@Data
@Entity
@Table(name = "transaction_line_item_value")
@Builder
@AllArgsConstructor
@NoArgsConstructor
@TypeDefs({
    @TypeDef(name = "rupee-custom",  defaultForType = Rupee.class,  typeClass = RupeeType.class)
})
public class TransactionLineItemValue {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @PodamExclude
    private int id;

    //@Column(name = "amount", nullable = false) Works! But makes amount immutable.
    @Column(name = "amount")
    private Rupee amount;

}

public class RupeeType extends AbstractSingleColumnStandardBasicType<BigDecimal> {

    public RupeeType() {
    super(new RupeeTypeDescriptor(), BigDecimalTypeDescriptor.INSTANCE);
    }

    @Override
    public String getName() {
    return "rupee-custom";
    }

    public static class RupeeTypeDescriptor implements SqlTypeDescriptor {


    @Override
    public int getSqlType() {
        return Types.DOUBLE;
    }

    @Override
    public boolean canBeRemapped() {
        return false;
    }

    @Override
    public <X> ValueBinder<X> getBinder(JavaTypeDescriptor<X> javaTypeDescriptor) {
        return new BasicBinder<X>(javaTypeDescriptor, (SqlTypeDescriptor) this) {

            @Override
            protected void doBind(PreparedStatement preparedStatement, X x, int i, WrapperOptions wrapperOptions) throws SQLException {
                preparedStatement.setBigDecimal(i, ((Rupee) x).getAmount());
            }

            @Override
            protected void doBind(CallableStatement callableStatement, X x, String s, WrapperOptions wrapperOptions) throws SQLException {
                callableStatement.setBigDecimal(s, ((Rupee) x).getAmount());
            }
        };
    }

    @Override
    public <X> ValueExtractor<X> getExtractor(JavaTypeDescriptor<X> javaTypeDescriptor) {
        return new BasicExtractor<X>(javaTypeDescriptor, (SqlTypeDescriptor) this) {

            @Override
            protected X doExtract(ResultSet resultSet, String s, WrapperOptions wrapperOptions) throws SQLException {
                return (X) Rupee.builder().amount(resultSet.getBigDecimal(s)).build();
            }

            @Override
            protected X doExtract(CallableStatement callableStatement, int i, WrapperOptions wrapperOptions) throws SQLException {
                return (X) Rupee.builder().amount(callableStatement.getBigDecimal(i)).build();
            }

            @Override
            protected X doExtract(CallableStatement callableStatement, String s, WrapperOptions wrapperOptions) throws SQLException {
                return (X) Rupee.builder().amount(callableStatement.getBigDecimal(s)).build();
            }
        };
    }
 }

}