I am following this titorial on roseindia to get basics of Hibernate : "http://roseindia.net/hibernate/hibernate-update.shtml"
My code is as below and getting the error for the same. Please assist me to fix it!
Java Code:
public class UpdateExample {
/**
* #param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Session sess = null;
try {
SessionFactory fact = new Configuration().configure().buildSessionFactory();
sess = fact.openSession();
Transaction tr = sess.beginTransaction();
Insurance ins = (Insurance)sess.get(Insurance.class, new Long(1));
ins.setInsuranceName("Jivan Dhara");
ins.setInvestementAmount(20000);
ins.setInvestementDate(new Date());
sess.update(ins);
tr.commit();
sess.close();
System.out.println("Update successfully!");
}
catch(Exception e){
System.out.println(e.getMessage());
}
}
}
And
public class Insurance {
private String insuranceName;
private double investementAmount;
private Date investementDate;
public String getInsuranceName() {
return insuranceName;
}
public void setInsuranceName(String insuranceName) {
this.insuranceName = insuranceName;
}
public double getInvestementAmount() {
return investementAmount;
}
public void setInvestementAmount(double investementAmount) {
this.investementAmount = investementAmount;
}
public Date getInvestementDate() {
return investementDate;
}
public void setInvestementDate(Date investementDate) {
this.investementDate = investementDate;
}
}
And my contact.hbm.xml :
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Contact" table="CONTACT">
<id name="id" type="long" column="ID" >
<generator class="assigned"/>
</id>
<property name="firstName">
<column name="FIRSTNAME" />
</property>
<property name="lastName">
<column name="LASTNAME"/>
</property>
<property name="email">
<column name="EMAIL"/>
</property>
</class>
<class name="Book" table="book">
<id name="lngBookId" type="long" column="id" >
<generator class="increment"/>
</id>
<property name="strBookName">
<column name="bookname" />
</property>
</class>
<class name="Insurance" table="insurance">
<id name="insuranceName" type="String" column="InsuranceName" >
/>
</id>
<property name="investmentAmount">
<column name="InvestmentAmount" />
</property>
<property name="investmentDate">
<column name="InvestmentDate" />
</property>
</class>
</hibernate-mapping>
And the error i am getting is:
"Error reading resource: contact.hbm.xml"
Also I have created db table by name Insurance with those column fields.
Thanks
Sneha
Isn't something missing in the hbm.xml file? It isn't a complete XML file.
You need to place the hbm.xml file together with the compiled class file for your class.
Is this your whole .hbm.xml file? If so, it's incomplete - it lacks proper structure shown here: http://roseindia.net/hibernate/hibernateormapping.shtml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="roseindia.tutorial.hibernate.Contact" table="CONTACT">
<id name="id" type="long" column="ID" >
<generator class="assigned"/>
</id>
<property name="firstName">
<column name="FIRSTNAME" />
</property>
<property name="lastName">
<column name="LASTNAME"/>
</property>
<property name="email">
<column name="EMAIL"/>
</property>
</class>
</hibernate-mapping>
you have to define two POJO classes
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping
PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Book" table="book" >
<id name="lngBookId" column="id" type="long">
<generator class="increment"></generator>
</id>
<property name="strBookName" type="string">
<column name="bookname" sql-type="VARCHAR2(55)"/>
</property>
</class>
<class name="Insurance" table="insurance" >
<property name="firstName" type="string">
<column name="FIRSTNAME" sql-type="VARCHAR2(55)"/>
</property>
<property name="lastName" type="string">
<column name="LASTNAME" sql-type="VARCHAR2(55)"/>
</property>
<property name="email" type="string">
<column name="EMAIL" sql-type="VARCHAR2(55)"/>
</property>
</class>
</hibernate-mapping>
Related
I am getting ClassCastException: at.sheldor5.tr.api.time.RecordType cannot be cast to java.lang.Boolean because Hibernate 5.2.9.FINAL completly ignores my converter:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="at.sheldor5.tr.api.time">
<class name="Record" table="RECORDS">
<id name="id" type="int" column="PK_RECORD_ID">
<generator class="native"/>
</id>
<many-to-one name="user" column="FK_USER_MAPPING_ID" class="at.sheldor5.tr.api.user.UserMapping"/>
<property name="date" type="java.time.LocalDate" column="DATE" index="I_DATE"/>
<property name="time" type="java.time.LocalTime" column="TIME"/>
<property name="type" type="boolean" column="TYPE">
<type name="at.sheldor5.tr.persistence.converter.RecordTypeAttributeConverter"/>
</property>
</class>
</hibernate-mapping>
Converter:
#Converter
public class RecordTypeAttributeConverter implements AttributeConverter<RecordType, Boolean> {
#Override
public Boolean convertToDatabaseColumn(final RecordType attribute) {
if (attribute == null) {
return null;
}
return attribute.getBoolean();
}
#Override
public RecordType convertToEntityAttribute(final Boolean dbData) {
return RecordType.getType(dbData);
}
}
The only thing I can see is that hibernate ignores my converter because of some random things.
Any suggestions (except clean/rebuild which I already tried or hard reset)?
EDIT: my converter won't even gets loaded ...
I have an object User, which has a List of UserDictionary. Each UserDictionary has a List of UserWords with cascade delete.
User.java
public class User implements Serializable
{
private Long id;
private String login;
private String password;
private String email;
private Boolean isVerified;
private List<UserDictionary> dictionaries = new ArrayList<>();
private UserTrainingSettings settings;
//getters and setters there
}
And mapping User.hbm.xml
<hibernate-mapping>
<class name="User" dynamic-insert="true" dynamic-update="true" table="USER" entity-name="user">
<id name="id" type="java.lang.Long" column="user_id">
<generator class="native"/>
</id>
<property name="login" type="java.lang.String" length="40" not-null="true" unique="true"/>
<property name="password" type="java.lang.String" length="32" not-null="true"/>
<property name="email" type="java.lang.String" length="100" not-null="true"/>
<property name="isVerified" type="java.lang.Boolean" column="verified" not-null="true"/>
<list name="dictionaries" fetch="join">
<key column="user_id" not-null="true" on-delete="cascade"/>
<one-to-many class="com.github.wordsmemoriser.Model.UserDictionary"/>
</list>
<one-to-one name="settings" class="com.github.wordsmemoriser.Model.UserTrainingSettings"
cascade="javax.persistence.CascadeType.REMOVE"/>
</class>
</hibernate-mapping>
UserDictionary.java
public class UserDictionary
{
private Long id;
private User user;
private String name;
private List<UserWords> words = new ArrayList<>();
//getters and setters there
}
And mapping UserDictionary.hbm.xml
<hibernate-mapping>
<class name="UserDictionary" dynamic-insert="true" dynamic-update="true" table="DICTIONARY">
<id name="id" type="java.lang.Long" column="dict_id">
<generator class="native"/>
</id>
<many-to-one name="user" class="com.github.wordsmemoriser.Model.User" fetch="join">
<column name="user_id" not-null="true"/>
</many-to-one>
<property name="name" type="java.lang.String" length="100"/>
<list name="words">
<key column="dict_id" not-null="true" on-delete="cascade"/>
<one-to-many class="com.github.wordsmemoriser.Model.UserWords"/>
</list>
</class>
</hibernate-mapping>
What is a proper way to delete all UserDictionaries from User? Should I iterate this list, delete every UserDictionary from database, then clear this list and update User like this
session.beginTransaction();
for(UserDictionary dict : user.getDictionaries())
{
session.delete(dict);
}
user.getDictionaries().clear();
session.update(user);
session.getTransaction().commit();
or should I just clear User's list and then update it like this
user.getDictionaries().clear();
session.beginTransaction();
session.update(user);
session.getTransaction().commit();
I have a question about the creation of database schemes by Hibernate.
In our project we have users and groups. Groups have exactly one owner and can have multiple members. A user can be owner and member of multiple groups.
We came up with the following Hibernate mapping:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="model.User" table="ProductUser">
<id name="id" column="userId">
<generator class="native"/>
</id>
<property name="email"/>
<property name="firstName"/>
<property name="lastName"/>
<set name="ownedUserGroups" table="UserGroup" inverse="true">
<key column="userId"/>
<one-to-many class="model.UserGroup"/>
</set>
<set name="userGroups" table="Members" inverse="false" lazy="true" fetch="select">
<key column="userId"/>
<many-to-many column="userGroupId" class="model.UserGroup"/>
</set>
</class>
<class name="model.UserGroup" table="UserGroup">
<id name="id" column="userGroupId">
<generator class="native"/>
</id>
<property name="name"/>
<many-to-one name="owner" class="model.User" column="owner_UserId"/>
<set name="members" table="Members" inverse="true" lazy="true" fetch="select">
<key column="userGroupId"/>
<many-to-many column="userId" class="model.User"/>
</set>
</class>
</hibernate-mapping>
The database scheme Hibernate creates for us looks the following:
Database scheme created by Hibernate
Can somebody explain why usergroup has the userid as a foreign key? (As you can see in the image)
For the sake of completeness, here is the code for User and UserGroup:
public class User {
private int id;
private String firstName;
private String lastName;
private String email;
private Set<UserGroup> ownedUserGroups;
private Set<UserGroup> userGroups;
public User() {
this.ownedUserGroups = new HashSet<>();
this.userGroups = new HashSet<>();
}
public User(String firstName, String lastName, String email) {
this();
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
}
// getters and setters
}
public class UserGroup {
private int id;
private String name;
private User owner;
private Set<User> members;
public UserGroup() {
this.members = new HashSet<>();
}
public UserGroup(String name, User owner, HashSet<User> members) {
this.name = name;
this.owner = owner;
this.members = members;
}
// getters and setters
}
Ok. The problem is with your many-to-one-mapping. What your doing is your trying to set ownedUserGroups to all the groups where the userId equals the id of the current user. However you need to look for all groups where the owner_UserId equals the id of your user. Basically you just need to replace userId with owner_UserId. Your final mapping file should look like this:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="model.User" table="ProductUser">
<id name="id" column="userId">
<generator class="native"/>
</id>
<property name="email"/>
<property name="firstName"/>
<property name="lastName"/>
<set name="ownedUserGroups" table="UserGroup" inverse="true">
<key column="owner_userid"/> <!-- CHANGED -->
<one-to-many class="model.UserGroup"/>
</set>
<set name="userGroups" table="Members" inverse="false" lazy="true" fetch="select">
<key column="userId"/>
<many-to-many column="userGroupId" class="model.UserGroup"/>
</set>
</class>
<class name="model.UserGroup" table="UserGroup">
<id name="id" column="userGroupId">
<generator class="native"/>
</id>
<property name="name"/>
<many-to-one name="owner" class="model.User" column="owner_UserId"/>
<set name="members" table="Members" inverse="true" lazy="true" fetch="select">
<key column="userGroupId"/>
<many-to-many column="userId" class="model.User"/>
</set>
</class>
</hibernate-mapping>
I have two classes :
Etudiant and Pays
In the database the table Etudiant has a foreign key for the table Pays.
In my code I have something like this :
List<Etudiant> listEtudiants = (List<Etudiant>) etudiantService.getAll();
for(Etudiant etudiant : listEtudiants) {
if(((JTextField)arg0.getSource()).getText().equals(etudiant.getNom())){
System.out.println(etudiant.getPays().getNom());
}
}
but when I run this code it fails with the exception:
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
In the line :
System.out.println(etudiant.getPays().getNom());
Mapping for Etudiant:
<hibernate-mapping>
<class name="tp.ihm.domain.Etudiant" table="etudiant" schema="public" optimistic-lock="version">
<id name="numInsc" type="java.lang.Long">
<column name="num_insc" />
<generator class="assigned" />
</id>
<many-to-one name="pays" class="tp.ihm.domain.Pays" fetch="select">
<column name="pays" not-null="true" />
</many-to-one>
<property name="nom" type="string">
<column name="nom" length="50" not-null="true" />
</property>
<property name="prenom" type="string">
<column name="prenom" length="50" not-null="true" />
</property>
</class>
</hibernate-mapping>
Mapping for Pays:
<hibernate-mapping>
<class name="tp.ihm.domain.Pays" table="pays" schema="public" optimistic-lock="version">
<id name="id" type="java.lang.Long">
<column name="id" />
<generator class="assigned" />
</id>
<property name="nom" type="string">
<column name="nom" length="45" not-null="true" />
</property>
<set name="etudiants" table="etudiant" inverse="true" lazy="true" fetch="select">
<key>
<column name="pays" not-null="true" />
</key>
<one-to-many class="tp.ihm.domain.Etudiant" />
</set>
</class>
</hibernate-mapping>
I tried to remove the fetch attribute in the mapping for Pays, and then to change it's value to eager but nothing works.
Could someone please help me with this ?
Edit :
This is the code for the getAll method :
public List getAll() throws EntityNotFoundException {
// Get the current session
Session s = getSession();
List list = null;
// If the BLL layer started a transaction
// In this case it is the BLL layer that manages the session and transaction
if (anActiveTransactionExist(s)) {
list = s.createCriteria(Etudiant).list();
} else {
LOGGER.debug("DAO initialize its own transaction");
Transaction tx = null;
try {
// Starts a transaction locally
tx = s.beginTransaction();
list = s.createCriteria(boClass).list();
tx.commit();
} catch (RuntimeException ex) {
// Cancel the transaction if there is a problem
handleDaoOpError(tx, ex);
} finally {
closeSession(s);
}
}
if (list == null || list.size() == 0)
throw new EntityNotFoundException();
return list;
}
You need to change the mapping of Etudiant from fetch=select to fetch=join
fetch-“join” = Disable the lazy loading, always load all the collections and entities.
fetch-“select” (default) = Lazy load all the collections and entities.
<many-to-one name="pays" class="tp.ihm.domain.Pays" fetch="join">
<column name="pays" not-null="true" />
</many-to-one>
I have three objects USER, CONTACT and ACTION.
Each USER has many CONTACTS and each CONTACT has many ACTIONS
Each CONTACT and ACTION has status assigned to them, e.g. 20 or 60 or...
Please have a look at the data model.
Requirement is to get the CONTACTs having a particular status, or get the CONTACTs whose ACTIONs have that particular status.
E.g. get me CONTACTs with status 20, or CONTACTs who’s ACTIONs have status 20
At the moment I have the following query that is retrieving the CONTACTs with the status 20 and does not considers that status of the ACTIONs
USER
public class User {
private Integer userID;
private String userFirstName;
private String userLastName;
private Set<Contact> contactSet = new HashSet<Contact>();
private Set<Action> actionSet = new HashSet<Action>();
private ContactCriteria contactCriteria;
.
.
.
}
CONTACT
public class Contact implements Serializable {
private Integer contactID;
private Integer contactStatus = 0;
private String givenName;
private String familyName;
private String streetAddress;
private Set<User> userSet = new HashSet<User>();
private Set<Action> actionSet = new HashSet<Action>();
.
.
.
}
ACTION
public class Action implements Serializable {
private Integer actionID;
private Integer actionStatus;
private User user;
private String actionNote;
private Contact contact;
.
.
.
}
Following are my mapping files:
User.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.smallworks.model" schema="smallworksdb">
<class name="User" table="USERACCOUNT">
<id column="USER_ID" length="500" name="userID">
<generator class="increment"/>
</id>
<property column="USER_FIRSTNAME" generated="never" lazy="false" length="100" name="userFirstName"/>
<property column="USER_LASTNAME" generated="never" lazy="false" length="100" name="userLastName"/>
<set cascade="all" fetch="select" lazy="true" name="contactSet" sort="unsorted" table="USER_CONTACT">
<key column="USER_ID"/>
<many-to-many class="com.smallworks.model.Contact"
column="CONTACT_ID" order-by="CONTACT_ID" unique="false"/>
</set>
<!-- one to many mapping with Action -->
<set inverse="true" lazy="true" name="actionSet" sort="unsorted" order-by="ACTION_DUE_DATE" cascade="save-update">
<key column="USER_ID"/>
<one-to-many class="com.smallworks.model.Action"/>
</set>
<!-- one to one mapping with ContactCriteria -->
<one-to-one name="contactCriteria" class="com.smallworks.model.ContactCriteria"
cascade="save-update" lazy="false"></one-to-one>
</class>
</hibernate-mapping>
Contact.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.smallworks.model" schema="smallworksdb">
<class name="Contact" table="CONTACT">
<id column="CONTACT_ID" length="500" name="contactID">
<generator class="increment"/>
</id>
<property column="GIVEN_NAME" generated="never" lazy="false"
length="100" name="givenName"/>
<property column="FAMILY_NAME" generated="never" lazy="false"
length="100" name="familyName"/>
<property column="STREET_ADDRESS" generated="never" lazy="false"
length="100" name="streetAddress"/>
<property column="CONTACT_STATUS" generated="never" lazy="false"
name="contactStatus" type="integer"/>
<set inverse="true" lazy="false" name="userSet" sort="unsorted" table="USER_CONTACT">
<key column="CONTACT_ID"/>
<many-to-many class="com.smallworks.model.User" column="USER_ID" unique="false"/>
</set>
<!-- one to many mapping with Action -->
<set inverse="true" lazy="true" name="actionSet" sort="unsorted" order-by="ACTION_DUE_DATE" cascade="save-update">
<key column="CONTACT_ID"/>
<one-to-many class="com.smallworks.model.Action"/>
</set>
</class>
</hibernate-mapping>
Action.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.smallworks.model" schema="smallworksdb">
<class name="Action" table="ACTION">
<id column="ACTION_ID" length="500" name="actionID">
<generator class="increment"/>
</id>
<property column="ACTION_STATUS" generated="never" lazy="false"
name="actionStatus" type="integer"/>
<!-- many to one mapping with Contact -->
<many-to-one cascade="save-update"
class="com.smallworks.model.Contact" column="CONTACT_ID" lazy="false"
name="contact" not-null="true" />
<!-- many to one mapping with User -->
<many-to-one class="com.smallworks.model.User" column="USER_ID"
lazy="false" name="user" not-null="true"/>
</class>
</hibernate-mapping>
My existing query is:
Query query = session.createQuery("select distinct c FROM com.smallworks.model.User as u INNER JOIN u.contactSet as c WHERE u.userID=:userIDPara AND c.contactStatus in (:contactStatusPara)");
query.setParameter("userIDPara", user.getUserID());
query.setParameterList("contactStatusPara", statusList);
contactList = query.list();
Add an outer join on c.actions as a and an OR restriction on a.status.
select distinct c FROM com.smallworks.model.User as u INNER JOIN u.contactSet as c LEFT OUTER JOIN c.actionSet a WHERE u.userID=:userIDPara AND (c.contactStatus in (:contactStatusPara) OR a.actionStatus in (: actionStatusPara)