ItemGroupPricingStrategy.m

//
//  ItemGroupPricingStrategy.m
//  AvocadoTest1
//
//  Created by Christophe Biocca on 12-02-07.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//

#import "ItemGroupPricingStrategy.h"

#import "ItemGroupMultiplicativePricing.h"
#import "ItemGroupDiscountPricing.h"
#import "ItemGroupAbsolutePricing.h"
#import "ItemGroupTrivialPricing.h"

@implementation ItemGroupPricingStrategy

//See [self initialize]
static NSDictionary* itemGroupClassDictionary = nil;

+(void)initialize{
    if(!itemGroupClassDictionary){
        itemGroupClassDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
                                    [ItemGroupTrivialPricing class], @"Trivial",
                                    [ItemGroupAbsolutePricing class], @"Absolute",
                                    [ItemGroupDiscountPricing class], @"Discount",
                                    [ItemGroupMultiplicativePricing class], @"Multiplicative",
                                    nil];
    }
}

+(id<ItemGroupPricingStrategy>)pricingStrategyFromData:(NSDictionary*)data{
    id<ItemGroupPricingStrategy> returnStrategy = [(id<ItemGroupPricingStrategy>)[[itemGroupClassDictionary 
                                            objectForKey:[data objectForKey:@"name"]] alloc] 
            initWithData:data];
    
    if (!returnStrategy)
        CLLog(LOG_LEVEL_ERROR, [NSString stringWithFormat: @"A strategy tried to load with name: %@. That name doesn't exist in the class dictionary.",[data objectForKey:@"name"]]);
    
    return returnStrategy;
}

@end