Develop Reference

Detached entity passed to persist: JPA OneToMany relations

I'm trying to set up save entity with children together, but I can't find how it is works, I tried to do like in all tutorials but always had a error detached entity passed to persist
this is my entities:
#Entity
#Table(name = "CurriculumVitaes")
public class CurriculumVitae {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#NotBlank
private String title;
private String summary;
#OneToMany(mappedBy = "curriculumVitae", targetEntity = Education.class, cascade={CascadeType.ALL})
private List<Education> educations = new ArrayList<>();
public CurriculumVitae(){}
public CurriculumVitae(Long id, String title, String summary){
this.id = id;
this.title = title;
this.summary = summary;
}
public void addEducation(Education education) {
if(this.educations.contains(education)){
return;
}
this.educations.add(education);
education.setCurriculumVitae(this);
}
public void removeEducation(Education education){
if(this.educations.contains(education)){
return;
}
this.educations.remove(education);
education.setCurriculumVitae(null);
}
public boolean equals(Object object) {
if (object == this)
return true;
if ((object == null) || !(object instanceof CurriculumVitae))
return false;
final CurriculumVitae a = (CurriculumVitae)object;
if (id != null && a.getId() != null) {
return id.equals(a.getId());
}
return false;
}
}
and child entity:
#Entity
#Table(name = "Educations")
public class Education {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#NotBlank
private String title;
private String areaOfStudy;
private String description;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "curriculumVitaeId", referencedColumnName = "id")
private CurriculumVitae curriculumVitae;
public Education(){}
public Education(String title, String areaOfStudy, String description){
this.title = title;
this.areaOfStudy = areaOfStudy;
this.description = description;
}
public CurriculumVitae getCurriculumVitae() {
return curriculumVitae;
}
public void setCurriculumVitae(CurriculumVitae curriculumVitae) {
//prevent endless loop
if (sameAsFormer(curriculumVitae))
return ;
//set new owner
CurriculumVitae oldOwner = this.curriculumVitae;
this.curriculumVitae = curriculumVitae;
//remove from the old owner
if (oldOwner!=null)
oldOwner.removeEducation(this);
//set myself into new owner
if (curriculumVitae!=null)
curriculumVitae.addEducation(this);
}
private boolean sameAsFormer(CurriculumVitae newOwner) {
return this.curriculumVitae==null? newOwner == null : this.curriculumVitae.equals(newOwner);
}
public boolean equals(Object object) {
if (object == this)
return true;
if ((object == null) || !(object instanceof Education))
return false;
final Education a = (Education)object;
if (id != null && a.getId() != null) {
return id.equals(a.getId());
}
return false;
}
}
How can I set up save entities all together with one repository method save?
without cascade it will not save inner entities.
#PostMapping
public #ResponseBody CurriculumVitaeViewModel addCurriculumVitae(#RequestBody SaveCurriculumVitaeRequest model){
CurriculumVitae newCv = new CurriculumVitae();
curriculumVitaeModelMapper.Map(model, newCv);
for (EducationViewModel ed:model.getEducations()
) {
Education newEd = new Education();
educationModelMapper.Map(ed, newEd);
newCv.addEducation(newEd);
}
CurriculumVitae savedCv = curriculumVitaeRepository.save(newCv);

JPA Criteria Query - How to implement Join on two tables to get desired result in single Query

I have 2 classes mapped with db Tables.
Composite Primary Key Class :
#Embeddable
public class Pk implements Serializable, Cloneable {
#Column(name = "dataId")
private String dataId;
#Column(name = "occurrenceTime")
private Timestamp occurrenceTime;
public String getDataId() {
return dataId;
}
public Pk setDataId(String dataId) {
this.dataId = dataId;
return this;
}
public Timestamp getOccurrenceTime() {
return occurrenceTime;
}
public Pk setOccurrenceTime(Timestamp occurrenceTime) {
this.occurrenceTime = occurrenceTime;
return this;
}
#Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Pk pk = (Pk) o;
return Objects.equals(getDataId(), pk.getDataId()) &&
Objects.equals(getOccurrenceTime(), pk.getOccurrenceTime());
}
#Override
public int hashCode() {
return Objects.hash(getDataId(), getOccurrenceTime());
}
}
1 : LoadProfile
#Entity
#Table(name = "energy")
public class LoadProfile implements Serializable, Cloneable {
public LoadProfile() {
}
#EmbeddedId
private Pk pk;
#Column(name = "RECEIVE_TIME")
private Timestamp reportingTime;
#Column(name = "DATA1")
private Double DATA1;
#OneToOne
#JoinColumns({
#JoinColumn(name = "dataId", insertable = false, updatable = false, referencedColumnName = "dataId"),
#JoinColumn(name = "occurrenceTime", insertable = false, updatable = false, referencedColumnName = "occurrenceTime")
})
private ForwardPower forwardPower;
public Pk getPk() {
return pk;
}
public LoadProfile setPk(Pk pk) {
this.pk = pk;
return this;
}
public Timestamp getReportingTime() {
return reportingTime;
}
public LoadProfile setReportingTime(Timestamp reportingTime) {
this.reportingTime = reportingTime;
return this;
}
public Double getDATA1() {
return DATA1;
}
public LoadProfile setDATA1(Double DATA1) {
this.DATA1 = DATA1;
return this;
}
public ForwardPower getForwardPower() {
return forwardPower;
}
public LoadProfile setForwardPower(
ForwardPower forwardPower) {
this.forwardPower = forwardPower;
return this;
}
#Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
LoadProfile that = (LoadProfile) o;
return Objects.equals(getPk(), that.getPk());
}
#Override
public int hashCode() {
return Objects.hash(getPk());
}
}
2 : ForwardPower
#Entity
#Table(name = "forward_power")
public class ForwardPower implements Serializable, Cloneable {
public ForwardPower() {
}
#EmbeddedId
private Pk pk;
#Column(name = "RECEIVE_TIME")
private Timestamp reportingTime;
#Column(name = "DATA2")
private Double DATA2;
public Pk getPk() {
return pk;
}
public ForwardPower setPk(Pk pk) {
this.pk = pk;
return this;
}
public Timestamp getReportingTime() {
return reportingTime;
}
public ForwardPower setReportingTime(Timestamp reportingTime) {
this.reportingTime = reportingTime;
return this;
}
public Double getDATA2() {
return DATA2;
}
public ForwardPower setDATA2(Double DATA2) {
this.DATA2= DATA2;
return this;
}
#Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
ForwardPower that = (ForwardPower) o;
return Objects.equals(getPk(), that.getPk());
}
#Override
public int hashCode() {
return Objects.hash(getPk());
}
}
I want to execute a query
Select * From energy e
Left join forward_power fp
on fp.dataId== e.dataId and fp.occurrenceTime == e.occurrenceTime
where e.occurrenceTime >= '2017-12-28 00:00:00'
and e.occurrenceTime <= '2018-01-02 00:00:00'
Limit 1000;
I wrote a equivalent Query in java using JPA criteria Query
CriteriaBuilder cb = session.getCriteriaBuilder();
CriteriaQuery<LoadProfile> cq = cb.createQuery(LoadProfile.class);
Root<LoadProfile> loadProfileRoot = cq.from(LoadProfile.class);
Join<LoadProfile, ForwardPower> join = loadProfileRoot.join(LoadProfile_.forwardPower);
List<Predicate> conditions = new ArrayList();
conditions.add(cb.equal(loadProfileRoot.get(LoadProfile_.pk).get(Pk_.dataId), join.get(
ForwardPower_.pk).get(Pk_.dataId)));
conditions.add(cb.equal(loadProfileRoot.get(LoadProfile_.pk).get(Pk_.occurrenceTime),
join.get(ForwardPower_.pk).get(Pk_.occurrenceTime)));
conditions.add(
cb.greaterThanOrEqualTo(loadProfileRoot.get(LoadProfile_.pk).get(Pk_.occurrenceTime),
config.getDataStartTime()));
conditions.add(
cb.lessThanOrEqualTo(loadProfileRoot.get(LoadProfile_.pk).get(Pk_.occurrenceTime),
config.getDataEndTime()));
cq.select(loadProfileRoot);
cq.where(conditions.toArray(new Predicate[]{}));
Query query = session.createQuery(cq);
List list = query.setFirstResult(0).setMaxResults(1000).getResultList();
I set the Option hibernate.show_sql = true.
Now that query gives me exact 1000 desired result.
when i see the hibernate query which is generated by ORM by above code.
ORM create 1 query for energy table and 1000 queries for forwardpower table which cause performance issue and query take too much time aproximately 55 - 60 seconds for fetching 1000 records.
How i can create a criteria Query so that ORM generate exactly 1 query for that code?
Thanks in advance.

You can add a fetch type eager instructions on your relation, and the ForwardPower will be load with LoadProfile with any LoadProfile.find
#OneToOne(fetch=FetchType.EAGER)
#JoinColumns({
#JoinColumn(name = "dataId", insertable = false, updatable = false, referencedColumnName = "dataId"),
#JoinColumn(name = "occurrenceTime", insertable = false, updatable = false, referencedColumnName = "occurrenceTime")
})
private ForwardPower forwardPower;
Or you can add the fetch instruction in your query.
I'm not familiar with it but it's probably something like that
//instead of loadProfileRoot.join(LoadProfile_.forwardPower)
Join<LoadProfile, ForwardPower> join = (Join<LoadProfile, ForwardPower>) loadProfileRoot.fetch(LoadProfile_.forwardPower);
See JPA 2 Criteria Fetch Path Navigation for more information about fetch with CriteriaBuilder.

Many to Many relationships using Spring Boot, Jackson and Hibernate

I'm working on a rest project using Spring Boot and Hibernate and am currently trying to figure out how to handle my json-serialization.
The schema shown in the ERD above is mapped by Hibernate and works fine.
The problem arises when I make a get request to a controller. My understanding is that Spring now tries to serialize the object-chain using Jackson. Because both the parent and child objects have one another as an attribute, we find ourselves hitting an infinite recursion loop.
Now I've looked into #JsonIgnore, #JsonView, #JsonManagedReference and #JsonBackReference but these only seem to work for one-to-many relationships.
What I'm looking for is a situation where when I for instance make a GET request to /users/{id}, I get the user object including all it's relationship attributes (let's call it the full object), but the relationship attributes themselves don't show their relationship-attributes (minimized objects). This works fine with the annotations mentioned above, but how do I make this work the other way as well?
Desired response for: /users/{id}
{ // full user object
id: 1,
username: 'foo',
// password can be JsonIgnored because of obvious reasons
role: { // minimized role object
id: 1,
name: 'bar'
// NO USERS LIST
}
area: { //minimized area object
id: 2,
name: 'some val'
// NO USERS LIST
// NO TABLES LIST
}
}
Desired response for /userrole/{id}
{ // full role object
id: 1,
name: 'waiter'
users: [
{ // minmized user object
id: 1,
username: 'foo'
// password can be JsonIgnored because of obvious reasons
// NO ROLE OBJECT
// NO AREA OBJECT
},
{ // minmized user object
id: 1,
username: 'foo'
// password can be JsonIgnored because of obvious reasons
// NO ROLE OBJECT
// NO AREA OBJECT
}
]
}
In general: I'd like a full object when the request is made to the entity directly and a minimized object when requested indirectly.
Any Ideas? I hope my explanation is clear enough.
UPDATE
The Area, User and UserRole POJO's as requested in the comment sections.
User
#Entity
#Table(name = "users", schema = "public", catalog = "PocketOrder")
public class User {
private int id;
private String username;
private String psswrd;
private List<Area> areas;
private UserRole Role;
#Id
#Column(name = "id", nullable = false)
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Basic
#Column(name = "username", nullable = false, length = 20)
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
#Basic
#JsonIgnore
#Column(name = "psswrd", nullable = true, length = 40)
public String getPsswrd() {
return psswrd;
}
public void setPsswrd(String psswrd) {
this.psswrd = psswrd;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
User user = (User) o;
if (id != user.id) return false;
if (username != null ? !username.equals(user.username) : user.username != null) return false;
if (psswrd != null ? !psswrd.equals(user.psswrd) : user.psswrd != null) return false;
return true;
}
#Override
public int hashCode() {
int result = id;
result = 31 * result + (username != null ? username.hashCode() : 0);
result = 31 * result + (psswrd != null ? psswrd.hashCode() : 0);
return result;
}
#ManyToMany(mappedBy = "users")
public List<Area> getAreas() {
return areas;
}
public void setAreas(List<Area> areas) {
this.areas = areas;
}
#ManyToOne
#JoinColumn(name = "role_fk", referencedColumnName = "id", nullable = false)
public UserRole getRole() {
return Role;
}
public void setRole(UserRole role) {
Role = role;
}
}
UserRole
#Entity
#javax.persistence.Table(name = "userroles", schema = "public", catalog = "PocketOrder")
public class UserRole {
private int id;
private String name;
private List<User> users;
#Id
#Column(name = "id", nullable = false)
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Basic
#Column(name = "name", nullable = false, length = 20)
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
UserRole userRole = (UserRole) o;
if (id != userRole.id) return false;
if (name != null ? !name.equals(userRole.name) : userRole.name != null) return false;
return true;
}
#Override
public int hashCode() {
int result = id;
result = 31 * result + (name != null ? name.hashCode() : 0);
return result;
}
#OneToMany(mappedBy = "role")
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
users = users;
}
}
Area
#Entity
#javax.persistence.Table(name = "areas", schema = "public", catalog = "PocketOrder")
public class Area {
private int id;
private String name;
private List<User> users;
private List<Table> tables;
#Id
#Column(name = "id", nullable = false)
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Basic
#Column(name = "name", nullable = false, length = 20)
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Area area = (Area) o;
if (id != area.id) return false;
if (name != null ? !name.equals(area.name) : area.name != null) return false;
return true;
}
#Override
public int hashCode() {
int result = id;
result = 31 * result + (name != null ? name.hashCode() : 0);
return result;
}
#ManyToMany
#JoinTable(name = "areas_users", catalog = "PocketOrder", schema = "public", joinColumns = #JoinColumn(name = "area_fk", referencedColumnName = "id", nullable = false), inverseJoinColumns = #JoinColumn(name = "user_fk", referencedColumnName = "id", nullable = false))
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
this.users = users;
}
#OneToMany(mappedBy = "area")
public List<Table> getTables() {
return tables;
}
public void setTables(List<Table> tables) {
this.tables = tables;
}
}

Try use #JsonSerialize on specific points:
For sample:
1 - Map your field
#JsonSerialize(using = ExampleSampleSerializer.class)
#ManyToOne
private Example example;
2 - Create custom jackson serializer (Here you can control the serialization)
public class ExampleSampleSerializer extends JsonSerializer<Example> {
#Override
public void serialize(Example value, JsonGenerator jsonGenerator, SerializerProvider serializers) throws IOException, JsonProcessingException {
jsonGenerator.writeStartObject();
jsonGenerator.writeFieldName("first");
jsonGenerator.writeNumber(value.getFirstValue());
jsonGenerator.writeFieldName("second");
jsonGenerator.writeNumber(value.getSecondValue());
jsonGenerator.writeFieldName("third");
jsonGenerator.writeNumber(value.getAnyAnotherClass().getThirdValue());
jsonGenerator.writeEndObject();
}
}

The way I worked around this on a Many-to-Many relationship is by using
#JsonIgnore
On one of the Entities.
For example we have Person and Child entities. One Person can have many children and vice-versa.
On Person we have :
public class Person
{
//Other fields ommited
#ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.PERSIST)
#JoinTable(name = "person_child",
joinColumns = {
#JoinColumn(name = "person_id", referencedColumnName = "id", nullable = false,
updatable = false)
},
inverseJoinColumns = {
#JoinColumn(name = "child_id", referencedColumnName = "id", nullable =
false, updatable = false)
})
private Set<Child> children = new HashSet<>() ;
}
And on Child we have :
public class Child
{
#JsonIgnore
#ManyToMany(mappedBy = "children", fetch = FetchType.LAZY)
private Set<Person> people = new HashSet<>() ;
}
Now when we get a Person, we also get all his connected children. But when we get a Child then we don't get all People because we have #JsonIgnore annotation on it.
This fixes the Infinite Recursion problem, and raises this one.
My workaround was by writing a query to get me all the People connected to a specific child_id.
Below you may see my code:
public interface PersonDAO extends JpaRepository<Person, Long>
{
#Query(value = "SELECT * " +
" FROM person p INNER JOIN person_child j " +
"ON p.id = j.person_id WHERE j.child_id = ?1 ", nativeQuery = true)
public List<Person> getPeopleViaChildId(long id);
}
And i use it whenever I want to get all People from a child.

Deployment Error caused by Entity (Ecommerce)

I'm really stuck here and I'd love to get some help right about now.
Everytime I try to deploy, it keeps saying that it failed.
EDIT:
Okay so I've realized that the main issue seems to be:
Caused by: Exception [EclipseLink-7154] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The attribute [productCollection] in entity class [class entity.Category] has a mappedBy value of [category] which does not exist in its owning entity class [class entity.Product]. If the owning entity class is a #MappedSuperclass, this is invalid, and your attribute should reference the correct subclass.
The entity classes are as follows:
Category.java
#Entity
#Table(name = "category")
#NamedQueries({
#NamedQuery(name = "Category.findAll", query = "SELECT c FROM Category c"),
#NamedQuery(name = "Category.findById", query = "SELECT c FROM Category c WHERE c.id = :id"),
#NamedQuery(name = "Category.findByName", query = "SELECT c FROM Category c WHERE c.name = :name")})
public class Category implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Basic(optional = false)
#Column(name = "id")
private Short id;
#Basic(optional = false)
#Column(name = "name")
private String name;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "category")
private Collection<Product> productCollection;
public Category() {
}
public Category(Short id) {
this.id = id;
}
public Category(Short id, String name) {
this.id = id;
this.name = name;
}
public Short getId() {
return id;
}
public void setId(Short id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Collection<Product> getProductCollection() {
return productCollection;
}
public void setProductCollection(Collection<Product> productCollection) {
this.productCollection = productCollection;
}
#Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.hashCode() : 0);
return hash;
}
#Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof Category)) {
return false;
}
Category other = (Category) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}
#Override
public String toString() {
return "entity.Category[id=" + id + "]";
}
}
Product.java
#Entity
#Table(name = "product")
#XmlRootElement
#NamedQueries({
#NamedQuery(name = "Product.findAll", query = "SELECT p FROM Product p"),
#NamedQuery(name = "Product.findById", query = "SELECT p FROM Product p WHERE p.id = :id"),
#NamedQuery(name = "Product.findByName", query = "SELECT p FROM Product p WHERE p.name = :name"),
#NamedQuery(name = "Product.findByPrice", query = "SELECT p FROM Product p WHERE p.price = :price"),
#NamedQuery(name = "Product.findByDescription", query = "SELECT p FROM Product p WHERE p.description = :description"),
#NamedQuery(name = "Product.findByLastUpdate", query = "SELECT p FROM Product p WHERE p.lastUpdate = :lastUpdate")})
public class Product implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Basic(optional = false)
#Column(name = "id")
private Integer id;
#Basic(optional = false)
#NotNull
#Size(min = 1, max = 45)
#Column(name = "name")
private String name;
#Basic(optional = false)
#NotNull
#Size(min = 1, max = 45)
#Column(name = "price")
private BigDecimal price;
#Size(max = 255)
#Column(name = "description")
private String description;
#Basic(optional = false)
#NotNull
#Column(name = "last_update")
#Temporal(TemporalType.TIMESTAMP)
private Date lastUpdate;
#JoinColumn(name = "category_id", referencedColumnName = "id")
#ManyToOne(optional = false)
private Category categoryId;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "product")
private Collection<OrderedProduct> orderedProductCollection;
public Product() {
}
public Product(Integer id) {
this.id = id;
}
public Product(Integer id, String name, BigDecimal price, Date lastUpdate) {
this.id = id;
this.name = name;
this.price = price;
this.lastUpdate = lastUpdate;
}
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 BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Date getLastUpdate() {
return lastUpdate;
}
public void setLastUpdate(Date lastUpdate) {
this.lastUpdate = lastUpdate;
}
public Category getCategoryId() {
return categoryId;
}
public void setCategoryId(Category categoryId) {
this.categoryId = categoryId;
}
#XmlTransient
public Collection<OrderedProduct> getOrderedProductCollection() {
return orderedProductCollection;
}
public void setOrderedProductCollection(Collection<OrderedProduct> orderedProductCollection) {
this.orderedProductCollection = orderedProductCollection;
}
#Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.hashCode() : 0);
return hash;
}
#Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof Product)) {
return false;
}
Product other = (Product) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}
#Override
public String toString() {
return "entity.Product[ id=" + id + " ]";
}
}
Please help me as soon as possible.
Thank you.

I figured out the solution.
All i had to do was change:
#OneToMany(cascade = CascadeType.ALL, mappedBy = "category")
to
#OneToMany(cascade = CascadeType.ALL, mappedBy = "categoryId")
Because in my Product.java, the category is mentioned as:
public Category getCategoryId() {
return categoryId;
}

Issue with cascade persisting of the composite primary key mapping based on UUID identity

So here is short description of my problem. I have two tables, first contains Person details:
#Entity
#Converter(name = "uuidConverter", converterClass = UUIDConverter.class)
public class Person {
private UUID mId;
private String mLogin;
#Id
#UuidGenerator(name = "uuid")
#GeneratedValue(generator = "uuid")
#Column(name = "id", nullable = false)
#Convert("uuidConverter")
public UUID getId() {
return mId;
}
#Column(name = "login", nullable = false)
public String getLogin() {
return mLogin;
}
public Person setId(UUID id) {
mId = id;
return this;
}
public Person setLogin(String login) {
mLogin = login;
return this;
}
}
Second table contains multiple person preferences:
#IdClass(PersonPreference.Pk.class)
#Table(name = "person_preference")
#Entity
#Converter(name = "uuidConverter", converterClass = UUIDConverter.class)
public class PersonPreference {
private Person mPerson;
private String mComponentUid;
private String mComponentProperties;
#SuppressWarnings("UnusedDeclaration")
static class Pk implements Serializable {
private String mComponentUid;
private UUID mPerson;
public String getComponentUid() {
return mComponentUid;
}
public void setComponentUid(String componentUid) {
mComponentUid = componentUid;
}
#Convert("uuidConverter")
public UUID getPerson() {
return mPerson;
}
public void setPerson(UUID person) {
mPerson = person;
}
#Override
public int hashCode() {
return Objects.hashCode(mComponentUid, mPerson);
}
#Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Pk other = (Pk) obj;
return Objects.equal(this.mComponentUid, other.mComponentUid) && Objects.equal(this.mPerson, other.mPerson);
}
}
#Id
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "person_id", nullable = false)
public Person getPerson() {
return mPerson;
}
#Id
#Column(name = "component_uid", nullable = false)
public String getComponentUid() {
return mComponentUid;
}
#Column(name = "component_properties", nullable = false)
public String getComponentProperties() {
return mComponentProperties;
}
public PersonPreference setPerson(Person person) {
mPerson = person;
return this;
}
public PersonPreference setComponentUid(String componentUid) {
mComponentUid = componentUid;
return this;
}
public PersonPreference setComponentProperties(String componentProperties) {
mComponentProperties = componentProperties;
return this;
}
#Override
public int hashCode() {
return Objects.hashCode(mPerson, mComponentUid, mComponentProperties);
}
#Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final PersonPreference other = (PersonPreference) obj;
return Objects.equal(this.mPerson, other.mPerson)
&& Objects.equal(this.mComponentUid, other.mComponentUid)
&& Objects.equal(this.mComponentProperties, other.mComponentProperties);
}
}
I also wrote a simple test:
Person person = new Person()
.setLogin("PersonPreferencePersistenceTestLogin");
PersonPreference personPreference = new PersonPreference()
.setPerson(person)
.setComponentUid("4028808C3AA49ABB013AA49ABB2B0000")
.setComponentProperties("{123}");
mPersonPreferenceService.save(personPreference);
Optional<PersonPreference> newPersonPreference = mPersonPreferenceService.getByPersonAndComponentUid(
person,
"4028808C3AA49ABB013AA49ABB2B0000"
);
Assert.assertEquals(personPreference.getComponentProperties(), newPersonPreference.get().getComponentProperties());
We used previously Hibernate as JPA provider and that code works perfectly. Unfortunately, after switching JPA provider to Eclipselink, cascade persisting dosen't work correctly. From log I found out:
--INSERT INTO PERSON (id, login) VALUES (?, ?)
bind => [f2ce518c-8f37-4fac-bf5b-c8225d228b28, PersonPreferencePersistenceTestLogin]
--INSERT INTO person_preference (component_uid, component_properties, person_id) VALUES (?, ?, ?)
bind => [4028808C3AA49ABB013AA49ABB2B0000, {123}, f2ce518c-8f37-4fac-bf5b-c8225d228b28]
--SELECT component_uid, component_properties, person_id FROM person_preference WHERE ((person_id = ?) AND (component_uid = ?))
bind => [null, 4028808C3AA49ABB013AA49ABB2B0000]
But person.getId() returns null value. I don't know why? Other mappings works fine with cascade persisting, but that fails in Eclipselink.