void Start( )
{
// create calculation objects that get chained to each other in a sec
Chain calc1 = new AddNumbers();
Chain calc2 = new SubstractNumbers();
Chain calc3 = new DivideNumbers();
Chain calc4 = new MultiplyNumbers();
// now chain them to each other
calc1.SetNextChain(calc2);
calc2.SetNextChain(calc3);
calc3.SetNextChain(calc4);
// this is the request that will be passed to a chain object to let them figure out which calculation objects it the right for the request
// the request is here the CalculationType enum we add. so we want this pair of numbers to be added
Numbers myNumbers = new Numbers(3, 5, CalculationType.Add);
calc1.Calculate(myNumbers);
// another example:
Numbers myOtherNumbers = new Numbers(6, 2, CalculationType.Multiply);
calc1.Calculate(myOtherNumbers);
// or pass it to some chain object inbetween which will not work in this case:
Numbers myLastNumbers = new Numbers(12, 3, CalculationType.Substract);
calc3.Calculate(myLastNumbers);
}
public void Init()
{
IChain addNumbers = new AddNumbers();
IChain substractNumbers = new SubstractNumbers();
IChain multypileNumbers = new MultypileNumbers();
IChain divideNumbers = new DivideNumbers();
addNumbers.SetNextChain(divideNumbers);
divideNumbers.SetNextChain(multypileNumbers);
multypileNumbers.SetNextChain(substractNumbers);
_chain = addNumbers;
}
