public static Bird CreateBird(BirdSpecies Species)
{
Bird animalObj = null;//Birdtype unknown at this time.
//Lets determine users choice of animal.
switch (Species)
{
case BirdSpecies.Crow:
animalObj = new Crow();
break;
case BirdSpecies.Eagle:
animalObj = new Eagle();
break;
case BirdSpecies.Penguin:
animalObj = new Penguin();
break;
default:
Debug.Assert(false, "Not implemented");
break;
}
//Set animal category
animalObj.Category = CategoryType.Bird;
return animalObj;//Return created instance of object.
}
public static Bird CreateBird(BirdSpecies species)
{
//type not known at this time
Bird animalObj = null;
try
{
//type determined by late binding
switch (species)
{
case BirdSpecies.Eagle:
animalObj = new Eagle();//late binding
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
case BirdSpecies.Falcon:
animalObj = new Falcon();//late binding
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
case BirdSpecies.Duck:
animalObj = null;
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
default:
Debug.Assert(false, "to be completed");
break;
}
}
//custom exception
catch (Exception e)
{
e.Message.ToString();
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
//set the category
animalObj.Category = CategoryType.Bird;
return animalObj;
}
public static Bird CreateBird(BirdSpecies species)
{
//type not known at this time
Bird animalObj = null;
try
{
//type determined by late binding
switch (species)
{
case BirdSpecies.Eagle:
animalObj = new Eagle(); //late binding
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
case BirdSpecies.Falcon:
animalObj = new Falcon(); //late binding
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
case BirdSpecies.Duck:
animalObj = null;
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
default:
Debug.Assert(false, "to be completed");
break;
}
}
//custom exception
catch (Exception e)
{
e.Message.ToString();
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
//set the category
animalObj.Category = CategoryType.Bird;
return(animalObj);
}
