public Knapsack SolveProblemUsing(
KnapsackAlgorithmType algorithmType,
List <Supply> possibleSupplies,
int maxWeight)
{
// loop thru all registered implementations
foreach (Type impl in RegisteredImplementations)
{
// get attributes for this type
object[] attrlist = impl.GetCustomAttributes(true);
// loop thru all attributes for this class
foreach (object attr in attrlist)
{
if (attr is KnapsackAlgorithmAttribute)
{
if (((KnapsackAlgorithmAttribute)attr).TypeOfAlgorithm.Equals(algorithmType))
{
IKnapsackAlgorithm knapsackAlgorithm = (KnapsackAlgorithmBase)Activator.CreateInstance(impl);
return(knapsackAlgorithm.Execute(possibleSupplies, maxWeight));
}
}
}
}
throw new Exception("Could not find a KnapsackAlgorithmBase implementation for this AlgorithmType");
}
//private void SimpleCase2(IKnapsackAlgorithm algorithm) =>
// TestCase(algorithm, new int[] { 3, 6, 2, 4, 1, 10, 2, 7, 8, 2, 4, 9 }, new int[] { 1, 3, 5, 7, 9, 11 });
private void TestCase(IKnapsackAlgorithm algorithm, Thing[] input, int maxSize, int[] expected)
{
var resIndexes = algorithm.Get(input, maxSize).ToArray();
var resThings = resIndexes.Select(x => input[x]).ToArray();
AssertCaseConstraint(resThings, maxSize);
AssertAnswer(expected, resIndexes);
}
private void SimpleCase1(IKnapsackAlgorithm algorithm) =>
TestCase(algorithm, new Thing[] {
new Thing {
Value = 3, Size = 4
},
new Thing {
Value = 2, Size = 3
},
new Thing {
Value = 4, Size = 2
},
new Thing {
Value = 4, Size = 3
}
}, 6, new int[] { 2, 3 });
private void TestAlgorithm(IKnapsackAlgorithm algorithm)
{
SimpleCase1(algorithm);
//SimpleCase2(algorithm);
}