How I make this type - in database is Y for true and null for false ?

regards

Use a UserType.

I do - hibernate return warning now
WARN net.sf.hibernate.type.CustomType - custom type does not implement Serializable: class yu.co.snpe.hibernate.YesOrNullUserType

It work fine (I guess) - can custom type be primitive ?


regards

If it's warning you about implementing serializable, then why not just implement Serializable?

I can't implement Serializable for primitive type

It's not the 'boolean' type that must implement Serializable, it's the object that implements UserType that must implement Serializable (in your case yu.co.snpe.hibernate.YesOrNullUserType )

It don't help me - I try implements Serializable in my user type, but CustomType call returnedClass and check interface for this class - it isn't important what my user type implements

regards

Try placing Serializable as the first implements clause. All others follow it. This should stop the warning message.

David,
It isn't work - CustomType class check returnedClass (boolean.class), not my user type.
Class work fine - I test, load, save, delete
This is class :

package yu.co.snpe.hibernate;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

import net.sf.hibernate.HibernateException;
import net.sf.hibernate.UserType;
import net.sf.hibernate.util.EqualsHelper;

public class YesOrNullUserType implements Serializable,UserType {

private final String stringTrue = "Y";

public int[] sqlTypes() {
return new int[] { Types.VARCHAR };
}

public Class returnedClass() {
return boolean.class;
}

public boolean equals(Object x, Object y) throws HibernateException {
return EqualsHelper.equals(x, y);
}

public Object nullSafeGet(ResultSet rs, String[] names, Object owner)
throws HibernateException, SQLException {
String val = rs.getString(names[0]);
if (null != val && val.equals(stringTrue))
return (new Boolean(true));

return new Boolean(false);
}

public void nullSafeSet(PreparedStatement st, Object value, int index)
throws HibernateException, SQLException {
if (((Boolean) value).booleanValue())
st.setString(index, stringTrue);
else
st.setNull(index, Types.VARCHAR);
}

public Object deepCopy(Object value) throws HibernateException {
return value;
}

public boolean isMutable() {
return false;
}

}

regards

You wrote:


but then


Did you really mean:

I can't return primitive type in nullSafeGet, because return type is Object

I don't know can I use primitive type in User Type, but this class wokr with warning

My question is : is it correct - I know that I can do work with Boolean

regards