Re: ScalarType name already used ?

• To: Alexandre Delarue <adelarue@xxxxxxxxx>
• Subject: Re: ScalarType name already used ?
• From: Curtis Rueden <curtis@xxxxxxxxxxxxx>
• Date: Fri, 11 Feb 2000 13:44:33 -0600

>I'm developing an application that needs to display several times the
>same data model, based on different imput files. This application
>creates a new instance of a class, let's call it VisADViewer, for each
>file. When the second instance of the class is created, the following
>exception is thrown:
>
>Visad.TypeException : ScalarType: name already used
>
>This happens in this section of my code:
>...
>RealType xRT = new RealType("latitude", null, null);
>RealType yRT = new RealType("longitude", null, null);
>RealType zRT = new RealType("temperature", null, null);
>...
>
>I have nothing declared static... in my code. Did anybody ever
>experience something like that ? Any idea to solve the problem ?
>(My first thought is that something may be declared static in the visad
>package...)

Alex,

VisAD does maintain a static Vector of ScalarTypes.  To reuse the same
ScalarType again, use the following code:

RealType xRT = (RealType) ScalarType.getScalarTypeByName("latitude");
if (xRT == null) xRT = new RealType("latitude", null, null);

This code searches the static Vector for an already existing RealType
called latitude.  If it can't find it, it creates it.

-Curtis

• References:
  • ScalarType name already used ?
    • From: Alexandre Delarue