XURL is a utility that can be used to generate and retrieve short URLs when we don’t want to use the original longer URLs.
- Create a concrete class which implements a short URL interface class provided. It contains all the methods that can be used to create long URL to short URL mappings.
- Implement a method to take a long URL as input, generate a random 9 character short URL and return it. Also maintain this mapping using a hash map for quick retrieval.
- Implement a method to take a long URL and a custom short URL as input and register that mapping.
- Error handling to make sure each long URL maps to only one short URL and vice versa.
- Implement a method to lookup short URL for a given long URL, from the mapping created.
- Implement a method to delete the mapping based on a long URL.
- Implement a counter to keep track of the hit count for each long URL - which tells us how many times a particular long URL has been looked up.
- Test these methods using test cases.