How can I get the txt information by line and split each line for separate classes

Question

I have a text file with three lines of code and need to take each line and split it by "," so I can take the pieces from each line and place them into a class. I'll have one class for each line.

This is what I have come up with sofar. I just think it's too much code and would like to find a simple way to do this.

The text file looks like this

character, stats, stats, stats
weapon, stats
armor, stats

my code for the first line looks like this

class CharacterFight(
       var name : String,
       var race : String,
       var hitpoints :Int,
       var strength : Int,
       var agility : Int,

){
override fun toString(): String {
       return """Character
           Name: ${name}
           Race: ${race}
           Hitpoints :${hitpoints}
           Strength: ${strength}
           Agility: ${agility}
       """.trimMargin()
   }
}
var charactersStats = mutableListOf<CharacterFight>()
var charStats = mutableListOf<String>()
   val fileName: String = "src/main/kotlin/gimli.txt"
   var  characterInfo = mutableListOf<String>()
var lines = File(fileName).readLines()
   for (line in lines){
       val pieces  = line.split("\n")
       characterInfo.add(line)
   }
    charStats.add(characterInfo[0])
   for (stat in charStats){
       var statpieces = stat.split(",")
      var charpieces = CharacterFight(statpieces[0],statpieces[1],statpieces[2].toInt(),statpieces[3].toInt(),statpieces[4].toInt)
       charactersStats.add(charpieces)
   }```

Answer 1

To avoid boilerplate toString() code consider using data classes:

data class CharacterFight(var name: String, var race: String, var hitpoints: Int, var strength: Int, var agility: Int)

Assuming that other two classes are

data class Weapon(val name: String, val value: Int)
data class Armor(val name: String, val value: Int)

CSV deserializing could be done in the following manner (usage of destructuring declarations makes code more readable, but explicit toInt() convertion on a certain passing arguments still can't be avoided):

fun deserializeCSV(fileName: String): Triple<CharacterFight, Weapon, Armor> {
    val (characterInfo, weaponInfo, armorInfo) = File(fileName).readLines().map { it.split(",") }
    val character = run { //create separate scope to avoid clash of name variables
        val (name, race, hitpointsStr, strengthStr, agilityStr) = characterInfo
        CharacterFight(name, race, hitpointsStr.toInt(), strengthStr.toInt(), agilityStr.toInt())
    }
    val weapon = run { //create separate scope to avoid clash of name variables
        val (name, valueStr) = weaponInfo
        Weapon(name, valueStr.toInt())
    }
    val armor = run { //create separate scope to avoid clash of name variables
        val (name, valueStr) = armorInfo
        Armor(name, valueStr.toInt())
    }
    return Triple(character, weapon, armor)
}

If provided CSV format is not a hard requirment, I would recomend to use JSON instead:

{"name":"Gimli","race":"dwarf","hitpoints":90,"strength":40,"agility":3}
{"name":"Axe","value":25}
{"name":"Plate male","value":85}

Then with help of kotlinx.serialization library deserialization is fairly easy:

//don't forget to add `@Serializable` annotation to all deserializable classes

fun deserializeJSON(fileName: String): Triple<CharacterFight, Weapon, Armor> {
    val (characterInfo, weaponInfo, armorInfo) = File(fileName).readLines()
    val character: CharacterFight = Json.decodeFromString(characterInfo)
    val weapon: Weapon = Json.decodeFromString(weaponInfo)
    val armor: Armor = Json.decodeFromString(armorInfo)
    return Triple(character, weapon, armor)
}