NoSuchMethodError with ManyToMany and ManyToOne

[Mirko Bonasorte]

Greetings,

I'm using EJB 3 annotations with JBoss and I have a strange problem:
Suppose that I have two classes, A and B.
Suppose that I have a ManyToOne from A to B, bidirectional.
If I try to invoke A.getB(), I get a NoSuchMethodError.
So, I tried to check the methods of my class and results that getB() returns java.lang.String, and NOT B. So, using ejbQL, I can read this field, but as string ("select a.B from A a" -> List<String> .

The strange thing is that the A.getClass() method gives the correct class name and B.getAs() returns correctly a List<A>.

    Class A:
     
    @ManyToOne(cascade={CascadeType.ALL})
    @JoinColumn(name="b_column")
    public B getB() ...
     
    Class B:
     
    @OneToMany(mappedBy("b")
    public List<A> getAs() ....
 

I get a similar problem when I create a many-to-many unidirectional from A to B: in this case, no such List<B> getB() method results in A, so that I get a NoSuchMethodError, as above.

Thanks a lot in advances!

P.S. I'm working with JBoss 4.2.0

[Mirko Bonasorte]

Hi,
I've also tried with a simple OneToOne unidirectional.
The result is the same.

Watching the jboss logs, it seems that it completely ignores the getter method for the OneToOne.

Here it's the stuff:

 
Ricetta.class:
 
@Entity
@Table(name="ricetta")
public class Ricetta {
    private String cod;
    private String des;
    private User owner;
    private int tempoPreparazione;
    private Date dataInserimento;
    private Set<Ingrediente> ingredienti;
    private Preparazione preparazione;
 
    @Id
    @Column(name="cod")
    public String getCod() {
        return cod;
    }
    public void setCod(String cod) {
        this.cod = cod;
    }
 
    @Column(name="data_ins", nullable=false)
    public Date getDataInserimento() {
        return dataInserimento;
    }
 
    public void setDataInserimento(Date dataInserimento) {
        this.dataInserimento = dataInserimento;
    }
 
    @Column(name="des")
    public String getDes() {
        return des;
    }
    public void setDes(String des) {
        this.des = des;
    }
 
    @ManyToOne(cascade={CascadeType.ALL}, targetEntity=User.class)
    @JoinColumn(name="owner")
    public User getOwner() {
        return owner;
 public void setOwner(User owner) {
        this.owner = owner;
    }
 
    @Column(name="tempo_preparazione")
    public int getTempoPreparazione() {
        return tempoPreparazione;
    }
    public void setTempoPreparazione(int tempoPreparazione) {
        this.tempoPreparazione = tempoPreparazione;
    }
 
    @Transient
    public int getCippaLippa() {
        return 0;
    }
    public void setCippaLippa(int cippaLippa) {
 
    }
 
    @ManyToMany(cascade=CascadeType.ALL)
    @JoinTable(
            name="ingredienti_ricette",
            joinColumns={@JoinColumn(name="cod_ricetta")},
            inverseJoinColumns={@JoinColumn(name="cod_ingrediente")})
    public Set<Ingrediente> getIngredienti() {
        return ingredienti;
    }
 
    public void setIngredienti(Set<Ingrediente> ingredienti) {
        this.ingredienti = ingredienti;
    }
 
    @OneToOne(cascade={CascadeType.ALL})
    @PrimaryKeyJoinColumn
    public Preparazione getPreparazione() {
        return preparazione;
    }
    public void setPreparazione(Preparazione preparazione) {
        this.preparazione = preparazione;
    }
 
Preparazione.class
@Entity
@Table(name="preparazione")
public class Preparazione {
    private String cod;
    private String preparazione;
 
    @Id
    @Column(name="cod")
    public String getCod() {
        return cod;
    }
    public void setCod(String cod) {
        this.cod = cod;
    }
 
    @Column(name="preparazione")
    @Lob
    public String getPreparazione() {
        return preparazione;
    }
    public void setPreparazione(String preparazione) {
        this.preparazione = preparazione;
    }
}
 
persistence.xml
<persistence>
    <persistence-unit name="ciboinscatola">
        <jta-data-source>java:/ciboinscatola</jta-data-source>
    </persistence-unit>
</persistence>
 
JBoss logs:
2007-11-16 07:25:50,870 INFO  [org.hibernate.cfg.annotations.EntityBinder] Bind entity it.ciboinscatola.dataobject.Ricetta on table RICETTA
2007-11-16 07:25:50,871 DEBUG [org.hibernate.cfg.AnnotationBinder] Processing it.ciboinscatola.dataobject.Ricetta property annotation
2007-11-16 07:25:50,872 DEBUG [org.hibernate.cfg.AnnotationBinder] Processing annotations of it.ciboinscatola.dataobject.Ricetta.cod
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.Ejb3Column] Binding column cod unique false
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.AnnotationBinder] cod is an id
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.annotations.SimpleValueBinder] building SimpleValue for cod
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.annotations.PropertyBinder] Building property cod
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.AnnotationBinder] Bind @Id on cod
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.AnnotationBinder] Processing annotations of it.ciboinscatola.dataobject.Ricetta.owner
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.Ejb3Column] Binding column owner unique false
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.annotations.PropertyBinder] binding property owner with lazy=false
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.annotations.SimpleValueBinder] building SimpleValue for owner
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.annotations.PropertyBinder] Building property owner
2007-11-16 07:25:50,873 DEBUG [org.hibernate.cfg.AnnotationBinder] Processing annotations of it.ciboinscatola.dataobject.Ricetta.dataInserimento
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.Ejb3Column] Binding column data_ins unique false
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.annotations.PropertyBinder] binding property dataInserimento with lazy=false
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.annotations.SimpleValueBinder] building SimpleValue for dataInserimento
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.annotations.PropertyBinder] Building property dataInserimento
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.AnnotationBinder] Processing annotations of it.ciboinscatola.dataobject.Ricetta.des
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.Ejb3Column] Binding column des unique false
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.annotations.PropertyBinder] binding property des with lazy=false
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.annotations.SimpleValueBinder] building SimpleValue for des
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.annotations.PropertyBinder] Building property des
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.AnnotationBinder] Processing annotations of it.ciboinscatola.dataobject.Ricetta.tempoPreparazione
2007-11-16 07:25:50,874 DEBUG [org.hibernate.cfg.Ejb3Column] Binding column tempo_preparazione unique false
2007-11-16 07:25:50,875 DEBUG [org.hibernate.cfg.annotations.PropertyBinder] binding property tempoPreparazione with lazy=false
2007-11-16 07:25:50,875 DEBUG [org.hibernate.cfg.annotations.SimpleValueBinder] building SimpleValue for tempoPreparazione
2007-11-16 07:25:50,875 DEBUG [org.hibernate.cfg.annotations.PropertyBinder] Building property tempoPreparazione

In this situation, Ricetta.getPreparazione() invocation gives 'NoSuchMethodError'. Moreover, in JBoss logs, nothing is found about my 'preparazione' property.

Thanks a lot!

[Mirko Bonasorte]

That's it!
The problem was that, for previous experiments, I had deployed an old version of my persistence unit, where my classes had no one-to-one/many-to-one.
Removing it, all went ok!