How can I map discriminator and property to same database column?

eg.
@Entity
@Table(name = "PARAMETERS")
@Inheritance(
strategy = InheritanceType.SINGLE_TABLE,
discriminatorType=DiscriminatorType.INTEGER,
discriminatorValue = "0"
)
@DiscriminatorColumn(name = "PARAMETER_TYPE")
@Proxy(lazy = false)
class Param {

@Column(name = "PARAMETER_TYPE")
ParameterType type; //ParameteType is enum
}



class ConstantParam extends Param {
Constant cons;
}

class OtherParam extends Param {
Integer other;
}

In above example, i want to map discriminator and property to same column. I am not getting, how can i do this using annotation?
I know, using mapping we can do this by specifying "insert=false" in <discriminator>.

Thanks in advance,
Arpit

@Column(name = "PARAMETER_TYPE", insertable=false, updatable=false)
ParameterType type; //ParameteType is enum
}

Thanks!!
It worked for me!!
I was little bit confused as in mapping file we specify insert=false in <discriminator> but here we specify "insertable=false" in column.