# Friday, June 06, 2008

Primitive types as fields in an JPA Entity

The JPA spec supports primitive types as @Columns. What they don't say (assuming Hibernate is the implementation (maybe TopLink does that too)) is that this column becomes nullable = false and the default value is the default for the primitive type. And that is so, even though the @Column(nullable by default is true.


So

@Entity
public class Person {
    private int age;
    private boolean male;

actually means
@Entity
public class Person {
    @Column( nullable = false )
    private int age = 0;
    @Column( nullable = false )
    private boolean male = false;

So watch out.

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