Design and coding exercise in java
A TV broadcaster has decided to roll out 3D TV by geographic area. A software engineering team, developing the online store, is working on the story below.
A “3D addon” is an enhancement to a customers existing Entertainment Pack. E.g. SPORTS_3D_ADD_ON enhances the SPORTS product.
The broadcaster has partnered with a third party that provides a service that checks the 3D TV availability for a given postcode.
- Basket.java
- ThreeDeeAddOnService.java
- AvailabilityChecker.java
- TechnicalFailureException.java
You are required to provide an implementation of the ThreeDeeAddOnService interface, a simple service containing a single method.
Basket and ThreeDeeAddOnService may be changed as you see fit.
The AvailabilityChecker and TechnicalFailureException cannot be modified.
The product codes for the entertainment packs are:
- SPORTS
- KIDS
- VARIETY
- NEWS
- MOVIES_1
- MOVIES_2
The product codes for the addon’s are:
- SPORTS_3D_ADD_ON
- NEWS_3D_ADD_ON
- MOVIES_3D_ADD_ON
The third party service returns the following values:
- SERVICE_AVAILABLE - 3DTV service is available for the given post code
- SERVICE_UNAVAILABLE - 3DTV service is unavailable for the given post code
- SERVICE_PLANNED - 3DTV service is not available right now, but it should be available within the next 3 months
- POSTCODE_INVALID - The supplied postcode is invalid
If the service is unavailable then a TechnicalFailureException is thrown.
| Postcode | Basket | Expected Output |
|---|---|---|
| Currently in a 3D area | 3D compatible products in the basket | Return relevant 3D addons |
| N/A | No products with 3D addons | Return no 3D addons |
| Currently, not in a 3D area, or technical failure occurs | 3D compatible products in the basket | Return no 3D addons |
| Invalid postcode | 3D compatible products in the basket | Return no 3D addons and notify the client that the postcode was invalid |