GetTexture() Error

Is there a way to find out if a material has a texture (or other property) by name without getting a runtime error?

I am trying to get a "_BumpMap" texture if one exists and avoid an error if one doesn't exist. However, calling GetTexture("_BumpMap") gives me a runtime error if it doesn't exist.

It's interesting that in the documentation page for Material.GetTexture (<http://unity3d.com/Documentation/ScriptReference/Material.GetTexture.html>), they give the following sample code:

Code (csharp):

1. function Start ()
2. {
3. var tex = renderer.material.GetTexture("_BumpMap");
4. if (tex)
5. print ("My bumpmap is " + tex.name);
6. else
7. print ("I have no bumpmap!");
8. }

Which does work and prints "I have no bumpmap!", but also gives a "Material doesn't have a texture property '_BumpMap' UnityEngine.Material:GetTexture(String)" on the GetTexture() line.

From the nature of the problem, I could assume that the Shader class would have a isTextureSupported() function or something like that.

Note that this is only a problem when the Shader doesn't have the "_BumpMap" property, not when the shader has the capability, but the bumpmap is none in the editor.

 

So if my component throws this error, will I still be able to put this on unity store? Because I recall reading that the components we provide should not throw any exceptions under any condition.(so errors like these are ok right?)