public static Marine CreateMarine(MarineSpecies species)
{
//type not known at this time
Marine animalObj = null;
try
{
//type determined by late binding
switch (species)
{
case MarineSpecies.Shark:
animalObj = new Shark(); //late binding
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
case MarineSpecies.Turtle:
animalObj = new Turtle(); //late binding
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);
}
finally
{
//set the category
animalObj.Category = CategoryType.Marine;
}
return(animalObj);
}
//instance variables
public static Insect CreateInsect(InsectSpecies species)
{
//type not known at this time
Insect animalObj = null;
try
{
//type determined by late binding - species is an enumeration
switch (species)
{
case InsectSpecies.Bee:
//ID, nickName, age, category, gender
animalObj = new Bee(); //late binding
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
//continue with the rest
case InsectSpecies.Butterfly:
animalObj = new Butterfly(); //late binding
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);
}
finally
{
//Set the category
animalObj.Category = CategoryType.Insect;
}
return(animalObj);
}
public static Reptile CreateReptile(ReptileSpecies species)
{
// Object type not known at this time
Reptile animalObj = null;
try
{
switch (species)
{
case ReptileSpecies.Boa:
animalObj = new Boa(); //late binding
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
case ReptileSpecies.Chamaleon:
animalObj = new Chamaleon(); //late binding
if (animalObj == null)
{
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
break;
}
}
//custom exception
catch (Exception e)
{
e.Message.ToString();
NonExistentAnimalTypeException ex = new NonExistentAnimalTypeException();
throw (ex);
}
finally
{
animalObj.Category = CategoryType.Reptile;
}
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);
}