java.lang.AbstractMethodError during createQuery

Question

I am attempting to retrieve a list of results from my database, by following an example in this answer. Howeverm, I keep getting the following error:

java.lang.AbstractMethodError: org.hibernate.ejb.EntityManagerImpl.createQuery(Ljava/lang/String;Ljava/lang/Class;)Ljavax/persistence/TypedQuery;

Here is my code, to denote how I am calling this:

@Entity
@Table(name = "MY_TABLE")
public class CoolsEntity implements Serializable {

    @Id
    @Column(name = "ID", columnDefinition = "Decimal(10,0)")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private String id;

    @Column(name = "COOL_GUY_NAME")
    private String name;

    public String getId() {
        return id;
    }

    public void setId(final String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

This code below generates the error:

final String sql = "select c from CoolsEntity c";
final TypedQuery<CoolsEntity> query = em.createQuery(sql, CoolsEntity.class);
final List<CoolsEntity> results = query.getResultList();
return results;

However, if I do something like this, I can see the results:

final String sql = "select c from CoolsEntity c";
final Query query = em.createQuery(sql);
@SuppressWarnings("unchecked")
final List<CoolsEntity> results = query.getResultList();
return results;

All of the references to em are imported through this package:

import javax.persistence.EntityManager

Shouldn't the two queries above generate the same result? Am I missing a cast to the List interface to allow this to work in the typed query?

Similar problem: http://stackoverflow.com/questions/9860181/abstractmethoderror-when-creating-typed-query-with-hibernate-3-6-3-and-jpa-2-0 — Mechkov, Oct 14 '16 at 13:09

score 4 · Accepted Answer · answered Oct 14 '16 at 13:26

4

You have an AbstractMethodError exception which is thrown when an application tries to call an abstract method.
You have quite a mix of Hibernate and JPA versions.

TypedQuery was introduced in JPA 2.0 and Hibernate implements this specification since 3.5.X

Suggesstion : Use implementation from Hibernate version 3.6.3 (or higher).

answered Oct 14 '16 at 13:26

Rohit Gaikwad

3,677
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ah, I see. My hibernate is on version 3.4. Since I am bound to this version, is there no alternative? – angryip Oct 14 '16 at 13:42
Check this http://hibernate.org/orm/downloads/ you need JPA 1.0 version for hibernate 3.2+ till 3.5+. – Rohit Gaikwad Oct 14 '16 at 13:45
Ah, I am bound to JPA 2 :/ I have to keep it on 2. – angryip Oct 14 '16 at 13:47
Then you have to move on to hibernate 3.5+ (3.6+ will be good). I guess there should not be any issues with this change for you. – Rohit Gaikwad Oct 14 '16 at 13:49

score 1 · Answer 2 · answered Oct 14 '16 at 13:09

1

you are probably using two differnet version of interface EntityManager and implementation EntityManagerImpl.

answered Oct 14 '16 at 13:09

andolsi zied

3,553
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is there a good way I can confirm that these two are different? – angryip Oct 14 '16 at 13:24
with your IDE, search tje jar that containes `EntityManager` and the jar thar containes `EntityManagerImpl`. – andolsi zied Oct 14 '16 at 13:26

java.lang.AbstractMethodError during createQuery

2 Answers2