InventorySample.java

InventorySample.java

public static void main(String args[]){
	//bike product
	Map<String,List<String>> productDetails = new HashMap<>();
	List<String> bikeComponentNames = new ArrayList<>();
	bikeComponentNames.add("wheel");
	bikeComponentNames.add("wheel");
	bikeComponentNames.add("frame");
	productDetails.put("bike", bikeComponentNames);

	//componets
	Map<String,Component> components = new HashMap<>();
	components.put("wheel", new BikeComponent("mrf#123"));
	components.put("frame", new BikeComponent("cf#52"));

	//component prices
	Map<String,Double> prices = new HashMap<>();
	prices.put("mrf#123", 100D);
	prices.put("cf#52", 1000D);
	Double discount = 0.10;

	Either<Exception, Double> ep = new InventorySample(productDetails, components, prices, discount).getProductPrice("bike");
	ep.match((Exception e) -> {System.out.println(e.getMessage()); return null;}, 
		(Double price) -> {System.out.println(price); return null;});

}

/*
Output with various changes to code above:
---------------
(No change)

-> 1080.0
---------------
//remove price of "cf#52" from inventory
Map<String,Double> prices = new HashMap<>();
	prices.put("mrf#123", 100D);
//	prices.put("cf#52", 1000D);

-> Price not found for cf#52
-----------------
//remove frame componenet from inventory
Map<String,Component> components = new HashMap<>();
components.put("wheel", new BikeComponent("mrf#123"));
//	components.put("frame", new BikeComponent("cf#52"));

-> Component not found: frame
-----------------
//no discount
Either<Exception, Double> ep = new InventorySample(productDetails, components, prices, null).getProductPrice("bike");

-> 1200.00
------------------

*/