Re: null scalary type in ScalarMap

• To: "Kam, Michelle C" <michelle.c.kam@xxxxxxxx>
• Subject: Re: null scalary type in ScalarMap
• From: Curtis Rueden <curtis@xxxxxxxxxxxxx>
• Date: Thu, 17 Jul 2003 16:40:22 -0500

Hi Michelle,

Intuitively, a ScalarMap with null ScalarType or null DisplayRealType
would serve no purpose when added to a display.  I see no reason to create
such ScalarMaps.  What are you trying to accomplish?

-Curtis

At 03:50 PM 7/17/2003, you wrote:
>Hello,
>
>I am trying to construct a ScalarMap with a null value as one or both of the 
>parameters passed in to ScalarMap(ScalarType scalar, DisplayRealType 
>display_scalar). I tried commenting out the following code in the ScalarMap 
>constructor:
>
>   /*
>    if (scalar == null && needNonNullScalar) {
>      throw new DisplayException("ScalarMap: scalar is null");
>    }
>    if (display_scalar == null) {
>      throw new DisplayException("ScalarMap: display_scalar is null");
>    }
>*/
>
>However, I will get a null pointer later in that constructor if "scalar" or 
>"display_scalar" are passed in as null. Is there a way to wrap a null value 
>for "display_scalar" or "scalar" before it is passed in to create a ScalarMap? 
>
>Thanks,
>Michelle
>
>Michelle Kam           (408) 742-2881
>Lockheed Martin Space Systems Co. SSM/ATC/MSIS
>B/153 O/L922 
>1111 Lockheed Martin Way, Sunnyvale, CA 94089

• References:
  • null scalary type in ScalarMap
    • From: Kam, Michelle C