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ShawnInDenver
 Post subject: problem mapping a List
PostPosted: Tue Apr 07, 2009 12:56 pm 
Beginner
Beginner

Joined: Tue Mar 17, 2009 12:19 pm
Posts: 22
Using Hibernate 3.2 and JPA Annotations, I'm able to map a Set but getting the following exception when I change the same mapping to a List (and adding an @OrderBy).

Code:
Caused by: org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of com.xxx.RelationTarget.target


Here's the OneToMany

Code:
    @OneToMany(targetEntity = com.xxx.RelationTarget.class, mappedBy = "relation", cascade = {CascadeType.REMOVE,
            CascadeType.PERSIST })
    @OrderBy("sequence")
    @org.hibernate.annotations.Cascade(value = org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
    public List<RelationTarget> getTargets() {
        return _relationTargets;
    }


Here's the ManyToOne (that the exception is complaining about)

Code:
    @ManyToOne(targetEntity = com.xxx.Relation.class, cascade = CascadeType.PERSIST)
    @JoinColumn(name = "relationid", insertable = false, updatable = false)
    public Relation getRelation() {
        return _id.getRelation();
    }


Insertable and Updatable are set to false because this class uses an @Embeddable id.

Code:
    @Id
    protected RelationTargetPK getId() {
        return _id;
    }


Here's the @embeddable PK class mapping

Code:
    @ManyToOne(targetEntity = com.hli.redhat.value.Relation.class, cascade = CascadeType.PERSIST)
    @JoinColumn(name = "relationid")
    public Relation getRelation() {
        return _relation;
    }


Thanks!
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parmendratyagi
 Post subject:
PostPosted: Wed Apr 08, 2009 12:39 am 
Regular
Regular

Joined: Thu Sep 06, 2007 2:22 am
Posts: 108
Location: Noida,India
This code is not enough. Please post full code of both entity classes and the primary key class.
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ShawnInDenver
 Post subject:
PostPosted: Fri Apr 10, 2009 10:32 am 
Beginner
Beginner

Joined: Tue Mar 17, 2009 12:19 pm
Posts: 22
Thanks for taking a look into this for me. Here's the Relation Class:

Code:
@Entity
@SecondaryTable(name = "Relations")
@DiscriminatorValue(value = ValueTypeIds.RELATION)
public class Relation extends ELObject {

    private Concept _source;
    private List<RelationTarget> _relationTargets = new ArrayList<RelationTarget>();
    private RelationType _relationType;

    @Transient
    @Override
    public RelationId getId() {
        return (RelationId) super.getId();
    }

    @ManyToOne(targetEntity = com.xxx.Concept.class)
    @JoinColumn(name = "sourceid", table = "Relations")
    public Concept getSource() {
        return _source;
    }

    @OneToMany(targetEntity = com.xxx.RelationTarget.class, mappedBy = "relation", cascade = {CascadeType.REMOVE,
            CascadeType.PERSIST })
    @OrderBy("sequence")
    @org.hibernate.annotations.Cascade(value = org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
    public List<RelationTarget> getTargets() {
        return _relationTargets;
    }

    protected List<RelationTarget> setTargets(List<RelationTarget> targets) {
        _relationTargets = targets;
        return _relationTargets;
    }

    protected Concept setSource(Concept source) {
        _source = source;
        return _source;
    }

    @ManyToOne(targetEntity = com.xxx.RelationType.class)
    @JoinColumn(name = "relationdefinitionid", table = "Relations")
    public RelationType getRelationType() {
        return _relationType;
    }

    protected RelationType setRelationType(RelationType relationType) {
        _relationType = relationType;
        return _relationType;
    }

}


Here's the other entity class, RelationTarget:

Code:
@Entity
@Table(name = "RelationTargets")
public class RelationTarget extends ValueObject {

    private RelationTargetPK _id = new RelationTargetPK();
    private Concept _target;

    @Id
    protected RelationTargetPK getId() {
        return _id;
    }

    protected void setId(RelationTargetPK id) {
        _id = id;
    }

    @ManyToOne(targetEntity = com.xxx.Relation.class, cascade = CascadeType.PERSIST)
    @JoinColumn(name = "relationid", insertable = false, updatable = false)
    public Relation getRelation() {
        return _id.getRelation();
    }

    private void setRelation(Relation relation) {
    }

    @ManyToOne(targetEntity = com.xxx.Concept.class, cascade = CascadeType.PERSIST)
    @JoinColumn(name = "targetid")
    public Concept getTarget() {
        return _target;
    }

    public Concept setTarget(Concept target) {
        _target = target;
        return _target;
    }

    @Column(name = "sequence", insertable = false, updatable = false)
    public int getSequence() {
        return _id.getSequence();
    }

    protected void setSequence(int sequence) throws IllegalArgumentException {
        _id.setSequence(sequence);
    }
}


And here's the PK class:

Code:
@Embeddable
public class RelationTargetPK implements Serializable {

    private Relation _relation;
    private int _sequence;

    @ManyToOne(targetEntity = com.xxx.Relation.class, cascade = CascadeType.PERSIST)
    @JoinColumn(name = "relationid")
    public Relation getRelation() {
        return _relation;
    }

    public Relation setRelation(Relation relation) {
        _relation = relation;
        return _relation;
    }

    @Column(name = "sequence")
    public int getSequence() {
        return _sequence;
    }

    public void setSequence(int sequence) {
        _sequence = sequence;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((_relation == null) ? 0 : _relation.hashCode());
        result = prime * result + _sequence;
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        RelationTargetPK other = (RelationTargetPK) obj;
        if (_relation == null) {
            if (other._relation != null) {
                return false;
            }
        } else if (!_relation.equals(other._relation)) {
            return false;
        }
        if (_sequence != other._sequence) {
            return false;
        }
        return true;
    }

}
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parmendratyagi
 Post subject:
PostPosted: Sat Apr 11, 2009 12:37 pm 
Regular
Regular

Joined: Thu Sep 06, 2007 2:22 am
Posts: 108
Location: Noida,India
Hi, I have modified 2 relation classes (Relation,RelationTarget). Please try with these changes.

Modification in Relation class

Code:
@OrderBy("id.sequence") //set property name in order by clause


Relation Target

Code:
@Entity
@Table(name = "RelationTargets")
public class RelationTarget extends ValueObject {

   private RelationTargetPK _id = new RelationTargetPK();
   private Relation _relation; // ---------------->>>>adding new filed
   private Concept _target;

   @Id
   protected RelationTargetPK getId() {
      return _id;
   }

   protected void setId(RelationTargetPK id) {
      _relation = id.getRelation(); // setting _relation value
      _id = id;
   }

   @ManyToOne(targetEntity = com.xxx.Relation.class, cascade = CascadeType.PERSIST)
   @JoinColumn(name = "relationid", insertable = false, updatable = false)
   public Relation getRelation() {
      return _relation; // ------------------>>>Modified
   }

   private void setRelation(Relation relation) {
   }

   @ManyToOne(targetEntity = com.xxx.Concept.class, cascade = CascadeType.PERSIST)
   @JoinColumn(name = "targetid")
   public Concept getTarget() {
      return _target;
   }

   public Concept setTarget(Concept target) {
      _target = target;
      return _target;
   }

   @Column(name = "sequence", insertable = false, updatable = false)
   public int getSequence() {
      return _id.getSequence();
   }

   protected void setSequence(int sequence) throws IllegalArgumentException {
      _id.setSequence(sequence);
   }
}
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ShawnInDenver
 Post subject:
PostPosted: Mon Apr 13, 2009 12:35 pm 
Beginner
Beginner

Joined: Tue Mar 17, 2009 12:19 pm
Posts: 22
Thanks, Parmendratyagi -

However, that did not change anything. In fact, I have another scenario with a PK class and that one works fine without the "Many" entity having an object reference to the "One" class (i.e. you added "relation" to RelationTarget class).

I tried a simple mapping of a List on an entity that does not have a composite key and it worked fine. So this seems to be having a List mapped in conjunction with the composite key / PK class.

Any other ideas?
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