Can not set java.lang.Integer field to java.lang.Integer

Question

User declaration:

@Entity
public class User {
    @Id
    @GeneratedValue
    private Integer id;
    ....

Pattern declaration:

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Answer 1

You need to modify your query as follows:

from UserPattern where user.id = :user_id and pattern.id = :pattern_id

In your query, you are trying to match a User object with an Integer object.

Answer 2

i think maybe your annotation should be

@ManyToOne(TargetEntity=....class)

Answer 3

What happens if you change your HQL query to from UserPattern where user.id = :user_id and pattern.id = :pattern_id?

I think Hibernate is confusing objects and ID fields.

Answer 4

If your field name is "id", your getter and setter methods should be named

public Integer getId(){return id;}
public void setId(Integer id){this.id = id};

If your are using Eclipse, generate the getter/setter by right click -> Source -> Generate Getters and Setters...

Make sure your getters and setter are public. Also you should add @Table-Annotation to all your Entities