SwiftKit: prepare Unsigned Java types for interop with UInt etc

Author: ktoso

.github/workflows/pull_request.yml

@@ -31,10 +31,12 @@ jobs:
       - uses: actions/checkout@v4
       - name: Prepare CI Environment
         uses: ./.github/actions/prepare_env
+
       - name: Gradle :SwiftKitCore:build
         run: ./gradlew :SwiftKitCore:build -x test
       - name: Gradle :SwiftKitCore:check
         run: ./gradlew :SwiftKitCore:check --info
+        
       - name: Gradle :SwiftKitFFM:build
         run: ./gradlew :SwiftKitFFM:build -x test
       - name: Gradle :SwiftKitFFM:check

SwiftKitCore/build.gradle

@@ -14,6 +14,7 @@
 
 plugins {
     id("build-logic.java-application-conventions")
+    id("me.champeau.jmh") version "0.7.2"
 }
 
 group = "org.swift.swiftkit"
@@ -25,7 +26,7 @@ repositories {
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(19))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
     // Support Android 6+ (Java 7)
     sourceCompatibility = JavaVersion.VERSION_17

SwiftKitCore/src/main/java/org/swift/swiftkit/core/NotImplementedException.java

@@ -0,0 +1,10 @@
+package org.swift.swiftkit.core;
+
+public class NotImplementedException extends RuntimeException {
+
+    private static final long serialVersionUID = 1L;
+
+    public NotImplementedException(String message) {
+        super(message);
+    }
+}