I have two fields that should appear in each table. So I wanted to create an entity that will hold these fields and the rest of my entities inherited these fields
But when I run the query I get the error - org.hibernate.QueryException: could not resolve property: active of: com.db.tables.PersonTable
what i'm doing wrong?
Base class all entities should inherit these fields
#XmlRootElement
#Inheritance(strategy=InheritanceType.SINGLE_TABLE)
public class BaseTable implements Serializable
{
private static final long serialVersionUID = 1L;
#Column(name = "Updated")
#JsonProperty
#NotNull
protected Timestamp updated;
#Column(name = "Active")
#JsonProperty
#NotNull
protected byte active;
public BaseTable ()
{
active = (byte)1;
updated = DbUtils.getCurrentTimeStamp();
}
public byte getActive()
{
return active;
}
public void setActive(byte active)
{
this.active = active;
}
public Timestamp getUpdated()
{
return updated;
}
public void setUpdated(Timestamp updated)
{
this.updated = updated;
}
#Override
public String toString()
{
return new ReflectionToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE).toString();
}
#Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = prime * result + active;
result = prime * result + ((updated == null) ? 0 : updated.hashCode());
return result;
}
#Override
public boolean equals(Object obj)
{
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
BaseTable other = (BaseTable) obj;
if (active != other.active) return false;
if (updated == null)
{
if (other.updated != null) return false;
}
else if (!updated.equals(other.updated)) return false;
return true;
}
}
A class that inherits
#Entity(name = "Persons")
#Table(name = "Persons")
public class PersonTable extends BaseTable implements Serializable
{
private static final long serialVersionUID = -5793514680136648542L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "PersonId")
private short personId;
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(name="personId")
PortalUserTable portalUser;
//getters&settersand more fields
}
one more class that inherits
#Entity(name = "PortalUser")
#Table(name = "PortalUser")
public class PortalUserTable extends BaseTable implements Serializable
{
private static final long serialVersionUID = -5793514680136648542L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "PersonId")
private short personId;
#OneToOne
(mappedBy = "portalUser")
PersonTable person;
//getters&settersand more fields
}
the query
public ObjectDaoResponse getAllTigrisUsers() throws JsonProcessingException
{
try
{
Query q = sessionFactory.getCurrentSession().createQuery("SELECT new com.db.queries.users.User( u.portalUserId ,p.personName) FROM PortalUsers u INNER JOIN u.person p WHERE portalUserId = p.personId AND p.active = 1 AND u.active = 1");
List<TigrisUser> l = q.list();
return ObjectDaoResponse.getAnOkResponse(l);
}
catch(Exception e)
{
System.out.println(e);
return ObjectDaoResponse.getGeneralFailureResponse();
}
}
#MappedSuperclass
public class BaseTable ...
I would suggest to change naming convention Base(Table) -> Base(Entity). Do the same for all entity classes.
You should take care of inheritance strategy - https://en.wikibooks.org/wiki/Java_Persistence/Inheritance
Related
I have 3 tables. Hospitals and doctors. The 3rd table is a junction table of both that contains id,ids of 2 other tables as foreign keys and few other columns. When trying to put record to a junction table I got an error that one of foreign keys have to be set with insertable=false. However when I set it like this then I get that the value can't be null (since my database requires that field).I'm stuck and can't go any further with those 2 errors.
If I manage to avoid those 2 errors then I get an erorr that there is an unknown column in the field list.
Doctors entity:
#Entity
#Table(name = "doctors")
public class Doctors implements Serializable {
private Integer id;
private String name;
private String surname;
private String title;
private String licenseNumber;
private String phone;
private String email;
private String nationality;
private String speciality;
private LocalDate dateOfBirth;
private Boolean isATeacher;
private List<HospitalDoctors> hospitalDoctors = new LinkedList<>();
//consturctors
#Id
#GenericGenerator(name = "generator", strategy = "increment")
#GeneratedValue(generator = "generator")
#Column(name = "Idd", nullable = false)
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
//setters and getters for rest of the fields with #column annotations on getters
#OneToMany(fetch = FetchType.LAZY, mappedBy = "pk.doctor", cascade = {CascadeType.PERSIST, CascadeType.MERGE})
#Cascade({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.DELETE})
public List<HospitalDoctors> getHospitalDoctors() {
return hospitalDoctors;
}
public void setHospitalDoctors(List<HospitalDoctors> hospitalDoctors) {
this.hospitalDoctors = hospitalDoctors;
}
Hospitals entity:
#Entity
#Table(name = "hospitals")
public class Hospitals implements Serializable {
private Integer id;
private String name;
private String country;
private String town;
private String street;
private String postalCode;
private String phoneNumber;
private String faxNumber;
private Integer numberOfAmbulances;
private Boolean helicopterAccess;
private Boolean teachingHospital;
private List<HospitalDoctors> hospitalDoctors = new LinkedList<>();
//constructors
#Id
#GenericGenerator(name = "generator", strategy = "increment")
#GeneratedValue(generator = "generator")
#Column(name = "Idh", nullable = false)
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
//getters setters with #column annotations over getters
#OneToMany(fetch = FetchType.LAZY, mappedBy = "pk.hospital", cascade = {CascadeType.PERSIST, CascadeType.MERGE})
#Cascade({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.DELETE})
public List<HospitalDoctors> getHospitalDoctors() {
return this.hospitalDoctors;
}
public void setHospitalDoctors(List<HospitalDoctors> hospitalDoctors) {
this.hospitalDoctors = hospitalDoctors;
}
Junction table entity:
#Entity
#Table(name = "hospitaldoctors")
#AssociationOverrides({
#AssociationOverride(name = "pk.hospital",
joinColumns = #JoinColumn(name = "Idh")),
#AssociationOverride(name = "pk.doctor",
joinColumns = #JoinColumn(name = "Idd"))
})
public class HospitalDoctors implements Serializable {
private Integer id;
private Integer idH;
private Integer idD;
private HospitalDoctorsId pk = new HospitalDoctorsId();
private LocalDate contractStartDate;
private LocalDate contractEndDate;
private String position;
private Boolean supervisor;
private Boolean partTime;
//constructors
#Column(name ="Idhos")
public Integer getIdH() {
return this.idH;
}
public void setIdH(Integer idH) {
this.idH = idH;
}
#Column(name ="Iddoc")
public Integer getIdD() {
return this.idD;
}
public void setIdD(Integer idD) {
this.idD = idD;
}
#EmbeddedId
public HospitalDoctorsId getPk() {
return pk;
}
public void setPk(HospitalDoctorsId pk) {
this.pk = pk;
}
#Transient
public Hospitals getHospital(){
return getPk().getHospital();
}
public void setHospital(Hospitals hospital){
getPk().setHospital(hospital);
}
#Transient
public Doctors getDoctor(){
return getPk().getDoctor();
}
public void setDoctor(Doctors doctor){
getPk().setDoctor(doctor);
}
//rest of the setters getters with #Column
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
HospitalDoctors that = (HospitalDoctors) o;
if(getPk() != null?!getPk().equals(that.getPk()) : that.getPk() != null) return false;
return true;
}
#Override
public int hashCode() {
return (getPk() != null? getPk().hashCode() : 0);
}
Junction table Id:
#Embeddable
public class HospitalDoctorsId implements Serializable {
private Hospitals hospital;
private Doctors doctor;
#ManyToOne
public Hospitals getHospital() {
return hospital;
}
public void setHospital(Hospitals hospital) {
this.hospital = hospital;
}
#ManyToOne
public Doctors getDoctor() {
return doctor;
}
public void setDoctor(Doctors doctor) {
this.doctor = doctor;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
HospitalDoctorsId that = (HospitalDoctorsId) o;
if(hospital != null?!hospital.equals(that.hospital) : that.hospital != null) return false;
if(doctor != null?!doctor.equals(that.doctor) : that.doctor != null) return false;
return true;
}
#Override
public int hashCode() {
int result;
result = (hospital != null? hospital.hashCode() : 0);
result = 31* result + (doctor != null? doctor.hashCode() : 0);
return result;
}
}
I expected to be able to add records to junction table in data base in form fields I have foreign keys for hospital and doctors id to put in as well as other fields. Unfortunately I get either error that say to put foreign keys columns idD and idH as insertable, updatable false which leads to null value being passed which gives another error. When I solve those errors I get the error:
java.sql.SQLSyntaxErrorException: Unknown column 'hospitaldo0_.Idd' in 'field list'when trying to display records nad unknown column Idd when trying to add record (displaying works when Im getting insertable error or null value error. adding never works)
If I remember correctly, you need to have a single #ManyToMany relation rather than two #OneToMany relations.
Environment:
javaee 7
java 8
jpa 2
I got the error EntityNotFoundException when I make a query of Moviment and automatically tries to load the associated Espai after I have modifed Espai class to separate id and version in a separate class with the annotation #MappedSuperclass.
I can suspect that it is something related with equals() and hashCode() methods but I have not been able to figure out the problem.
Espai that works fine
#Entity
#Table(name = "a_espai")
public class Espai implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
private String nom;
private Integer version;
#ManyToOne
#JoinColumn(name = "idServei", referencedColumnName = "id")
private Servei servei;
...
#Override
public int hashCode() {
int hash = servei == null ? 1 : servei.getId();
return hash;
}
#Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof Espai)) {
return false;
}
Espai other = (Espai) obj;
return id != null && id.equals(other.getId());
}
}
Espai after change that provokes the error
#Entity
#Table(name = "a_espai")
public class Espai extends BaseEntity implements Serializable {
private String nom;
#ManyToOne
#JoinColumn(name = "idServei", referencedColumnName = "id")
private Servei servei;
#Override
public int hashCode() {
int hash = 0;
if (servei == null) {
return hash;
} else {
return servei.getId();
}
}
#Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof Espai)) {
return false;
}
Espai other = (Espai) obj;
return getId() != null && getId().equals(other.getId());
}
}
Moviment class where Espai gets the error on eager loading
#Entity
#Table(name = "t_moviment")
public class Moviment extends BaseEntity implements Serializable {
private LocalDate dataInici;
private LocalDate dataFi;
private String observacio;
#ManyToOne
#Basic(optional = false)
#JoinColumn(name = "idEspai", referencedColumnName = "id")
private Espai espai;
...
}
**Espai before change that provokes the error**
#MappedSuperclass
public class BaseEntity {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
#Version
protected Integer version;
public Integer getId() {
return id;
}
}
When a parent entity is persisted/merged via saveAndFlush, it tries to insert a new record for the child entity instead of finding/merging the existing record. This causes a SQLIntegrityConstraintViolationException error. I have also tried pulling the existing entity directly via the DAO, setting that to be the field in the parent entity, and then saving and flushing, and it still tries to insert a new record for the child entity field.
Any help is greatly appreciated!
Child Entity
#Entity
#Table(name = "DROPDOWN_TYPE", uniqueConstraints = {
#UniqueConstraint(columnNames = { "DROPDOWN_TYPE_TXT" }, name = "DROPDOWN_TYPE_TXT_UK") })
public class DropdownType {
#Id
#Column(name = "DROPDOWN_TYPE_TXT")
private String text;
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
DropdownType that = (DropdownType) o;
return text.equals(that.text);
}
#Override
public int hashCode() {
return text.hashCode();
}
}
Parent Entity
#Entity
#Table(name = "DROPDOWN", uniqueConstraints = {
#UniqueConstraint(columnNames = { "DROPDOWN_TXT", "DROPDOWN_TYPE_TXT" }, name = "DROPDOWN_UK") })
#JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
public class Dropdown {
#Id
#GeneratedValue(strategy = GenerationType.AUTO, generator = "DROPDOWN_OPTION_ID_GENERATOR")
#SequenceGenerator(allocationSize = 1, name = "DROPDOWN_OPTION_ID_GENERATOR", sequenceName = "DROPDOWN_OPTION_ID_SQ")
#Column(name = "DROPDOWN_OPTION_ID")
private Long id;
#ManyToOne(cascade = { CascadeType.MERGE, CascadeType.PERSIST })
#JoinColumn(name = "DROPDOWN_TYPE_TXT", foreignKey = #ForeignKey(name = "DROPDOWN_TYPE_TXT_FK"))
private DropdownType dropdownType;
#Column(name = "DROPDOWN_TXT")
private String text;
#Column(name = "ACTIVE_FLG")
private Boolean active;
#Column(name = "LEGACY_FLG")
private Boolean legacy;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public DropdownType getDropdownType() {
return dropdownType;
}
public void setDropdownType(DropdownType dropdownType) {
this.dropdownType = dropdownType;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public Boolean isActive() {
return active;
}
public void setActive(Boolean active) {
this.active = active;
}
public Boolean isLegacy() {
return legacy;
}
public void setLegacy(Boolean legacy) {
this.legacy = legacy;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Dropdown dropdown = (Dropdown) o;
return dropdownType.equals(dropdown.dropdownType) && text.equals(dropdown.text);
}
#Override
public int hashCode() {
int result = dropdownType != null ? dropdownType.hashCode() : 0;
result = 31 * result + (text != null ? text.hashCode() : 0);
return result;
}
}
If you are using hibernate as your JPA provider, be careful when you override equals and hashcode -- see this post
It may be, that your JPA provider does not consider your entities to be equal as loaded entities can be some CGLIB proxies in reality (probably better to use instanceof than to compare classes).
I have query problem when trying to use entities with bidirectional associations.
I have an entity Wallet that has some relations to two other entities. There is a problem with the relation to the entity WalletBranchOffice. If I comment this part of code, everything works fine. Here are my entities:
Wallet.java
#Entity
#Table(name="WALLET", schema=SchemasConfig.SCHEMA_NEW)
#Cacheable(true)
#Cache(usage=CacheConcurrencyStrategy.READ_ONLY)
public class Wallet implements Serializable {
private static final long serialVersionUID = 3307006915060155334L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="WALLET_ID")
private Integer walletId;
public Integer getWalletId() {
return walletId;
}
#Column(name="INTERNAL_REFERENCE", nullable=false, length=32)
private String internalReference;
public String getInternalReference() {
return internalReference;
}
#ManyToOne(fetch=FetchType.EAGER)
#JoinColumn(name="CURRENCY_ID", nullable=false)
private Currency currency;
public Currency getCurrency() {
return currency;
}
#Column(name = "CACHE_AMOUNT_SUM", nullable = false, precision = 13, scale = 2)
private BigDecimal cacheAmountSum;
public BigDecimal getCacheAmountSum() {
return cacheAmountSum;
}
#OneToMany(mappedBy="wallet", fetch=FetchType.EAGER)
#MapKeyColumn(name="BRANCH_OFFICE_ID")
#Cache(usage=CacheConcurrencyStrategy.READ_ONLY)
private Map<Integer, WalletBranchOffice> walletBranchOffices;
public Map<Integer, WalletBranchOffice> getWalletBranchOffices() {
return walletBranchOffices;
}
#OneToMany(mappedBy="wallet", fetch=FetchType.EAGER)
#MapKeyColumn(name="WALLET_PREV_ID")
#Cache(usage=CacheConcurrencyStrategy.READ_ONLY)
/*
* wallets which must be used before current wallet
*/
private Map<Integer, WalletDependency> walletDependencies;
public Map<Integer, WalletDependency> getWalletDependencies() {
return walletDependencies;
}
#OneToMany(mappedBy="walletPrev", fetch=FetchType.EAGER)
#MapKeyColumn(name="WALLET_ID")
#Cache(usage=CacheConcurrencyStrategy.READ_ONLY)
/*
* wallets that can be used after current wallet
*/
private Map<Integer, WalletDependency> dependentWallets;
public Map<Integer, WalletDependency> getDependentWallets() {
return dependentWallets;
}
#Column(name = "TEXT_KEY")
private String textKey;
public String getTextKey() {
return textKey;
}
#Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((walletId == null) ? 0 : walletId.hashCode());
return result;
}
#Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Wallet other = (Wallet) obj;
if (walletId == null) {
if (other.walletId != null)
return false;
} else if (!walletId.equals(other.walletId))
return false;
return true;
}
}
WalletBranchOffice.java
#Entity
#Table(name="WALLET_BRANCH_OFFICE", schema=SchemasConfig.SCHEMA_NEW)
#Cacheable
#Cache(usage=CacheConcurrencyStrategy.READ_ONLY)
#Immutable
public class WalletBranchOffice implements Serializable {
private static final long serialVersionUID = 9135909966091486878L;
#Id
#Column(name="WALLET_BRANCH_OFFICE_ID")
private Integer walletBranchOfficeId;
public Integer getWalletBranchOfficeId() {
return walletBranchOfficeId;
}
#ManyToOne(fetch=FetchType.EAGER)
#JoinColumn(name="WALLET_ID", nullable=false)
private Wallet wallet;
public Wallet getWallet() {
return wallet;
}
#ManyToOne(fetch=FetchType.EAGER)
#JoinColumn(name="BRANCH_OFFICE_ID", nullable=false)
private BranchOffice branchOffice;
public BranchOffice getBranchOffice() {
return branchOffice;
}
#Column(name="CREATE DATETIME")
#Type(type="com.uniqagroup.ims.common.EETDateType$TimestampType")
private Timestamp createDatetime;
public Timestamp getCreateDatetime() {
return createDatetime;
}
}
Here is WalletDependency.java with which there is no problem.
#Entity
#Table(name="WALLET_DEPENDENCY",schema=SchemasConfig.SCHEMA_NEW)
#Cacheable
#Cache(usage=CacheConcurrencyStrategy.READ_ONLY)
#Immutable
public class WalletDependency implements Serializable {
private static final long serialVersionUID = -6665047739101469610L;
#Id
#Column(name="WALLET_DEPENDENCY_ID")
private Integer walletRequiredId;
public Integer getWalletRequiredId() {
return walletRequiredId;
}
#ManyToOne(fetch=FetchType.EAGER)
#JoinColumn(name="WALLET_ID", nullable=false)
private Wallet wallet;
public Wallet getWallet() {
return wallet;
}
#ManyToOne(fetch=FetchType.EAGER)
#JoinColumn(name="WALLET_PREV_ID",nullable=false)
private Wallet walletPrev;
public Wallet getWalletPrev() {
return walletPrev;
}
}
And my problem is that if I perform even a simple select query like:
List<Wallet> wallets = em.createQuery("FROM Wallet AS w",Wallet.class).getResultList();
with EntityManager, I'm getting a SQL syntax error:
Caused by: java.sql.SQLSyntaxErrorException: [SQL0199] Keyword AS not expected. Valid tokens: , FROM INTO.
at com.ibm.as400.access.JDError.createSQLExceptionSubClass(JDError.java:852) [jt400-7.9_jdbc4.0.jar:JTOpen 7.9]
at com.ibm.as400.access.JDError.throwSQLException(JDError.java:692) [jt400-7.9_jdbc4.0.jar:JTOpen 7.9]
at com.ibm.as400.access.JDError.throwSQLException(JDError.java:662) [jt400-7.9_jdbc4.0.jar:JTOpen 7.9]
at com.ibm.as400.access.AS400JDBCStatement.commonPrepare(AS400JDBCStatement.java:1763) [jt400-7.9_jdbc4.0.jar:JTOpen 7.9]
at com.ibm.as400.access.AS400JDBCPreparedStatement.<init>(AS400JDBCPreparedStatement.java:354) [jt400-7.9_jdbc4.0.jar:JTOpen 7.9]
at com.ibm.as400.access.AS400JDBCConnection.prepareStatement(AS400JDBCConnection.java:2166) [jt400-7.9_jdbc4.0.jar:JTOpen 7.9]
at com.ibm.as400.access.AS400JDBCConnection.prepareStatement(AS400JDBCConnection.java:2108) [jt400-7.9_jdbc4.0.jar:JTOpen 7.9]
at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.doPrepareStatement(BaseWrapperManagedConnection.java:732)
at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.prepareStatement(BaseWrapperManagedConnection.java:707)
at org.jboss.jca.adapters.jdbc.WrappedConnection.prepareStatement(WrappedConnection.java:404)
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:161) [hibernate-core-4.2.0.Final-redhat-1.jar:4.2.0.Final-redhat-1]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:182) [hibernate-core-4.2.0.Final-redhat-1.jar:4.2.0.Final-redhat-1]
... 163 more
No need for AS:
List<Wallet> wallets = em.createQuery("FROM Wallet w",Wallet.class).getResultList();
Some examples:
http://docs.oracle.com/javaee/6/tutorial/doc/bnbrg.html
Thank you for your replays!!! After printing out generated SQL I found the problem. It is just a stupid technical error. There is missing "_" sign in mapping createDatetime property to create_datetime column in WalletBranchOffice entity.
#Column(name="CREATE DATETIME")
I have three entities: Account, AccountAttribut and Attribut. Account and Attribut are associated via AccountAttribut in a many-to-many relationship like it is described here (1). AccountAttribut is a join table entity that holds an additional attribute.
I try to build a HQL string that delivers all Accounts with the "wert"-property "John" in AccountAttribut and the name-property "FirstName" in Attribut.
I dont find the right HQL string. Can you help me out?
(1): http://giannigar.wordpress.com/2009/09/04/mapping-a-many-to-many-join-table-with-extra-column-using-jpa/ "Mapping a many-to-many join table with extra column using JPA"
I tried this query:
List<Account> queried_accounts = HibernateUtils.queryList(
session.createQuery(""
+ "from Account as acc"
+ " full join acc.accountAttributes as accAtt"
+ " inner join accAtt.aa_pk.attribut as attr"
+ " where attr.name='FirstName' and accAtt.wert='John'")
);
and i get this error message:
ERROR: You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near 'full outer join account_attribut accountatt1_ on
account0_.account_id=accountatt' at line 1
UPDATE:
I changed the query to:
List<Account> queried_accounts = HibernateUtils.queryList(
session.createQuery(""
+ "from Account as acc"
+ " inner join acc.accountAttributes as accAtt"
+ " inner join accAtt.aa_pk.attribut as attr"
+ " where attr.name='FirstName' and accAtt.wert='John'")
);
This seems to work.
But now i got a new Problem: queried_accounts does not seem to be a List of Accounts. If i get an object out of queried_accounts and try to apply account methods on it, i get an Exception at runtime.
java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to
com.computacenter.qct.pojos.Account
These are relevant code extracts:
Account:
#Entity
#Table(name = "account")
public class Account {
private Long accountId;
private List<AccountAttribut> accountAttributes = new LinkedList<AccountAttribut>();
private Person person;
private Zielsystem zielsystem;
public Account() {
}
#Id
#GeneratedValue
#Column(name = "account_id", nullable = false)
public Long getAccountId() {
return accountId;
}
public void setAccountId(Long accountId) {
this.accountId = accountId;
}
#OneToMany(fetch = FetchType.LAZY, mappedBy = "aa_pk.account", cascade = {
CascadeType.PERSIST, CascadeType.MERGE })
#Cascade({ org.hibernate.annotations.CascadeType.SAVE_UPDATE,
org.hibernate.annotations.CascadeType.DELETE_ORPHAN })
public List<AccountAttribut> getAccountAttributes() {
return accountAttributes;
}
public void setAccountAttributes(List<AccountAttribut> accountAttribute) {
this.accountAttributes = accountAttribute;
}
#ManyToOne
#JoinColumn(name = "person_id")
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}
#ManyToOne
#JoinColumn(name="zielsystem_id")
public Zielsystem getZielsystem() {
return zielsystem;
}
public void setZielsystem(Zielsystem zielsystem) {
this.zielsystem = zielsystem;
}
}
AccountAttribut:
#Entity
#Table(name="account_attribut")
#AssociationOverrides({
#AssociationOverride(name="aa_pk.account", joinColumns = #JoinColumn(name="account_id")),
#AssociationOverride(name="aa_pk.attribut", joinColumns = #JoinColumn(name="attribut_id"))
})
public class AccountAttribut {}
private AccountAttributPk aa_pk = new AccountAttributPk();
#Column(name="wert")
private String wert;
#EmbeddedId
public AccountAttributPk getAa_pk() {
return aa_pk;
}
public void setAa_pk(AccountAttributPk aa_pk) {
this.aa_pk = aa_pk;
}
#Transient
public Account getAccount() {
return getAa_pk().getAccount();
}
public void setAccount(Account account) {
getAa_pk().setAccount(account);
}
#Transient
public Attribut getAttribut() {
return getAa_pk().getAttribut();
}
public void setAttribut(Attribut attribut) {
getAa_pk().setAttribut(attribut);
}
public String getWert() {
return wert;
}
public void setWert(String wert) {
this.wert = wert;
}
public boolean equals(Object o) {
if (this== o) return true;
if (o ==null|| getClass() != o.getClass()) return false;
AccountAttribut that = (AccountAttribut) o;
if (getAa_pk() !=null?!getAa_pk().equals(that.getAa_pk()) : that.getAa_pk() !=null) return false;
return true;
}
public int hashCode() {
return (getAa_pk() !=null? getAa_pk().hashCode() : 0);
}
}
AccountAttributPk:
public class AccountAttributPk implements Serializable {
private static final long serialVersionUID = -1551814445010872872L;
private Account account;
private Attribut attribut;
#ManyToOne
public Account getAccount() {
return account;
}
public void setAccount(Account account) {
this.account = account;
}
#ManyToOne
public Attribut getAttribut() {
return attribut;
}
public void setAttribut(Attribut attribut) {
this.attribut = attribut;
}
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
AccountAttributPk that = (AccountAttributPk) o;
if (account != null ? !account.equals(that.account) : that.account != null)
return false;
if (attribut != null ? !attribut.equals(that.attribut)
: that.attribut != null)
return false;
return true;
}
public int hashCode() {
int result;
result = (account != null ? account.hashCode() : 0);
result = 31 * result + (attribut != null ? attribut.hashCode() : 0);
return result;
}
}
Attribut
#Entity
#Table(name="Attribut")
public class Attribut {
private Long attributId;
private String name;
private List<PersonAttribut> personenAttribute = new LinkedList<PersonAttribut>();
private List<AccountAttribut> accountAttribute = new LinkedList<AccountAttribut>();
private List<BerechtigungsobjektAttribut> berechtigungsobjektAttribute = new LinkedList<BerechtigungsobjektAttribut>();
public Attribut() {}
public Attribut(String name) {
this.name = name;
}
#Id
#GenericGenerator(name="generator", strategy="increment")
#GeneratedValue(generator="generator")
#Column(name="attribut_id", nullable=false)
public Long getAttributId() {
return attributId;
}
public void setAttributId(Long attributId) {
this.attributId = attributId;
}
#Column(name="name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#OneToMany(fetch = FetchType.LAZY, mappedBy = "pa_pk.attribut", cascade = {CascadeType.PERSIST, CascadeType.MERGE})
#Cascade({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.DELETE_ORPHAN})
public List<PersonAttribut> getPersonenAttribute() {
return personenAttribute;
}
public void setPersonenAttribute(List<PersonAttribut> personenAttribute) {
this.personenAttribute = personenAttribute;
}
#OneToMany(fetch = FetchType.LAZY, mappedBy = "aa_pk.attribut", cascade = {CascadeType.PERSIST, CascadeType.MERGE})
#Cascade({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.DELETE_ORPHAN})
public List<AccountAttribut> getAccountAttribute() {
return accountAttribute;
}
public void setAccountAttribute(List<AccountAttribut> accountAttribute) {
this.accountAttribute = accountAttribute;
}
#OneToMany(fetch = FetchType.LAZY, mappedBy = "ba_pk.attribut", cascade = {CascadeType.PERSIST, CascadeType.MERGE})
#Cascade({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.DELETE_ORPHAN})
public List<BerechtigungsobjektAttribut> getBerechtigungsobjektAttribute() {
return berechtigungsobjektAttribute;
}
public void setBerechtigungsobjektAttribute(
List<BerechtigungsobjektAttribut> berechtigungsobjektAttribute) {
this.berechtigungsobjektAttribute = berechtigungsobjektAttribute;
}
#Override
public String toString() {
return name;
}
#Override
public boolean equals(Object other) {
if (other == null)
return false;
if (this == other)
return true;
if (this.getClass() != other.getClass())
return false;
final Attribut otherAccount = (Attribut) other;
return EqualsUtils.nullSafeEquals(this.getName(), otherAccount.getName());
}
#Override
public int hashCode() {
final int PRIME = 42;
return this.name.hashCode() * PRIME;
}
}