Initializer, property and collection injection: replace instanceof with polymorphism

[jasperblues]

We can clean up this long ugly method by using polymorphism on the TyphoonInitializer base:

//FIXME: replace parameter.type == with polymorphism
- (void)configureInvocation:(NSInvocation*)invocation withFactory:(TyphoonComponentFactory*)factory
{
    NSArray* injectedParameters = [self injectedParameters];
    for (id <TyphoonInjectedParameter> parameter in injectedParameters)
    {
        if (parameter.type == TyphoonParameterInjectionTypeReference)
        {
            TyphoonParameterInjectedByReference* byReference = (TyphoonParameterInjectedByReference*) parameter;
            [[factory stack] peekForKey:byReference.reference]; //Raises circular dependencies exception if already initing.
            id reference = [factory componentForKey:byReference.reference];
            [invocation setArgument:&reference atIndex:parameter.index + 2];
        }
        else if (parameter.type == TyphoonParameterInjectionTypeStringRepresentation)
        {
            TyphoonParameterInjectedWithStringRepresentation* byString = (TyphoonParameterInjectedWithStringRepresentation*) parameter;
            [self setArgumentFor:invocation index:byString.index + 2 textValue:byString.textValue requiredType:[byString resolveType]];
        }
        else if (parameter.type == TyphoonParameterInjectionTypeObjectInstance)
        {
            TyphoonParameterInjectedWithObjectInstance* byInstance = (TyphoonParameterInjectedWithObjectInstance*) parameter;
            id value = byInstance.value;
            BOOL isValuesIsWrapper = [value isKindOfClass:[NSNumber class]] || [value isKindOfClass:[NSValue class]];

            if (isValuesIsWrapper && [byInstance isPrimitiveParameter])
            {
                [self setPrimitiveArgumentForInvocation:invocation index:parameter.index + 2 fromValue:value];
            }
            else
            {
                [invocation setArgument:&value atIndex:parameter.index + 2];
            }
        }
        else if (parameter.type == TyphoonParameterInjectionTypeAsCollection)
        {
            TyphoonParameterInjectedAsCollection* asCollection = (TyphoonParameterInjectedAsCollection*) parameter;

            //FIXME: This shouldn't be a concern of the TyphoonComponentFactory, but of the collection type.
            id collection = [factory buildCollectionWithValues:asCollection.values requiredType:asCollection.collectionType];
            [invocation setArgument:&collection atIndex:parameter.index + 2];
        }
    }
}