I am trying to use Set in hibernate. The problem I don't know to how to write annotation on the Set table.
#Entity
#Table(name="user_settings")
public class UserSettings {
#Id
#GeneratedValue
private int id;
private int userid;
protected Set<Integer>foreignLanguageId;
public UserSettings() {
}
public UserSettings(int userid, int nativeLanguageId,
Set<Integer> foreignLanguageId, Date birthday) {
this.userid = userid;
this.nativeLanguageId = nativeLanguageId;
this.foreignLanguageId = foreignLanguageId;
this.birthday = birthday;
}
#OneToMany
#JoinColumn(name="userid", nullable=false)// This annotation
public Set<Integer> getForeignLanguageId() {
return foreignLanguageId;
}
Error:
org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: user_settings, for columns: [org.hibernate.mapping.Column(foreignLanguageId)]
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:314)...........
You should to use entity to make an association not id
#Entity
#Table(name="user_settings")
public class UserSettings {
private Set<Language> foreignLanguages;
#OneToMany
#JoinColumn(name="fk_user_setting", nullable = false)
public Set<Language> getForeignLanguages() {
return foreignLanguages;
}
}
if you want to use Integer you can use #ElementCollection
#Entity
#Table(name="user_settings")
public class UserSettings {
private Set<Integer> foreignLanguages;
#ElementCollection
public Set<Integer> getForeignLanguages() {
return foreignLanguages;
}
}
Related
In Sprinboot/JPA I defined an entity with one-to-may association as follows:
#Entity
#Table(name = "useraccount", catalog = "useraccount")
public class UserAccount implements Serializable
{
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
//other stuff...
#OneToMany(mappedBy ="tokenId.user", cascade = {CascadeType.REMOVE, CascadeType.MERGE, CascadeType.REFRESH}, orphanRemoval =true, fetch=FetchType.LAZY)
private Set<SecureToken> tokens = new HashSet<>();
public Set<SecureToken> getTokens()
{
return this.tokens;
}
//other getter and setter
}
The SecureToken entity:
#Entity
#Table(name = "secureToken", catalog = "useraccount")
public class SecureToken implements Serializable
{
#EmbeddedId
public SecureTokenId tokenId= new SecureTokenId();
#Column(unique = true)
private String token;
private Timestamp isConsumed;
#CreationTimestamp
#Column(updatable = false)
private Timestamp timestamp;
#Column(updatable = false)
#Basic(optional = false)
private Timestamp expireAt;
#MapsId("user_id")
#JoinColumn(name = "user_id", referencedColumnName ="id")
#ManyToOne
private UserAccount user;
public SecureToken(UserAccount user, String token, String tokenType, Timestamp timestamp, Timestamp expire)
{
super();
this.token=token;
this.tokenId.setTokenType(tokenType);
this.tokenId.setUser(user);
this.timestamp=timestamp;
this.expireAt=expire;
this.isExpired=false;
}
}
The SecureTokenId:
#Embeddable
public class SecureTokenId implements Serializable
{
#Column(name="tokenType")
private String tokenType;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "user_id")
private UserAccount user;
public SecureTokenId()
{
super();
}
public SecureTokenId(String tokenType)
{
//this.user_id=user_id;
this.tokenType=tokenType;
}
#Override
public boolean equals(Object o)
{
if (o == null || getClass() != o.getClass())
return false;
SecureTokenId that = (SecureTokenId) o;
return Objects.equals(this.tokenType, that.tokenType) &&
Objects.equals(this.user.getId(), that.user.getId());
}
#Override
public int hashCode() {
return Objects.hash(tokenType, this.user.getId());
}
public void setTokenType(String tokenType)
{
this.tokenType=tokenType;
}
public String getTokenType()
{
return this.tokenType;
}
public void setUser(UserAccount user)
{
this.user=user;
}
public UserAccount getUser()
{
return this.user;
}
public Long getTokenId()
{
return this.user.getId();
}
}
But calling the method getToken() of entity UserAccount gets the famous "LazyInitializationException". I generally use Hibernate.initialize, but with this configuration I cannot get rid of the problem.
This how I create a token within a #Service annoted SecureTokenService class.
#Override
#Transactional
public SecureToken generateToken(UserAccount user, String tokenType)
{
byte[] random = new byte[64];
new SecureRandom().nextBytes(random);
Timestamp timestamp = java.sql.Timestamp.valueOf(LocalDateTime.now());
LocalDateTime expire= LocalDateTime.now().plusHours(12);
SecureToken token = new SecureToken(new SecureTokenId(user, tokenType),Base64.encodeBase64URLSafeString(random),
timestamp, Timestamp.valueOf(expire));
return token;
}
Then in the UserService class (#Service annotated) I try to create a token:
SecureToken token = secureTokenService.generateToken(user, type);
secureTokenService.save(token);
user.addSecureToken(token); //Error
this.save(user)
When I try to associate the token with the user the error is thrown. Without that statement, the application seems working but even with "spring.jpa.open-in-view = false" in application.properties calling user.getTokens() rises the lazy initialization error.
In parent child relationship, you didn't declare any parent reference from child side.
In the parent side (UserAccount), you declared as follows
#OneToMany(mappedBy ="user"....
Which means your child side (SecureToken) there is no such property named user.
To get rid of this situation,
First you need to declare user inside of SecureToken / SecureTokenId. From your definition, you declared user_id inside SecureTokenId, instead declare user inside SecureTokenId.
...
public class SecureTokenId ... {
...
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "user_id")
private UserAccount user;
...
}
Then in the UserAccount declare the #OneToMany as follows
#OneToMany(mappedBy ="tokenId.user"...
private Set<SecureToken> tokens;
A FailedDeliveryOrder class has a field with the type of DeliveryOrder class, while the DeliveryOrder class has a field with the type of List of ProductDes class. The DeliveryOrder field will be embedded in the same table as FailedDeliveryOrder.
How can I specify a custom name for the table of the List of ProductDes ?
FailedDeliveryOrder.java
#Table(name = "FailedDeliveryOrder")
#Entity
public class FailedDeliveryOrder {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#Embedded
private DeliveryOrder deliveryOrder;
public FailedDeliveryOrder() {
}
public FailedDeliveryOrder(DeliveryOrder deliveryOrder) {
this.deliveryOrder = deliveryOrder;
}
//setter and getter
}
DeliveryOrder.java
public class DeliveryOrder {
#Entity
public static class ProductDes {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
public Product() {}
// setter and getter
}
#OneToMany(fetch = FetchType.EAGER, cascade = {CascadeType.ALL})
#JoinColumn(
name = "DeliveryOrder_ID",
nullable = false
)
#OrderColumn(
name = "ProductDes_Position",
nullable = false
)
private List<ProductDes> product_descriptions = new ArrayList<Product>();
public DeliveryOrder() {
}
public DeliveryOrder(List<ProductDes> products) {
this.setProduct_descriptions(products);
}
public List<ProductDes> getProduct_descriptions() {
return product_descriptions;
}
public void setProduct_descriptions(List<ProductDes> product_descriptions) {
this.product_descriptions = product_descriptions;
}
}
Instead of autogenerated name.
Using Spring Data JPA & Hibernate, I am saving an object Company, that has 0 to Many AccountMapping. The AccountMappings Primary Key is a composite of a String accountNumber and the Company Primary Key. When I save a new company the COMP_NUM from the Company Object is not set into the AccountMapping object. When I use long companyNumber it is zero, and Long it is NUM. Hibernate is executing the insert statement first, but how to get it to set the primary key from company into child object ?
#Entity
#Table(name = "COMPANY")
public class Company implements Serializable {
#Id
#Column(name = "COMP_NUM")
#SequenceGenerator(name = "comp_num_seq", sequenceName = "comp_num_seq", allocationSize = 1)
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "comp_num_seq")
private long number;
#OneToMany(mappedBy = "companyNumber", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
private List<AccountMapping> accountMappings;
public Company() {
super();
}
public long getNumber() {
return this.number;
}
public void setNumber(long id) {
this.number = id;
}
public List<AccountMapping> getAccountMappings() {
return accountMappings;
}
public void setAccountMappings(List<AccountMapping> accountMappings) {
this.accountMappings = accountMappings;
}
}
#Entity
#IdClass(value = AccountMappingPK.class)
#Table(name = "ACCOUNT_MAPPING")
public class AccountMapping implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#Column(name = "ACCNT_NUM")
private String accountNumber;
#Id
#Column(name = "COMP_NUM")
private Long companyNumber;
#Column(name = "IS_PRIMARY")
private Boolean isPrimary;
public String getAccountNumber() {
return accountNumber;
}
public void setAccountNumber(String accountNumber) {
this.accountNumber = accountNumber;
}
public Long getCompanyNumber() {
return companyNumber;
}
public void setCompanyNumber(Long companyNumber) {
this.companyNumber = companyNumber;
}
public Boolean getIsPrimary() {
return isPrimary;
}
public void setIsPrimary(Boolean isPrimary) {
this.isPrimary = isPrimary;
}
}
public class AccountMapping implements Serializable {
#Column(name = "EA_ACCNT_NUM", nullable = false)
private String accountNumber;
#Column(name = "COMP_NUM", nullable = false)
private Long companyNumber;
public AccountMapping() {
// default constructor
}
public String getAccountNumber() {
return accountNumber;
}
public void setAccountNum(String accountNumber) {
this.accountNumber = accountNumber;
}
public Long getCompanyNumber() {
return companyNumber;
}
public void setCompanyNumber(Long companyNumber) {
this.companyNumber = companyNumber;
}
#Override
public boolean equals(Object obj) {
if (obj instanceof AccountMappingPK) {
AccountMappingPK accntPk = (AccountMappingPK) obj;
if (!(accountNumber.equals(accntPk.getAccountNumber()))) {
return false;
}
if (!(accntPk.getCompanyNumber() == (companyNumber))) {
return false;
}
return true;
}
return false;
}
#Override
public int hashCode() {
int hash = (accountNumber == null ? 1 : accountNumber.hashCode());
return (int) (hash * companyNumber);
}
}
#Entity
#IdClass(value = AccountMappingPK.class)
#Table(name = "ACCOUNT_MAPPING")
public class AccountMapping implements Serializable {
#Id
#Column(name = "ACCNT_NUM")
private String accountNumber;
#Id
#ManyToOne
#JoinColumn(name = "COMP_NUM")
private Company company;
...
}
// No annotations in this class
public class AccountMappingPK implements Serializable {
private String accountNumber;
private Company company;
...
// All the getter/setter, constructors, and so on ...
}
The Hibernate ORM documentation has more details about mapping with #IdClass: See Example 134. IdClass with #ManyToOne
Is it possible to combine two DAOs into one Service method?
I want to create a generic method which will choose correct DAO based on the input parameter. What for now I came up with is the method which will accept Dao from the outside the service object. But this requires to initialize appropriate Dao in the Controller which is a little bit ugly...
Measurement is just an interface for Temperature.java and Humidity.java entities with separate tables on PostgreSQL.
#Service
public class MeasurementService {
#Autowired
private TemperatureDao temperatureDao;
#Autowired
private HumidityDao humidityDao;
public<T extends PagingAndSortingRepository<Measurement, Long>> void insertMeasurementForUser(String username, List<Measurement> measurements, T dao) {
dao.saveAll(measurements);
}
}
TemperatureDao.java
#Repository
public interface TemperatureDao extends PagingAndSortingRepository<Temperature, Long> {
#Query("select u from Temperature u where u.owner = ?1 order by u.id desc")
List<Temperature> findLatestTemperatureForUser(User user, Pageable pageable);
}
HumidityDao.java
#Repository
public interface HumidityDao extends PagingAndSortingRepository<Humidity, Long> {
#Query("select u from Humidity u where u.owner = ?1 order by u.id desc")
List<Humidity> findLatestHumidityForUser(User user, Pageable pageable);
}
Temperature.java
#Entity
#Table(name = "temperature")
public class Temperature implements Measurement {
#Id
#Column(name = "id")
#GeneratedValue(strategy = GenerationType.SEQUENCE)
private Long id;
#Column(name = "th1value")
private Float th1Value;
#Column(name = "timestamp")
#NotNull
private LocalDateTime timestamp;
#ManyToOne
#JoinColumn(name = "user_id")
#NotNull
private User owner;
public Temperature() {
}
public Temperature(Float th1Value, LocalDateTime timestamp, User owner) {
this.th1Value = th1Value;
this.timestamp = timestamp;
this.owner = owner;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#JsonDeserialize(using = LocalDateTimeDeserializer.class)
public LocalDateTime getTimestamp() {
return timestamp;
}
#JsonSerialize(using = LocalDateTimeSerializer.class)
public void setTimestamp(LocalDateTime timestamp) {
this.timestamp = timestamp;
}
#Override
public User getOwner() {
return owner;
}
#Override
public void setOwner(User owner) {
this.owner = owner;
}
}
Humidity.java
#Entity
#Table(name = "humidity")
public class Humidity {
#Id
#Column(name = "id")
#GeneratedValue(strategy = GenerationType.SEQUENCE)
private Long id;
#Column(name = "hum1value")
private Float hum1Value;
#Column(name = "timestamp")
#NotNull
private LocalDateTime timestamp;
#ManyToOne
#JoinColumn(name = "user_id")
#NotNull
private User owner;
public Humidity() {
}
public Humidity(Float hum1Value, LocalDateTime timestamp, User owner) {
this.hum1Value = hum1Value;
this.timestamp = timestamp;
this.owner = owner;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#JsonDeserialize(using = LocalDateTimeDeserializer.class)
public LocalDateTime getTimestamp() {
return timestamp;
}
#JsonSerialize(using = LocalDateTimeSerializer.class)
public void setTimestamp(LocalDateTime timestamp) {
this.timestamp = timestamp;
}
public User getOwner() {
return owner;
}
public void setOwner(User owner) {
this.owner = owner;
}
}
Any ideas?
You could write a Resolver pattern to return needed dao based on your conditions. You service will use the resolver to get the correct dao.
public HellDao implements BaseDao {
public void save();
}
public ByeDao implements BaseDao {
public void save();
}
public DaoResolver {
#Autowired
private helloDao;
#Autowired
private byeDao;
public BaseDao resolve(Object input) {
//based on input return the correct dao
BaseDao resolvedDao = null;
switch(input.enum) {
case Hello:
resolvedDao = helloDao;
break;
case Hello:
resolvedDao = byeDao;
break;
default:
//decide something for default
}
return resolvedDao;
}
}
public class MyService {
#Autowired
private DaoResolver daoResolver;
public Object doSomething() {
BaseDao dao = daoResolver.resolve(someObject);
//you will get HelloDao or ByeDao based on the input
dao.save();
}
}
You can check for the type of measurements using instanceof so you could do it without generics.
public void insertMeasurementForUser(String username, List<Measurement> measurements) {
if(measurements.get(0) instanceof Temperature)
temperatureDao.saveAll(measurements);
else if(measurements.get(0) instanceof Humidity)
humidityDao.saveAll(measurements);
}
Thanks, let me completely change it.
Using:
Spring Boot, Hibernate JPA
I have created a link table with a composite primary key across all 3 columns(event_attendee_link_program)
I used the JPA tools in STS IDE to generate Entities from my tables and it came up with the below code. I removed some of the columns to save space.
EventAttendee.java
#Entity
#Table(name="event_attendee")
#NamedQuery(name="EventAttendee.findAll", query="SELECT e FROM EventAttendee e")
public class EventAttendee implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#Column(name="attendee_id")
private long attendeeId;
//bi-directional many-to-one association to EventAttendeeLinkProgram
#OneToMany(mappedBy="eventAttendee")
private List<EventAttendeeLinkProgram> eventAttendeeLinkPrograms;
public List<EventAttendeeLinkProgram> getEventAttendeeLinkPrograms() {
return this.eventAttendeeLinkPrograms;
}
public void setEventAttendeeLinkPrograms(List<EventAttendeeLinkProgram> eventAttendeeLinkPrograms) {
this.eventAttendeeLinkPrograms = eventAttendeeLinkPrograms;
}
public EventAttendeeLinkProgram addEventAttendeeLinkProgram(EventAttendeeLinkProgram eventAttendeeLinkProgram) {
getEventAttendeeLinkPrograms().add(eventAttendeeLinkProgram);
eventAttendeeLinkProgram.setEventAttendee(this);
return eventAttendeeLinkProgram;
}
public EventAttendeeLinkProgram removeEventAttendeeLinkProgram(EventAttendeeLinkProgram eventAttendeeLinkProgram) {
getEventAttendeeLinkPrograms().remove(eventAttendeeLinkProgram);
eventAttendeeLinkProgram.setEventAttendee(null);
return eventAttendeeLinkProgram;
}
}
EventAttendeeLinkProgram.java
#Entity
#Table(name="event_attendee_link_program")
#NamedQuery(name="EventAttendeeLinkProgram.findAll", query="SELECT e FROM EventAttendeeLinkProgram e")
public class EventAttendeeLinkProgram implements Serializable {
private static final long serialVersionUID = 1L;
#EmbeddedId
private EventAttendeeLinkProgramPK id;
//bi-directional many-to-one association to EventAttendee
#ManyToOne
#JoinColumn(name="attendee_id", insertable=false, updatable=false)
private EventAttendee eventAttendee;
//bi-directional many-to-one association to EventOptionsAttendeeType
#ManyToOne
#JoinColumn(name="attendee_type_id", insertable=false, updatable=false)
private EventOptionsAttendeeType eventOptionsAttendeeType;
//bi-directional many-to-one association to EventProgram
#ManyToOne
#JoinColumn(name="program_id", insertable=false, updatable=false)
private EventProgram eventProgram;
public EventAttendeeLinkProgram() {
}
public EventAttendeeLinkProgramPK getId() {
return this.id;
}
public void setId(EventAttendeeLinkProgramPK id) {
this.id = id;
}
public EventAttendee getEventAttendee() {
return this.eventAttendee;
}
public void setEventAttendee(EventAttendee eventAttendee) {
this.eventAttendee = eventAttendee;
}
public EventOptionsAttendeeType getEventOptionsAttendeeType() {
return this.eventOptionsAttendeeType;
}
public void setEventOptionsAttendeeType(EventOptionsAttendeeType eventOptionsAttendeeType) {
this.eventOptionsAttendeeType = eventOptionsAttendeeType;
}
public EventProgram getEventProgram() {
return this.eventProgram;
}
public void setEventProgram(EventProgram eventProgram) {
this.eventProgram = eventProgram;
}
}
EventAttendeeLinkProgramPK.java
#Embeddable
public class EventAttendeeLinkProgramPK implements Serializable {
//default serial version id, required for serializable classes.
private static final long serialVersionUID = 1L;
#Column(name="attendee_id", insertable=false, updatable=false)
private int attendeeId;
#Column(name="attendee_type_id", insertable=false, updatable=false)
private int attendeeTypeId;
#Column(name="program_id", insertable=false, updatable=false)
private int programId;
public EventAttendeeLinkProgramPK() {
}
public int getAttendeeId() {
return this.attendeeId;
}
public void setAttendeeId(int attendeeId) {
this.attendeeId = attendeeId;
}
public int getAttendeeTypeId() {
return this.attendeeTypeId;
}
public void setAttendeeTypeId(int attendeeTypeId) {
this.attendeeTypeId = attendeeTypeId;
}
public int getProgramId() {
return this.programId;
}
public void setProgramId(int programId) {
this.programId = programId;
}
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof EventAttendeeLinkProgramPK)) {
return false;
}
EventAttendeeLinkProgramPK castOther = (EventAttendeeLinkProgramPK)other;
return
(this.attendeeId == castOther.attendeeId)
&& (this.attendeeTypeId == castOther.attendeeTypeId)
&& (this.programId == castOther.programId);
}
public int hashCode() {
final int prime = 31;
int hash = 17;
hash = hash * prime + this.attendeeId;
hash = hash * prime + this.attendeeTypeId;
hash = hash * prime + this.programId;
return hash;
}
}
EventAttendeeServiceImpl.java
#Service
#Primary
public class EventAttendeeServiceImpl implements EventAttendeeService {
#Autowired
private EventAttendeeRepository eventAttendeeRepository;
#Autowired
private EventOptionsAttendeeTypeRepository eventOptionsAttendeeTypeRepository;
#Autowired
private EventProgramRepository eventProgramRepository;
#Override
#Transactional
public String addEventAttendee(EventAttendee eventAttendee) {
EventAttendeeLinkProgram ep = new EventAttendeeLinkProgram();
ep.setEventOptionsAttendeeType(eventOptionsAttendeeTypeRepository.findOne(2L));
ep.setEventProgram(eventProgramRepository.findOne(2L));
eventAttendee.setEventAttendeeLinkPrograms(new ArrayList<>());
eventAttendee.getEventAttendeeLinkPrograms().add(ep);
eventAttendeeRepository.save(eventAttendee);
return "";
}
With this in place, my code is not throwing any errors. It is saving the EventAttendee, but nothing is being saved to the EventAttendeeLinkProgram. Please Note: I am trying so save both EventAttendee and EventAttendeeLinkProgram entities. So I think hibernate should be smart enought to forst save EventAttendee and generating the Id for it, then use that Id to store in EventAttendeeLinkProgram.
Why don't you let spring do the heavy lifting:
First create a JPA repository in spring:
public interface UserRepository extends CrudRepository<User, Long>{
}
Then create your 2 entities with the relationship
#Entity
public class User {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
#Column(name = "name")
private String name;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "user", orphanRemoval = true, fetch = FetchType.EAGER)
private List<UserType> userTypes;
And :
#Entity
public class UserType {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "user_id")
private User user;
My test looks like this:
#RunWith(SpringRunner.class)
#SpringBootTest(classes = Application.class)
public class UserRepositoryTest extends AbstractTest {
#Autowired
private UserRepository userRepository;
#Test
#Transactional
public void test1() throws SQLException {
showTables();
User user1 = makeUser("Greg");
userRepository.save(user1);
System.out.println(user1);
userRepository.save(makeUser("George"));
assertEquals(2, userRepository.count());
User user = userRepository.findOne(1l);
}
User makeUser(String name) {
User user = new User();
user.setName(name);
user.setUserTypes(new ArrayList<>());
user.getUserTypes().add(makeUserType("admin"));
user.getUserTypes().add(makeUserType("head chef"));
return user;
}
UserType makeUserType(String description) {
UserType userType = new UserType();
userType.setDescription(description);
return userType;
}
}
First of all, user save return the identifier directly
Long insertId = (Long) session.save(user);
Then you'd better call the rollback on the txtransaction itself instead of retrieving again the transaction from the session.
Finally, when using spring you should consider to let spring manage the transaction itself (container managed transaction)using #Transactional annotation instead of using user managed transaction. It's logical as you let spring manage the session for you (sessionFactory.getCurrentSession()) and both session and transaction should have the same scope (e.g. the unit of work).
Consider reading some literature on Session (e.g. JPA entityManager) and transaction management.