Calculation of interdependent virtual attributes

[Kjetil Kilhavn]

Use a common subroutine to set both of them and call it when necessary,=
 
otherwise just reading the private variables.
Following your example, use object-privat-hq_set to indicate whether th=
ey
have been set or not.
--
Kjetil Kilhavn
 
 
 
 
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                    Patrice Nolin                                      =
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Hi,
 
I have an object with 2 virtual attributes : hq_A and hq_B
 
 
The formula for hq_A is select table TABLE_X and count every row
The formula for hq_B is select table TABLE_X and count rows meeting a
condition
 
For performance reason, since for hq_A and hq_B I need to access the sa=
me
data, I was thinking to put the code for calculation of hq_A and hq_B i=
n
HQ_A attribute, setting a private variable hq_C and initiating hq_B wit=
h
the
private variable hq_C (see example below):
 
My problem occurs when I use HQ_B before HQ_A because the content of th=
e
private variable is calculated when HQ_A is referenced.
 
Is there another way to calculate my variables, without causing perform=
ance
problems?
Can we trigger the calculation of variables at the instantiation of the=
 
object ?
 
Or what are you suggestion on the matter ?
 
Thanks
 
Pat
 
 
---------------------
 
Example :
 
OBJECT ?
 
(See attached file: private,)?.
 
GET_PROPERTY HQ_B CHANGING CONTAINER.
  SWC_SET_ELEMENT CONTAINER 'hq_b' object-private-hq_c.
END_PROPERTY.
 
GET_PROPERTY HQ_A CHANGING CONTAINER.
  SWC_SET_ELEMENT CONTAINER 'hq_a' 2.
object-private-hq_c =3D 1.
END_PROPERTY.
 
 
 
Work well if I refer to HQ_A first. Then HQ_A =3D 2 and HQ_B =3D 1
Don't work well if I refer to HQ_B first. Then HQ_B =3D 0
 
 
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-----
 
Patrice Nolin, M.Sc.A. (courriel : nolin.patrice at hydro.qc.ca
<mailto:nolin.patrice at hydro.qc.ca> )
Concepteur d=E9veloppement informatique, Projet SIC
T=E9l=E9phone : 0-879-6129
 
 
 
 
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