KOptional.orThrow

gradle.properties

@@ -4,7 +4,7 @@ kotlin.code.style=official
 specifyKotlinAsDependency=false
 
 projectGroup=ru.dbotthepony.kommons
-projectVersion=2.9.21
+projectVersion=2.9.22
 
 guavaDepVersion=33.0.0
 gsonDepVersion=2.8.9

src/main/kotlin/ru/dbotthepony/kommons/util/KOptional.kt

@@ -26,6 +26,9 @@ class KOptional<T> private constructor(private val _value: T, val isPresent: Boo
 		throw NoSuchElementException("No value is present")
 	}
 
+	inline val isEmpty: Boolean
+		get() = !isPresent
+
 	inline fun ifPresent(block: (T) -> Unit): KOptional<T> {
 		if (isPresent) {
 			block.invoke(value)
@@ -75,6 +78,14 @@ class KOptional<T> private constructor(private val _value: T, val isPresent: Boo
 		}
 	}
 
+	inline fun orThrow(supplier: () -> Throwable): T {
+		if (isPresent) {
+			return this.value
+		} else {
+			throw supplier.invoke()
+		}
+	}
+
 	infix fun or(value: KOptional<T>): KOptional<T> {
 		if (isPresent) {
 			return this