Simple Kotlin program that:
- reads a list of customers
- Calculates the distance of each customer from a specified set of coordinates using the Haversine formula to calculate the great-circle distance between two points on a sphere.
- output the names and user ids of matching customers (within 100km), sorted by User ID in ascending order.
The application requires:
- Kotlin 1.3
- JUnit
- MockK
- Truth
- Gson
- Konveyor
The easiest way to install and execute the program is to use IntelliJ IDEA 2020.1 / Android Studio 4.1 Canary 8. Click through the menu as follows:
- File -> New -> Import Project
- Run program in IntelliJ IDEA.
- Result output file will be at
/src/main/resources
- Execute tests in IntelliJ as shown in the photo below:
A sample output file can be found at https://github.com/aliumujib/GreatCircleDistance/blob/master/lib/src/main/resources/results_1590975440303.txt
Entry class is located at /src/main/java/com/aliumujib/greatcircledistance/lib/main.kt, it is a simple main.kt class.
Models that can be used for data and result representation are under /src/main/java/com/aliumujib/greatcircledistance/lib/models.
There is a separate class encapsulating distance calculation - /src/main/java/com/aliumujib/greatcircledistance/lib/distances/DistanceCalculator.kt.
The class responsible for writing results to a file - /src/main/java/com/aliumujib/greatcircledistance/lib/sotrage/FileStore.kt.
Tests and test utility files are located inside the test/java/com/aliumujib/greatcircledistance/lib/ directory.