StreamCodec.Pair

gradle.properties

@@ -4,7 +4,7 @@ kotlin.code.style=official
 specifyKotlinAsDependency=false
 
 projectGroup=ru.dbotthepony.kommons
-projectVersion=2.10.1
+projectVersion=2.10.2
 
 guavaDepVersion=33.0.0
 gsonDepVersion=2.8.9

src/main/kotlin/ru/dbotthepony/kommons/io/StreamCodec.kt

@@ -213,6 +213,30 @@ interface StreamCodec<V> {
 			return copy.invoke(value)
 		}
 	}
+
+	class Pair<L, R>(private val left: StreamCodec<L>, private val right: StreamCodec<R>) : StreamCodec<kotlin.Pair<L, R>> {
+		override fun read(stream: DataInputStream): kotlin.Pair<L, R> {
+			val left = left.read(stream)
+			val right = right.read(stream)
+			return left to right
+		}
+
+		override fun write(stream: DataOutputStream, value: kotlin.Pair<L, R>) {
+			left.write(stream, value.first)
+			right.write(stream, value.second)
+		}
+
+		override fun copy(value: kotlin.Pair<L, R>): kotlin.Pair<L, R> {
+			val left = left.copy(value.first)
+			val right = right.copy(value.second)
+
+			if (left !== this.left && right !== this.right) {
+				return left to right
+			} else {
+				return value
+			}
+		}
+	}
 }
 
 fun <T, R> StreamCodec<T>.map(from: T.() -> R, to: R.() -> T): StreamCodec<R> {