ClassCastException when store object

paan · **Posted:** Sun Oct 12, 2003 4:37 pm

Hi.

When I store object with session.save(people); It cause an exception

java.lang.ClassCastException
at net.sf.hibernate.type.CharacterType.set(CharacterType.java:32)
at net.sf.hibernate.type.NullableType.nullSafeSet(NullableType.java:46)
at net.sf.hibernate.type.NullableType.nullSafeSet(NullableType.java:31)
at net.sf.hibernate.persister.EntityPersister.dehydrate(EntityPersister.java:371)
at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.java:503)
at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.java:444)
at net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:717)
at net.sf.hibernate.impl.SessionImpl.save(SessionImpl.java:605)
at persistance.UseHibernate.main(UseHibernate.java:42)

I use hibernate provided connection on mysql and my code an xml are

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 2.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping>
    <class name="persistance.People" table="people">
        <id name="id" type="integer" column="peopleid">
            <generator class="native"/>
        </id>
        <property name="name" column="name" type="character" not-null="true"/>
        <property name="birthDate" column="birthdate" type="date" not-null="true"/>
    </class>
</hibernate-mapping>

Code:

public class UseHibernate {
    public static void main(String[] args) throws HibernateException {
        Configuration cfg = null;
        try {
            cfg = new Configuration().addFile("D:/IdeaProjects" +
                    "/Projects/restaurant/Prototype/hibernate/People.hbm.xml");
        } catch (MappingException e) { }


        SessionFactory sessionFactory = null;
        sessionFactory = cfg.buildSessionFactory();

        Session session = null;
        session = sessionFactory.openSession();

        People people = new People();
        people.setName("Paan");
        people.setBirthDate(Calendar.getInstance().getTime());

        session.save(people);
        session.close();
    }
}

Code:

public class People {
    private int id;
    private String name;
    private Date birthDate;


    private int getId() {
        return id;
    }
    
    private void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Date getBirthDate() {
        return birthDate;
    }

    public void setBirthDate(Date birthDate) {
        this.birthDate = birthDate;
    }
}

Please tell me what I done wrong.

Best Regard

christian · **Posted:** Sun Oct 12, 2003 4:39 pm

'name' is a String typed property, not a character.

paan · **Posted:** Sun Oct 12, 2003 5:23 pm

Thanks for your help but still I can't store object to database.

runtime output is

[code]13

christian · **Posted:** Sun Oct 12, 2003 5:24 pm

You are not committing any transaction. Please read the Quickstart tutorial.

paan · **Posted:** Mon Oct 13, 2003 1:37 am

Thanks a lot but I have some question. Is Hibernate need me to begin and commit transaction every time I want to manipulate object. Ref doc said it was optional.

christian · **Posted:** Mon Oct 13, 2003 2:25 am

Using the Hibernate Transaction API is optional, at least you have to commit the JDBC connection without.

Yes, you need a transaction, even for read-only operations. No, it is not faster without.