) {
this.productID = productID;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public String getColor() {
return this.color;
}
public void setColor(String color) {
this.color = color;
}
public String getDescription() {
return this.description;
}
public void setDescription(String description) {
this.description = description;
}
public String getEstadoProducto() {
return this.estadoProducto;
}
public void setEstadoProducto(String estadoProducto) {
this.estadoProducto = estadoProducto;
}
public String getFecha() {
return this.fecha;
}
public void setFecha(String fecha) {
this.fecha = fecha;
}
public String getPhoto() {
return this.photo;
}
public void setPhoto(String photo) {
this.photo = photo;
}
public double getPrice() {
return this.price;
}
public void setPrice(double price) {
this.price = price;
}
public String getSexo() {
return this.sexo;
}
public void setSexo(String sexo) {
this.sexo = sexo;
}
public String getState() {
return this.state;
}
public void setState(String state) {
this.state = state;
}
public String getTalla() {
return this.talla;
}
public void setTalla(String talla) {
this.talla = talla;
}
public String getTitle() {
return this.title;
}
public void setTitle(String title) {
this.title = title;
}
public int getOrderID() {
return orderID;
}
public void setOrderID(int orderID) {
this.orderID = orderID;
}
public int getSeller() {
return seller;
}
public void setSeller(int seller) {
this.seller = seller;
}
With this, everything worked fine, but don't ask me why, because I don't know it.

Your Getters/Setters are wrongly implemented.
Like :
Actual :
public int getusID() {
return this.usID;
}
Expected :
public int getUsID() {
return this.usID;
}
Same with setter

AWS lambda java request POJO attributes null

I am just creating a handler in java which accepts a POJO called as ProductsModel.
public ProductsResponseObject handleRequest(ProductsRequestObject productsRequestObject, Context arg1) {
ProductsResponseObject respObj = null;
ProductsService productsService = new ProductsService();
arg1.getLogger().log("inside ProductsHandler.handleRequest with reqtype " + productsRequestObject.getReqType());
switch (productsRequestObject.getReqType()) {
case 0:
respObj = productsService.addProduct(productsRequestObject);
break;
case 1:
respObj = productsService.updateProduct(productsRequestObject);
break;
default:
break;
}
return respObj;
}
But here inside the handler method, the attributes of request, reqType and productModel are null. Not sure y?
Request POJO:
public class ProductsRequestObject {
private int reqType;
private ProductsModel productsModel;
public int getReqType() {
return reqType;
}
public void setReqType(int reqType) {
this.reqType = reqType;
}
public ProductsModel getProductsModel() {
return productsModel;
}
public void setProductsModel(ProductsModel productsModel) {
this.productsModel = productsModel;
}
}
Model POJO:
public class ProductsModel {
private String id;
private String dealerMobNumber;
private String name;
private String description;
private String price;
#DynamoDBHashKey(attributeName = "Id")
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getDealerMobNumber() {
return dealerMobNumber;
}
public void setDealerMobNumber(String dealerMobNumber) {
this.dealerMobNumber = dealerMobNumber;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}

How to extract array of json inside an attribute of type List from an object

I am using Flickr API to get the information of images and returns the following JSON:
{"photos":{"page":1,"pages":60,"perpage":100,"total":"5964","photo":[{"id":"21577339501","owner":"85277110#N02","secret":"31e850dfeb","server":"5785","farm":6,"title":"P1390956","ispublic":1,"isfriend":0,"isfamily":0}, {"id":"21577287101","owner":"85277110#N02","secret":"412990658f","server":"611","farm":1,"title":"P1400012","ispublic":1,"isfriend":0,"isfamily":0}]
I use this code in the Spring controller to deserialize the JSON:
Collection<Photos> readValues = objectMapper.readValue(new URL(url), new TypeReference<Collection<Photos>>() { });
And returns the following error:
com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
How can I solve this problem? I didn't found solutions.
Photos.class:
public class Photos {
#JsonProperty("page")
private Integer page;
#JsonProperty("pages")
private Integer pages;
#JsonProperty("perpage")
private Integer perpage;
#JsonProperty("total")
private Integer total;
#JsonProperty("photo")
#JsonDeserialize(contentAs = Photo.class, as = ArrayList.class)
private List<Photo> photo;
public Photos() {}
public Photos(Integer page, Integer pages, Integer perpage, Integer total,
List<Photo> photo) {
super();
this.page = page;
this.pages = pages;
this.perpage = perpage;
this.total = total;
this.photo = photo;
}
public Photos(List<Photo> photo) {
super();
this.photo = photo;
}
public Integer getPage() {
return page;
}
public void setPage(Integer page) {
this.page = page;
}
public Integer getPages() {
return pages;
}
public void setPages(Integer pages) {
this.pages = pages;
}
public Integer getPerpage() {
return perpage;
}
public void setPerpage(Integer perpage) {
this.perpage = perpage;
}
public Integer getTotal() {
return total;
}
public void setTotal(Integer total) {
this.total = total;
}
public List<Photo> getPhoto() {
return photo;
}
public void setPhoto(List<Photo> photo) {
this.photo = photo;
}
}
Photo.class:
public class Photo {
#JsonProperty("id")
private Integer id;
#JsonProperty("owner")
private String owner;
#JsonProperty("secret")
private String secret;
#JsonProperty("server")
private Integer server;
#JsonProperty("farm")
private Integer farm;
#JsonProperty("title")
private String title;
#JsonProperty("ispublic")
private Boolean isPublic;
#JsonProperty("isfriend")
private Boolean isFriend;
#JsonProperty("isfamily")
private Boolean isFamily;
public Photo() { }
public Photo(Integer id, String owner, String secret, Integer server,
Integer farm, String title, Boolean isPublic, Boolean isFriend,
Boolean isFamily) {
super();
this.id = id;
this.owner = owner;
this.secret = secret;
this.server = server;
this.farm = farm;
this.title = title;
this.isPublic = isPublic;
this.isFriend = isFriend;
this.isFamily = isFamily;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getOwner() {
return owner;
}
public void setOwner(String owner) {
this.owner = owner;
}
public String getSecret() {
return secret;
}
public void setSecret(String secret) {
this.secret = secret;
}
public Integer getServer() {
return server;
}
public void setServer(Integer server) {
this.server = server;
}
public Integer getFarm() {
return farm;
}
public void setFarm(Integer farm) {
this.farm = farm;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public Boolean getIsPublic() {
return isPublic;
}
public void setIsPublic(Boolean isPublic) {
this.isPublic = isPublic;
}
public Boolean getIsFriend() {
return isFriend;
}
public void setIsFriend(Boolean isFriend) {
this.isFriend = isFriend;
}
public Boolean getIsFamily() {
return isFamily;
}
public void setIsFamily(Boolean isFamily) {
this.isFamily = isFamily;
}
}

The basic problem is that your json is not a Collection<Photos>, but a Map<String, Photos>, which has a single entry "photos" -> Photos instance.
I got your json to successfully deserialize by making the following changes...
A) Change the type being read:
Map<String, Photos> readValues = objectMapper.readValue(json, new TypeReference<Map<String, Photos>>() { });
Note that I read straight from a String (not a URL).
B) Change the type of Photo.id from Integer to Long, because your json has id values well exceeding max int size.
C) I added the missing two closing braces from your sample json to make it valid.
FYI, deserialization works with or without the #JsonDeserialize annotation on the List<Photo> photo field of Photos.
Here's some runnable code that works:
String json = "{\"photos\":{\"page\":1,\"pages\":60,\"perpage\":100,\"total\":\"5964\",\"photo\":[{\"id\":\"21577339501\",\"owner\":\"85277110#N02\",\"secret\":\"31e850dfeb\",\"server\":\"5785\",\"farm\":6,\"title\":\"P1390956\",\"ispublic\":1,\"isfriend\":0,\"isfamily\":0}, {\"id\":\"21577287101\",\"owner\":\"85277110#N02\",\"secret\":\"412990658f\",\"server\":\"611\",\"farm\":1,\"title\":\"P1400012\",\"ispublic\":1,\"isfriend\":0,\"isfamily\":0}]}}";
Map<String, Photos> readValues = new ObjectMapper().readValue(json, new TypeReference<Map<String, Photos>>() { });

How parcelable custom arraylist?

I have two classes which implement Parcelable. And objects of one of them I have to write to a list. First model:
public class Challenge implements Parcelable {
private long id;
#JsonProperty("max_volume")
private int maxVolume;
#JsonProperty("current_volume")
private int currentVolume;
private String name;
private String description;
#JsonProperty("max_count")
private int maxCount;
#JsonProperty("date_from")
private Date dateFrom;
#JsonProperty("date_to")
private Date dateTo;
#JsonProperty("create_time")
#JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm ZZZZ")
private Date createTime;
private ChallengeStatus status;
#JsonProperty("update_date")
#JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm ZZZZ")
private Date updateTime;
private ChallengeCategory category;
private Subject subject;
private ArrayList<User> userArrayList;
private int practice;
public double getProgress() {
return progress;
}
public void setProgress(double progress) {
this.progress = progress;
}
public int getPractice() {
return practice;
}
public void setPractice(int practice) {
this.practice = practice;
}
private double progress;
public Challenge() {
}
private Creator<User> creator;
protected Challenge(Parcel in) {
id = in.readLong();
maxVolume = in.readInt();
currentVolume = in.readInt();
name = in.readString();
description = in.readString();
maxCount = in.readInt();
// dateFrom = new Date(in.readLong());
// dateTo = new Date(in.readLong());
// createTime = new Date(in.readLong());
// status = ChallengeStatus.getEnum(in.readString());
// updateTime = new Date(in.readLong());
// category = ChallengeCategory.getEnum(in.readString());
subject = in.readParcelable(Subject.class.getClassLoader());
userArrayList = in.readTypedList(userArrayList, User.CREATOR);
}
public static final Creator<Challenge> CREATOR = new Creator<Challenge>() {
#Override
public Challenge createFromParcel(Parcel in) {
return new Challenge(in);
}
#Override
public Challenge[] newArray(int size) {
return new Challenge[size];
}
};
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public int getMaxVolume() {
return maxVolume;
}
public void setMaxVolume(int maxVolume) {
this.maxVolume = maxVolume;
}
public int getCurrentVolume() {
return currentVolume;
}
public void setCurrentVolume(int currentVolume) {
this.currentVolume = currentVolume;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public int getMaxCount() {
return maxCount;
}
public void setMaxCount(int maxCount) {
this.maxCount = maxCount;
}
public Date getDateFrom() {
return dateFrom;
}
public void setDateFrom(Date dateFrom) {
this.dateFrom = dateFrom;
}
public Date getDateTo() {
return dateTo;
}
public void setDateTo(Date dateTo) {
this.dateTo = dateTo;
}
public Date getCreateTime() {
return createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
public ChallengeStatus getStatus() {
return status;
}
public void setStatus(ChallengeStatus status) {
this.status = status;
}
public Date getUpdateTime() {
return updateTime;
}
public void setUpdateTime(Date updateTime) {
this.updateTime = updateTime;
}
public ChallengeCategory getCategory() {
return category;
}
public void setCategory(ChallengeCategory category) {
this.category = category;
}
public Subject getSubject() {
return subject;
}
public void setSubject(Subject subject) {
this.subject = subject;
}
#Override
public int describeContents() {
return 0;
}
public ArrayList<User> getUserArrayList() {
return userArrayList;
}
public void setUserArrayList(ArrayList<User> userArrayList) {
this.userArrayList = userArrayList;
}
public static Creator<Challenge> getCREATOR() {
return CREATOR;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeLong(id);
dest.writeInt(maxVolume);
dest.writeInt(currentVolume);
dest.writeString(name);
dest.writeString(description);
dest.writeInt(maxCount);
// dest.writeLong(dateFrom.getTime());
// dest.writeLong(dateTo.getTime());
// dest.writeLong(createTime.getTime());
// dest.writeString(status.toString());
// dest.writeLong(updateTime.getTime());
// dest.writeString(category.toString());
dest.writeParcelable(subject, flags);
dest.writeTypedList(userArrayList);
}
}
And I have a problem at this line: userArrayList = in.readTypedList(userArrayList, User.CREATOR); It looks like this: And example of the second model:
public class User implements Parcelable {
long id;
#JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm ZZZZ")
Date time;
String image_src;
String first_name;
String last_name;
public User() {
}
public String getFirst_name() {
return first_name;
}
public void setFirst_name(String first_name) {
this.first_name = first_name;
}
public String getLast_name() {
return last_name;
}
public void setLast_name(String last_name) {
this.last_name = last_name;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public Date getTime() {
return time;
}
public void setTime(Date time) {
this.time = time;
}
public String getImage_src() {
return image_src;
}
public void setImage_src(String image_src) {
this.image_src = image_src;
}
protected User(Parcel parcel) {
id = parcel.readLong();
time = new Date(parcel.readLong());
image_src = parcel.readString();
first_name = parcel.readString();
last_name = parcel.readString();
}
public static final Creator<User> CREATOR = new Creator<User>() {
#Override
public User createFromParcel(Parcel in) {
return new User(in);
}
#Override
public User[] newArray(int size) {
return new User[size];
}
};
public static Creator<User> getCREATOR() {
return CREATOR;
}
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeLong(id);
// parcel.writeLong(time.getTime());
parcel.writeString(image_src);
parcel.writeString(first_name);
parcel.writeString(last_name);
}
}
Can you help me to find my mistake?

You must initialized userArrayList before use it:
userArrayList = new ArrayList<User>();
in.readTypedList(userArrayList, User.CREATOR);

Initialize ArraList and retrieve the data to this list from parcelable.
Something like this:
userArrayList = new ArrayList<User>();
in.readTypedList(userArrayList, User.CREATOR);

map 2 collection types using modelmapper

I am developing and spring application and for object mapping I am using ModelMapper library.
I am able to map basic class mapping but when I am trying to map 2 collection elements, source is set of enumeration with additional property like name and description and destination is pojo having id, name and description.
I have tried typemap and converters in mapping profile but I am getting exception of mapper.
And the source class is from other application(whose dependency have been added in pom.xml). I also don't want source type as an argument in setter of destination.
Ex.
SOURCE:
public class VType{
private int id;
private String name;
private String description;
}
public class VDTO{
private Set<VType> vTypes;
public Set<VType> getVTypes(){
return this.vTypes;
}
public void setVType() { //here I don't want to pass source type as an argument
//code stuff that I don't know what to do here
}
}
SOURCE ENUM:
public enum SourceVType{
V1(1, "Name1", "Desc1");
V2(2, "Name2", "Desc2");
private Integer id;
private String name;
private String description;
SourceVType(Integer id, String name, String description) {
this.id = id;
this.name = name;
this.description = description;
}
//getter-setter
}

Have you tried converter feature of modelmapper. You can use typemap converter to achieve this requirement.
#RunWith(JUnit4.class)
public class TempTest {
#Test
public void TestThis(){
final ModelMapper mapper = new ModelMapper();
mapper.addMappings(new PropertyMap<SrcClass, DestClass>() {
#Override
protected void configure() {
this.map().setId(this.source.getId());
this.map().setName(this.source.getName());
mapper.createTypeMap(TypeEnum.class, TypeClass.class).setConverter(
new Converter<TypeEnum, TypeClass>() {
#Override
public TypeClass convert(MappingContext<TypeEnum, TypeClass> mappingContext) {
if (mappingContext.getSource() == null) {
return null;
}
TypeEnum typeEnum = mappingContext.getSource();
TypeClass typeClass = new TypeClass();
typeClass.setId(typeEnum.getId());
typeClass.setName(typeEnum.getName());
return typeClass;
}
});
}
});
SrcClass srcObj = new SrcClass();
srcObj.setId(1);
srcObj.setName("name");
srcObj.setTypes(new HashSet<>(Arrays.asList(TypeEnum.TYPE1, TypeEnum.TYPE2)));
DestClass dstObj = mapper.map(srcObj, DestClass.class);
Assert.assertEquals(srcObj.getId(), dstObj.getId());
Assert.assertEquals(srcObj.getName(), dstObj.getName());
Assert.assertEquals(srcObj.getTypes().size(), dstObj.getTypes().size());
for(TypeClass c : dstObj.getTypes()) {
TypeEnum e = TypeEnum.getById(c.getId());
Assert.assertNotNull(e);
Assert.assertTrue(srcObj.getTypes().contains(e));
}
}
public static <Source, Result> Set<Result> convertAll(Set<Source> source, Function<Source, Result> projection)
{
Set<Result> results = new HashSet<>();
if(source == null) return results;
for (Source element : source)
{
results.add(projection.apply(element));
}
return results;
}
public static class SrcClass{
private Integer id;
private String name;
private Set<TypeEnum> types;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<TypeEnum> getTypes() {
return types;
}
public void setTypes(Set<TypeEnum> types) {
this.types = types;
}
}
public static class DestClass{
private Integer id;
private String name;
private Set<TypeClass> types;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<TypeClass> getTypes() {
return types;
}
public void setTypes(Set<TypeClass> types) {
this.types = types;
}
}
public static enum TypeEnum{
TYPE1(1, "Type 1")
, TYPE2(2, "Type 2")
, TYPE3(3, "Type 3")
, TYPE4(4, "Type 4");
private Integer id;
private String name;
TypeEnum(Integer id, String name) {
this.id = id;
this.name = name;
}
private static final Map<Integer, TypeEnum> byId = new HashMap<>();
private static final Map<String, TypeEnum> byName = new HashMap<>();
static {
for (TypeEnum e : TypeEnum.values()) {
if (byId.put(e.getId(), e) != null) {
throw new IllegalArgumentException("duplicate id: " + e.getId());
}
if (byName.put(e.getName(), e) != null) {
throw new IllegalArgumentException("duplicate name: " + e.getName());
}
}
}
public Integer getId() {
return this.id;
}
public String getName() { return this.name; }
public static TypeEnum getById(Integer id) {
return byId.get(id);
}
public static TypeEnum getByName(String name) {
return byName.get(name);
}
}
public static class TypeClass{
private Integer id;
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
}