BAEL-1758: Working with Enums in Kotlin (#4413)

core-kotlin/src/main/kotlin/com/baeldung/enums/CardType.kt

@@ -0,0 +1,33 @@
+package com.baeldung.enums
+
+enum class CardType(val color: String) : ICardLimit {
+    SILVER("gray") {
+        override fun getCreditLimit(): Int {
+            return 100000
+        }
+
+        override fun calculateCashbackPercent(): Float {
+            return 0.25f
+        }
+    },
+    GOLD("yellow") {
+        override fun getCreditLimit(): Int {
+            return 200000
+        }
+
+        override fun calculateCashbackPercent(): Float {
+            return 0.5f
+        }
+    },
+    PLATINUM("black") {
+        override fun getCreditLimit(): Int {
+            return 300000
+        }
+
+        override fun calculateCashbackPercent(): Float {
+            return 0.75f
+        }
+    };
+
+    abstract fun calculateCashbackPercent(): Float
+}

core-kotlin/src/main/kotlin/com/baeldung/enums/CardTypeHelper.kt

@@ -0,0 +1,16 @@
+package com.baeldung.enums
+
+class CardTypeHelper {
+    fun getCardTypeByColor(color: String): CardType? {
+        for (cardType in CardType.values()) {
+            if (cardType.color.equals(color)) {
+                return cardType;
+            }
+        }
+        return null
+    }
+
+    fun getCardTypeByName(name: String): CardType {
+        return CardType.valueOf(name.toUpperCase())
+    }
+}

core-kotlin/src/main/kotlin/com/baeldung/enums/ICardLimit.kt

@@ -0,0 +1,5 @@
+package com.baeldung.enums
+
+interface ICardLimit {
+    fun getCreditLimit(): Int
+}