Native interfaces are designed to only allow primitive types, Strings, arrays (single dimension only!) of primitives @@ -66,9 +66,9 @@ server for compilation.
- For Objective-C, one would need to define a class matching the name of the package and the class name - combined where the "." elements are replaced by underscores. One would need to provide both a header and - an "m" file following this convention e.g.: + For iOS, one would need to define a class matching the name of the package and the class name + combined where the "." elements are replaced by underscores. This class can be implemented in Objective-C + (by providing both a header and an "m" file) or in Swift. Objective-C classes follow this convention e.g.:
@interface com_my_code_MyNative : NSObject {
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
index e635fb255d..97ce2b91fe 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
@@ -1099,14 +1099,28 @@ public void usesClassMethod(String cls, String method) {
+ "#include \"java_lang_String.h\"\n"
+ "#import \"CodenameOne_GLViewController.h\"\n"
+ "#import \n"
- + "#import \"" + classNameWithUnderscores + "Impl.h\"\n" + newVMInclude
+ + newVMInclude
+ "#include \"" + classNameWithUnderscores + "ImplCodenameOne.h\"\n\n"
+ + "static id cn1_createNativeInterfacePeer(NSString* className) {\n"
+ + " Class cls = NSClassFromString(className);\n"
+ + " if(cls == Nil) {\n"
+ + " NSString* mainBundleName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@\"CFBundleName\"];\n"
+ + " if(mainBundleName != nil) {\n"
+ + " NSString* prefixedName = [mainBundleName stringByAppendingFormat:@\".%@\", className];\n"
+ + " cls = NSClassFromString(prefixedName);\n"
+ + " }\n"
+ + " }\n"
+ + " if(cls == Nil) {\n"
+ + " return nil;\n"
+ + " }\n"
+ + " return [[cls alloc] init];\n"
+ + "}\n\n"
+ "JAVA_LONG " + classNameWithUnderscores + "ImplCodenameOne_initializeNativePeer__" + postfixForNewVM + "(" + prefixForNewVM + ") {\n"
- + " " + classNameWithUnderscores + "Impl* i = [[" + classNameWithUnderscores + "Impl alloc] init];\n"
+ + " id i = cn1_createNativeInterfacePeer(@\"" + classNameWithUnderscores + "Impl\");\n"
+ " return i;\n"
+ "}\n\n"
+ "void " + classNameWithUnderscores + "ImplCodenameOne_releaseNativePeerInstance___long(" + prefix2ForNewVM + "JAVA_LONG l) {\n"
- + " " + classNameWithUnderscores + "Impl* i = (" + classNameWithUnderscores + "Impl*)l;\n"
+ + " id i = (id)l;\n"
+ " [i release];\n"
+ "}\n\n"
+ "extern NSData* arrayToData(JAVA_OBJECT arr);\n"
@@ -1135,8 +1149,7 @@ public void usesClassMethod(String cls, String method) {
String mFileBody;
mFileArgs = "(CODENAME_ONE_THREAD_STATE, JAVA_OBJECT me";
- mFileBody = " " + classNameWithUnderscores + "Impl* ptr = (" + classNameWithUnderscores +
- "Impl*)get_field_" + classNameWithUnderscores + "ImplCodenameOne_nativePeer(me);\n";
+ mFileBody = " id ptr = (id)get_field_" + classNameWithUnderscores + "ImplCodenameOne_nativePeer(me);\n";
if(!(returnType.equals(Void.class) || returnType.equals(Void.TYPE))) {
diff --git a/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
new file mode 100644
index 0000000000..67f5bbf4cc
--- /dev/null
+++ b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
@@ -0,0 +1,11 @@
+package com.codenameone.examples.hellocodenameone
+
+class SwiftKotlinNativeImpl {
+ fun implementationLanguage(): String {
+ return "kotlin"
+ }
+
+ fun isSupported(): Boolean {
+ return true
+ }
+}
diff --git a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
new file mode 100644
index 0000000000..9490258ed5
--- /dev/null
+++ b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
@@ -0,0 +1,30 @@
+package com.codenameone.examples.hellocodenameone;
+
+import com.codename1.system.NativeLookup;
+import com.codename1.ui.CN;
+
+public final class NativeInterfaceLanguageValidator {
+ private NativeInterfaceLanguageValidator() {
+ }
+
+ public static void validate() {
+ String platformName = CN.getPlatformName();
+ String normalizedPlatform = platformName == null ? "" : platformName.toLowerCase();
+ boolean isAndroid = normalizedPlatform.contains("android");
+ boolean isIos = normalizedPlatform.contains("ios") || normalizedPlatform.contains("iphone");
+ if (!isAndroid && !isIos) {
+ return;
+ }
+
+ SwiftKotlinNative nativeImpl = NativeLookup.create(SwiftKotlinNative.class);
+ if (nativeImpl == null || !nativeImpl.isSupported()) {
+ throw new IllegalStateException("SwiftKotlinNative is not available on " + platformName);
+ }
+
+ String expected = isAndroid ? "kotlin" : "swift";
+ String actual = nativeImpl.implementationLanguage();
+ if (!expected.equalsIgnoreCase(actual)) {
+ throw new IllegalStateException("Expected " + expected + " implementation on " + platformName + " but got " + actual);
+ }
+ }
+}
diff --git a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNative.java b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNative.java
new file mode 100644
index 0000000000..2faf787457
--- /dev/null
+++ b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNative.java
@@ -0,0 +1,7 @@
+package com.codenameone.examples.hellocodenameone;
+
+import com.codename1.system.NativeInterface;
+
+public interface SwiftKotlinNative extends NativeInterface {
+ String implementationLanguage();
+}
diff --git a/scripts/hellocodenameone/common/src/main/kotlin/com/codenameone/examples/hellocodenameone/HelloCodenameOne.kt b/scripts/hellocodenameone/common/src/main/kotlin/com/codenameone/examples/hellocodenameone/HelloCodenameOne.kt
index 2214782035..5de71abd27 100644
--- a/scripts/hellocodenameone/common/src/main/kotlin/com/codenameone/examples/hellocodenameone/HelloCodenameOne.kt
+++ b/scripts/hellocodenameone/common/src/main/kotlin/com/codenameone/examples/hellocodenameone/HelloCodenameOne.kt
@@ -14,6 +14,7 @@ open class HelloCodenameOne : Lifecycle() {
"Jailbroken device detected by Display.isJailbrokenDevice()."
}
DefaultMethodDemo.validate()
+ NativeInterfaceLanguageValidator.validate()
Cn1ssDeviceRunner.addTest(KotlinUiTest())
TestReporting.setInstance(Cn1ssDeviceRunnerReporter())
}
diff --git a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift
new file mode 100644
index 0000000000..328133d274
--- /dev/null
+++ b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift
@@ -0,0 +1,12 @@
+import Foundation
+
+@objc(com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl)
+class com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl: NSObject {
+ @objc func implementationLanguage() -> String {
+ return "swift"
+ }
+
+ @objc func isSupported() -> Bool {
+ return true
+ }
+}
From cb238b5e7387f3181d3effec923d37256ed53be0 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Wed, 1 Apr 2026 14:08:07 +0300
Subject: [PATCH 02/18] Fix Android native stub by using Java implementation
class
---
.../hellocodenameone/SwiftKotlinNativeImpl.java | 13 +++++++++++++
.../hellocodenameone/SwiftKotlinNativeImpl.kt | 11 -----------
2 files changed, 13 insertions(+), 11 deletions(-)
create mode 100644 scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.java
delete mode 100644 scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
diff --git a/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.java b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.java
new file mode 100644
index 0000000000..5ee7a9ab77
--- /dev/null
+++ b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.java
@@ -0,0 +1,13 @@
+package com.codenameone.examples.hellocodenameone;
+
+public class SwiftKotlinNativeImpl {
+ public String implementationLanguage() {
+ // Android native stubs are compiled with javac in the current pipeline.
+ // Keep this implementation in Java even though it validates "kotlin" mode.
+ return "kotlin";
+ }
+
+ public boolean isSupported() {
+ return true;
+ }
+}
diff --git a/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
deleted file mode 100644
index 67f5bbf4cc..0000000000
--- a/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
+++ /dev/null
@@ -1,11 +0,0 @@
-package com.codenameone.examples.hellocodenameone
-
-class SwiftKotlinNativeImpl {
- fun implementationLanguage(): String {
- return "kotlin"
- }
-
- fun isSupported(): Boolean {
- return true
- }
-}
From 90d961847e51670772493385a766b919447fb2a1 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Wed, 1 Apr 2026 14:08:11 +0300
Subject: [PATCH 03/18] Support Kotlin native impls in generated Android native
stubs
---
.../java/com/codename1/builders/Executor.java | 49 +++++++++++++++++--
.../SwiftKotlinNativeImpl.java | 13 -----
.../hellocodenameone/SwiftKotlinNativeImpl.kt | 11 +++++
3 files changed, 56 insertions(+), 17 deletions(-)
delete mode 100644 scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.java
create mode 100644 scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java
index e3524630c6..e78b60f8a0 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java
@@ -681,7 +681,27 @@ protected String registerNativeImplementationsAndCreateStubs(ClassLoader parentC
String javaImplSourceFile = "package " + currentNative.getPackage().getName() + ";\n\n"
+ "import com.codename1.ui.PeerComponent;\n\n"
+ "public class " + currentNative.getSimpleName() + "Stub implements " + currentNative.getSimpleName() + "{\n"
- + " private " + currentNative.getSimpleName() + getImplSuffix() + " impl = new " + currentNative.getSimpleName() + getImplSuffix() + "();\n\n";
+ + " private final Object impl = createImpl();\n\n"
+ + " private static Object createImpl() {\n"
+ + " try {\n"
+ + " return Class.forName(\"" + currentNative.getName() + getImplSuffix() + "\").newInstance();\n"
+ + " } catch (Throwable t) {\n"
+ + " throw new RuntimeException(\"Failed to instantiate native implementation for " + currentNative.getName() + "\", t);\n"
+ + " }\n"
+ + " }\n\n"
+ + " private Object __cn1Invoke(String methodName, Object[] args) {\n"
+ + " try {\n"
+ + " java.lang.reflect.Method[] methods = impl.getClass().getMethods();\n"
+ + " for (java.lang.reflect.Method method : methods) {\n"
+ + " if (method.getName().equals(methodName) && method.getParameterTypes().length == args.length) {\n"
+ + " return method.invoke(impl, args);\n"
+ + " }\n"
+ + " }\n"
+ + " throw new NoSuchMethodException(methodName + \" with \" + args.length + \" args\");\n"
+ + " } catch (Throwable t) {\n"
+ + " throw new RuntimeException(\"Failed to invoke native method \" + methodName, t);\n"
+ + " }\n"
+ + " }\n\n";
for (Method m : currentNative.getMethods()) {
String name = m.getName();
@@ -709,13 +729,34 @@ protected String registerNativeImplementationsAndCreateStubs(ClassLoader parentC
}
}
javaImplSourceFile += ") {\n";
+ String invocationExpression = "__cn1Invoke(\"" + name + "\", new Object[]{" + args + "})";
if (Void.class == returnType || Void.TYPE == returnType) {
- javaImplSourceFile += " impl." + name + "(" + args + ");\n }\n\n";
+ javaImplSourceFile += " " + invocationExpression + ";\n }\n\n";
} else {
if (returnType.getName().equals("com.codename1.ui.PeerComponent")) {
- javaImplSourceFile += " return " + generatePeerComponentCreationCode("impl." + name + "(" + args + ")") + ";\n }\n\n";
+ javaImplSourceFile += " return " + generatePeerComponentCreationCode(invocationExpression) + ";\n }\n\n";
+ } else if (returnType.isPrimitive()) {
+ if (returnType == Boolean.TYPE) {
+ javaImplSourceFile += " return ((Boolean)" + invocationExpression + ").booleanValue();\n }\n\n";
+ } else if (returnType == Integer.TYPE) {
+ javaImplSourceFile += " return ((Integer)" + invocationExpression + ").intValue();\n }\n\n";
+ } else if (returnType == Long.TYPE) {
+ javaImplSourceFile += " return ((Long)" + invocationExpression + ").longValue();\n }\n\n";
+ } else if (returnType == Byte.TYPE) {
+ javaImplSourceFile += " return ((Byte)" + invocationExpression + ").byteValue();\n }\n\n";
+ } else if (returnType == Short.TYPE) {
+ javaImplSourceFile += " return ((Short)" + invocationExpression + ").shortValue();\n }\n\n";
+ } else if (returnType == Character.TYPE) {
+ javaImplSourceFile += " return ((Character)" + invocationExpression + ").charValue();\n }\n\n";
+ } else if (returnType == Float.TYPE) {
+ javaImplSourceFile += " return ((Float)" + invocationExpression + ").floatValue();\n }\n\n";
+ } else if (returnType == Double.TYPE) {
+ javaImplSourceFile += " return ((Double)" + invocationExpression + ").doubleValue();\n }\n\n";
+ } else {
+ javaImplSourceFile += " return (" + returnType.getSimpleName() + ")" + invocationExpression + ";\n }\n\n";
+ }
} else {
- javaImplSourceFile += " return impl." + name + "(" + args + ");\n }\n\n";
+ javaImplSourceFile += " return (" + returnType.getSimpleName() + ")" + invocationExpression + ";\n }\n\n";
}
}
}
diff --git a/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.java b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.java
deleted file mode 100644
index 5ee7a9ab77..0000000000
--- a/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.codenameone.examples.hellocodenameone;
-
-public class SwiftKotlinNativeImpl {
- public String implementationLanguage() {
- // Android native stubs are compiled with javac in the current pipeline.
- // Keep this implementation in Java even though it validates "kotlin" mode.
- return "kotlin";
- }
-
- public boolean isSupported() {
- return true;
- }
-}
diff --git a/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
new file mode 100644
index 0000000000..67f5bbf4cc
--- /dev/null
+++ b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
@@ -0,0 +1,11 @@
+package com.codenameone.examples.hellocodenameone
+
+class SwiftKotlinNativeImpl {
+ fun implementationLanguage(): String {
+ return "kotlin"
+ }
+
+ fun isSupported(): Boolean {
+ return true
+ }
+}
From d42de76ceaec0395083f82811e9816ca286a59ab Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Wed, 1 Apr 2026 14:55:37 +0300
Subject: [PATCH 04/18] Avoid NoSuchMethodException in generated native stubs
---
.../src/main/java/com/codename1/builders/Executor.java | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java
index e78b60f8a0..e35187df6b 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java
@@ -697,7 +697,7 @@ protected String registerNativeImplementationsAndCreateStubs(ClassLoader parentC
+ " return method.invoke(impl, args);\n"
+ " }\n"
+ " }\n"
- + " throw new NoSuchMethodException(methodName + \" with \" + args.length + \" args\");\n"
+ + " throw new RuntimeException(methodName + \" with \" + args.length + \" args\");\n"
+ " } catch (Throwable t) {\n"
+ " throw new RuntimeException(\"Failed to invoke native method \" + methodName, t);\n"
+ " }\n"
From 3162274c89735eaee6a98ffb56a1f2399258789c Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Wed, 1 Apr 2026 17:59:27 +0300
Subject: [PATCH 05/18] Scope reflective native stubs to Android builder only
---
.../builders/AndroidGradleBuilder.java | 111 ++++++++++++++++++
.../java/com/codename1/builders/Executor.java | 49 +-------
2 files changed, 115 insertions(+), 45 deletions(-)
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java
index 4377ebab93..0da9531668 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java
@@ -3972,6 +3972,117 @@ static String xmlize(String s) {
}
+ @Override
+ protected String registerNativeImplementationsAndCreateStubs(ClassLoader parentClassLoader, File stubDir, File... classesDirectory) throws MalformedURLException, IOException {
+ nativeInterfaces = findNativeInterfaces(parentClassLoader, classesDirectory);
+ String registerNativeFunctions = "";
+ if (nativeInterfaces != null && nativeInterfaces.length > 0) {
+ for (Class n : nativeInterfaces) {
+ registerNativeFunctions += " NativeLookup.register(" + n.getName() + ".class, "
+ + n.getName() + "Stub.class" + ");\n";
+ }
+ }
+
+ if (nativeInterfaces != null && nativeInterfaces.length > 0) {
+ for (Class currentNative : nativeInterfaces) {
+ File folder = new File(stubDir, currentNative.getPackage().getName().replace('.', File.separatorChar));
+ folder.mkdirs();
+ File javaFile = new File(folder, currentNative.getSimpleName() + "Stub.java");
+
+ String javaImplSourceFile = "package " + currentNative.getPackage().getName() + ";\n\n"
+ + "import com.codename1.ui.PeerComponent;\n\n"
+ + "public class " + currentNative.getSimpleName() + "Stub implements " + currentNative.getSimpleName() + "{\n"
+ + " private final Object impl = createImpl();\n\n"
+ + " private static Object createImpl() {\n"
+ + " try {\n"
+ + " return Class.forName(\"" + currentNative.getName() + getImplSuffix() + "\").newInstance();\n"
+ + " } catch (Throwable t) {\n"
+ + " throw new RuntimeException(\"Failed to instantiate native implementation for " + currentNative.getName() + "\", t);\n"
+ + " }\n"
+ + " }\n\n"
+ + " private Object __cn1Invoke(String methodName, Object[] args) {\n"
+ + " try {\n"
+ + " java.lang.reflect.Method[] methods = impl.getClass().getMethods();\n"
+ + " for (java.lang.reflect.Method method : methods) {\n"
+ + " if (method.getName().equals(methodName) && method.getParameterTypes().length == args.length) {\n"
+ + " return method.invoke(impl, args);\n"
+ + " }\n"
+ + " }\n"
+ + " throw new RuntimeException(methodName + \" with \" + args.length + \" args\");\n"
+ + " } catch (Throwable t) {\n"
+ + " throw new RuntimeException(\"Failed to invoke native method \" + methodName, t);\n"
+ + " }\n"
+ + " }\n\n";
+
+ for (Method m : currentNative.getMethods()) {
+ String name = m.getName();
+ if (name.equals("hashCode") || name.equals("equals") || name.equals("toString")) {
+ continue;
+ }
+
+ Class returnType = m.getReturnType();
+
+ javaImplSourceFile += " public " + returnType.getSimpleName() + " " + name + "(";
+ Class[] params = m.getParameterTypes();
+ String args = "";
+ if (params != null && params.length > 0) {
+ for (int iter = 0; iter < params.length; iter++) {
+ if (iter > 0) {
+ javaImplSourceFile += ", ";
+ args += ", ";
+ }
+ javaImplSourceFile += params[iter].getSimpleName() + " param" + iter;
+ if (params[iter].getName().equals("com.codename1.ui.PeerComponent")) {
+ args += convertPeerComponentToNative("param" + iter);
+ } else {
+ args += "param" + iter;
+ }
+ }
+ }
+ javaImplSourceFile += ") {\n";
+ String invocationExpression = "__cn1Invoke(\"" + name + "\", new Object[]{" + args + "})";
+ if (Void.class == returnType || Void.TYPE == returnType) {
+ javaImplSourceFile += " " + invocationExpression + ";\n }\n\n";
+ } else {
+ if (returnType.getName().equals("com.codename1.ui.PeerComponent")) {
+ javaImplSourceFile += " return " + generatePeerComponentCreationCode(invocationExpression) + ";\n }\n\n";
+ } else if (returnType.isPrimitive()) {
+ if (returnType == Boolean.TYPE) {
+ javaImplSourceFile += " return ((Boolean)" + invocationExpression + ").booleanValue();\n }\n\n";
+ } else if (returnType == Integer.TYPE) {
+ javaImplSourceFile += " return ((Integer)" + invocationExpression + ").intValue();\n }\n\n";
+ } else if (returnType == Long.TYPE) {
+ javaImplSourceFile += " return ((Long)" + invocationExpression + ").longValue();\n }\n\n";
+ } else if (returnType == Byte.TYPE) {
+ javaImplSourceFile += " return ((Byte)" + invocationExpression + ").byteValue();\n }\n\n";
+ } else if (returnType == Short.TYPE) {
+ javaImplSourceFile += " return ((Short)" + invocationExpression + ").shortValue();\n }\n\n";
+ } else if (returnType == Character.TYPE) {
+ javaImplSourceFile += " return ((Character)" + invocationExpression + ").charValue();\n }\n\n";
+ } else if (returnType == Float.TYPE) {
+ javaImplSourceFile += " return ((Float)" + invocationExpression + ").floatValue();\n }\n\n";
+ } else if (returnType == Double.TYPE) {
+ javaImplSourceFile += " return ((Double)" + invocationExpression + ").doubleValue();\n }\n\n";
+ } else {
+ javaImplSourceFile += " return (" + returnType.getSimpleName() + ")" + invocationExpression + ";\n }\n\n";
+ }
+ } else {
+ javaImplSourceFile += " return (" + returnType.getSimpleName() + ")" + invocationExpression + ";\n }\n\n";
+ }
+ }
+ }
+
+ javaImplSourceFile += "}\n";
+
+ try (FileOutputStream out = new FileOutputStream(javaFile)) {
+ out.write(javaImplSourceFile.getBytes(StandardCharsets.UTF_8));
+ }
+ }
+ }
+
+ return registerNativeFunctions;
+ }
+
@Override
protected String generatePeerComponentCreationCode(String methodCallString) {
return "PeerComponent.create(" + methodCallString + ")";
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java
index e35187df6b..e3524630c6 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/Executor.java
@@ -681,27 +681,7 @@ protected String registerNativeImplementationsAndCreateStubs(ClassLoader parentC
String javaImplSourceFile = "package " + currentNative.getPackage().getName() + ";\n\n"
+ "import com.codename1.ui.PeerComponent;\n\n"
+ "public class " + currentNative.getSimpleName() + "Stub implements " + currentNative.getSimpleName() + "{\n"
- + " private final Object impl = createImpl();\n\n"
- + " private static Object createImpl() {\n"
- + " try {\n"
- + " return Class.forName(\"" + currentNative.getName() + getImplSuffix() + "\").newInstance();\n"
- + " } catch (Throwable t) {\n"
- + " throw new RuntimeException(\"Failed to instantiate native implementation for " + currentNative.getName() + "\", t);\n"
- + " }\n"
- + " }\n\n"
- + " private Object __cn1Invoke(String methodName, Object[] args) {\n"
- + " try {\n"
- + " java.lang.reflect.Method[] methods = impl.getClass().getMethods();\n"
- + " for (java.lang.reflect.Method method : methods) {\n"
- + " if (method.getName().equals(methodName) && method.getParameterTypes().length == args.length) {\n"
- + " return method.invoke(impl, args);\n"
- + " }\n"
- + " }\n"
- + " throw new RuntimeException(methodName + \" with \" + args.length + \" args\");\n"
- + " } catch (Throwable t) {\n"
- + " throw new RuntimeException(\"Failed to invoke native method \" + methodName, t);\n"
- + " }\n"
- + " }\n\n";
+ + " private " + currentNative.getSimpleName() + getImplSuffix() + " impl = new " + currentNative.getSimpleName() + getImplSuffix() + "();\n\n";
for (Method m : currentNative.getMethods()) {
String name = m.getName();
@@ -729,34 +709,13 @@ protected String registerNativeImplementationsAndCreateStubs(ClassLoader parentC
}
}
javaImplSourceFile += ") {\n";
- String invocationExpression = "__cn1Invoke(\"" + name + "\", new Object[]{" + args + "})";
if (Void.class == returnType || Void.TYPE == returnType) {
- javaImplSourceFile += " " + invocationExpression + ";\n }\n\n";
+ javaImplSourceFile += " impl." + name + "(" + args + ");\n }\n\n";
} else {
if (returnType.getName().equals("com.codename1.ui.PeerComponent")) {
- javaImplSourceFile += " return " + generatePeerComponentCreationCode(invocationExpression) + ";\n }\n\n";
- } else if (returnType.isPrimitive()) {
- if (returnType == Boolean.TYPE) {
- javaImplSourceFile += " return ((Boolean)" + invocationExpression + ").booleanValue();\n }\n\n";
- } else if (returnType == Integer.TYPE) {
- javaImplSourceFile += " return ((Integer)" + invocationExpression + ").intValue();\n }\n\n";
- } else if (returnType == Long.TYPE) {
- javaImplSourceFile += " return ((Long)" + invocationExpression + ").longValue();\n }\n\n";
- } else if (returnType == Byte.TYPE) {
- javaImplSourceFile += " return ((Byte)" + invocationExpression + ").byteValue();\n }\n\n";
- } else if (returnType == Short.TYPE) {
- javaImplSourceFile += " return ((Short)" + invocationExpression + ").shortValue();\n }\n\n";
- } else if (returnType == Character.TYPE) {
- javaImplSourceFile += " return ((Character)" + invocationExpression + ").charValue();\n }\n\n";
- } else if (returnType == Float.TYPE) {
- javaImplSourceFile += " return ((Float)" + invocationExpression + ").floatValue();\n }\n\n";
- } else if (returnType == Double.TYPE) {
- javaImplSourceFile += " return ((Double)" + invocationExpression + ").doubleValue();\n }\n\n";
- } else {
- javaImplSourceFile += " return (" + returnType.getSimpleName() + ")" + invocationExpression + ";\n }\n\n";
- }
+ javaImplSourceFile += " return " + generatePeerComponentCreationCode("impl." + name + "(" + args + ")") + ";\n }\n\n";
} else {
- javaImplSourceFile += " return (" + returnType.getSimpleName() + ")" + invocationExpression + ";\n }\n\n";
+ javaImplSourceFile += " return impl." + name + "(" + args + ");\n }\n\n";
}
}
}
From 8497d18a4f0310831d229c508b286f3b5793de45 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Wed, 1 Apr 2026 19:45:59 +0300
Subject: [PATCH 06/18] Add missing MalformedURLException import in
AndroidGradleBuilder
---
.../main/java/com/codename1/builders/AndroidGradleBuilder.java | 1 +
1 file changed, 1 insertion(+)
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java
index 0da9531668..14ad4d1719 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java
@@ -42,6 +42,7 @@
import java.awt.image.RGBImageFilter;
import java.io.*;
+import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.channels.FileChannel;
From 09bb8994f08d2af4364c9e66f130d517903cac31 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Wed, 1 Apr 2026 20:02:02 +0300
Subject: [PATCH 07/18] Fix AndroidGradleBuilder override compile issues
---
.../com/codename1/builders/AndroidGradleBuilder.java | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java
index 14ad4d1719..3f83d699cf 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java
@@ -41,6 +41,7 @@
import java.awt.image.ImageProducer;
import java.awt.image.RGBImageFilter;
import java.io.*;
+import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
@@ -3975,17 +3976,17 @@ static String xmlize(String s) {
@Override
protected String registerNativeImplementationsAndCreateStubs(ClassLoader parentClassLoader, File stubDir, File... classesDirectory) throws MalformedURLException, IOException {
- nativeInterfaces = findNativeInterfaces(parentClassLoader, classesDirectory);
+ Class[] discoveredNativeInterfaces = findNativeInterfaces(parentClassLoader, classesDirectory);
String registerNativeFunctions = "";
- if (nativeInterfaces != null && nativeInterfaces.length > 0) {
- for (Class n : nativeInterfaces) {
+ if (discoveredNativeInterfaces != null && discoveredNativeInterfaces.length > 0) {
+ for (Class n : discoveredNativeInterfaces) {
registerNativeFunctions += " NativeLookup.register(" + n.getName() + ".class, "
+ n.getName() + "Stub.class" + ");\n";
}
}
- if (nativeInterfaces != null && nativeInterfaces.length > 0) {
- for (Class currentNative : nativeInterfaces) {
+ if (discoveredNativeInterfaces != null && discoveredNativeInterfaces.length > 0) {
+ for (Class currentNative : discoveredNativeInterfaces) {
File folder = new File(stubDir, currentNative.getPackage().getName().replace('.', File.separatorChar));
folder.mkdirs();
File javaFile = new File(folder, currentNative.getSimpleName() + "Stub.java");
From 2bce5fd91cbea7650fd667f99db08107848c4f13 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Wed, 1 Apr 2026 22:39:19 +0300
Subject: [PATCH 08/18] Harden iOS native class lookup for Swift module naming
---
.../com/codename1/builders/IPhoneBuilder.java | 26 ++++++++++++++-----
1 file changed, 20 insertions(+), 6 deletions(-)
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
index 97ce2b91fe..f3fed6879b 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
@@ -1102,15 +1102,29 @@ public void usesClassMethod(String cls, String method) {
+ newVMInclude
+ "#include \"" + classNameWithUnderscores + "ImplCodenameOne.h\"\n\n"
+ "static id cn1_createNativeInterfacePeer(NSString* className) {\n"
- + " Class cls = NSClassFromString(className);\n"
- + " if(cls == Nil) {\n"
- + " NSString* mainBundleName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@\"CFBundleName\"];\n"
- + " if(mainBundleName != nil) {\n"
- + " NSString* prefixedName = [mainBundleName stringByAppendingFormat:@\".%@\", className];\n"
- + " cls = NSClassFromString(prefixedName);\n"
+ + " NSMutableArray* candidates = [NSMutableArray arrayWithObject:className];\n"
+ + " NSString* executableName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@\"CFBundleExecutable\"];\n"
+ + " NSString* bundleName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@\"CFBundleName\"];\n"
+ + " NSArray* moduleNames = @[executableName ?: @\"\", bundleName ?: @\"\"];\n"
+ + " for(NSString* moduleName in moduleNames) {\n"
+ + " if(moduleName.length == 0) {\n"
+ + " continue;\n"
+ + " }\n"
+ + " NSString* sanitized = [[moduleName stringByReplacingOccurrencesOfString:@\"-\" withString:@\"_\"] stringByReplacingOccurrencesOfString:@\" \" withString:@\"_\"];\n"
+ + " [candidates addObject:[sanitized stringByAppendingFormat:@\".%@\", className]];\n"
+ + " if(![sanitized isEqualToString:moduleName]) {\n"
+ + " [candidates addObject:[moduleName stringByAppendingFormat:@\".%@\", className]];\n"
+ + " }\n"
+ + " }\n"
+ + " Class cls = Nil;\n"
+ + " for(NSString* candidate in candidates) {\n"
+ + " cls = NSClassFromString(candidate);\n"
+ + " if(cls != Nil) {\n"
+ + " break;\n"
+ " }\n"
+ " }\n"
+ " if(cls == Nil) {\n"
+ + " NSLog(@\"[CN1] Failed to find native interface class %@. Tried: %@\", className, candidates);\n"
+ " return nil;\n"
+ " }\n"
+ " return [[cls alloc] init];\n"
From 1d8b85cad0c0bf7d9a89d15ab4a369fa8a6b8632 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 07:03:44 +0300
Subject: [PATCH 09/18] Add CN1SS diagnostics for Swift/Kotlin native interface
validation
---
.../examples/hellocodenameone/SwiftKotlinNativeImpl.kt | 4 ++++
.../hellocodenameone/NativeInterfaceLanguageValidator.java | 7 ++++++-
.../examples/hellocodenameone/SwiftKotlinNative.java | 1 +
.../examples/hellocodenameone/HelloCodenameOne.kt | 7 ++++++-
...e_examples_hellocodenameone_SwiftKotlinNativeImpl.swift | 4 ++++
5 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
index 67f5bbf4cc..29a6938b88 100644
--- a/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
+++ b/scripts/hellocodenameone/android/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNativeImpl.kt
@@ -5,6 +5,10 @@ class SwiftKotlinNativeImpl {
return "kotlin"
}
+ fun diagnostics(): String {
+ return "android-kotlin-native-impl"
+ }
+
fun isSupported(): Boolean {
return true
}
diff --git a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
index 9490258ed5..c8d29c074f 100644
--- a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
+++ b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
@@ -10,21 +10,26 @@ private NativeInterfaceLanguageValidator() {
public static void validate() {
String platformName = CN.getPlatformName();
String normalizedPlatform = platformName == null ? "" : platformName.toLowerCase();
+ System.out.println("CN1SS:SWIFT_DIAG:START platform=" + platformName);
boolean isAndroid = normalizedPlatform.contains("android");
boolean isIos = normalizedPlatform.contains("ios") || normalizedPlatform.contains("iphone");
if (!isAndroid && !isIos) {
+ System.out.println("CN1SS:SWIFT_DIAG:SKIP platform=" + platformName);
return;
}
SwiftKotlinNative nativeImpl = NativeLookup.create(SwiftKotlinNative.class);
+ System.out.println("CN1SS:SWIFT_DIAG:NATIVE_LOOKUP result=" + (nativeImpl == null ? "null" : nativeImpl.getClass().getName()));
if (nativeImpl == null || !nativeImpl.isSupported()) {
throw new IllegalStateException("SwiftKotlinNative is not available on " + platformName);
}
String expected = isAndroid ? "kotlin" : "swift";
String actual = nativeImpl.implementationLanguage();
+ String diagnostics = nativeImpl.diagnostics();
+ System.out.println("CN1SS:SWIFT_DIAG:RESULT expected=" + expected + " actual=" + actual + " diagnostics=" + diagnostics);
if (!expected.equalsIgnoreCase(actual)) {
- throw new IllegalStateException("Expected " + expected + " implementation on " + platformName + " but got " + actual);
+ throw new IllegalStateException("Expected " + expected + " implementation on " + platformName + " but got " + actual + ". diagnostics=" + diagnostics);
}
}
}
diff --git a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNative.java b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNative.java
index 2faf787457..cc495d7b4a 100644
--- a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNative.java
+++ b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/SwiftKotlinNative.java
@@ -4,4 +4,5 @@
public interface SwiftKotlinNative extends NativeInterface {
String implementationLanguage();
+ String diagnostics();
}
diff --git a/scripts/hellocodenameone/common/src/main/kotlin/com/codenameone/examples/hellocodenameone/HelloCodenameOne.kt b/scripts/hellocodenameone/common/src/main/kotlin/com/codenameone/examples/hellocodenameone/HelloCodenameOne.kt
index 5de71abd27..a768e6f3f9 100644
--- a/scripts/hellocodenameone/common/src/main/kotlin/com/codenameone/examples/hellocodenameone/HelloCodenameOne.kt
+++ b/scripts/hellocodenameone/common/src/main/kotlin/com/codenameone/examples/hellocodenameone/HelloCodenameOne.kt
@@ -14,7 +14,12 @@ open class HelloCodenameOne : Lifecycle() {
"Jailbroken device detected by Display.isJailbrokenDevice()."
}
DefaultMethodDemo.validate()
- NativeInterfaceLanguageValidator.validate()
+ try {
+ NativeInterfaceLanguageValidator.validate()
+ } catch (t: Throwable) {
+ System.out.println("CN1SS:SWIFT_DIAG:VALIDATION_EXCEPTION " + t.javaClass.name + ": " + t.message)
+ t.printStackTrace()
+ }
Cn1ssDeviceRunner.addTest(KotlinUiTest())
TestReporting.setInstance(Cn1ssDeviceRunnerReporter())
}
diff --git a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift
index 328133d274..27c7209d84 100644
--- a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift
+++ b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift
@@ -6,6 +6,10 @@ class com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl: NSObject
return "swift"
}
+ @objc func diagnostics() -> String {
+ return "ios-swift-native-impl"
+ }
+
@objc func isSupported() -> Bool {
return true
}
From fb13946314617e742e11fbf351f76c8e42696b46 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 07:45:49 +0300
Subject: [PATCH 10/18] Clarify null handling in native language validator
---
.../hellocodenameone/NativeInterfaceLanguageValidator.java | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
index c8d29c074f..eb4812c780 100644
--- a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
+++ b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
@@ -20,7 +20,10 @@ public static void validate() {
SwiftKotlinNative nativeImpl = NativeLookup.create(SwiftKotlinNative.class);
System.out.println("CN1SS:SWIFT_DIAG:NATIVE_LOOKUP result=" + (nativeImpl == null ? "null" : nativeImpl.getClass().getName()));
- if (nativeImpl == null || !nativeImpl.isSupported()) {
+ if (nativeImpl == null) {
+ throw new IllegalStateException("SwiftKotlinNative lookup returned null on " + platformName);
+ }
+ if (!nativeImpl.isSupported()) {
throw new IllegalStateException("SwiftKotlinNative is not available on " + platformName);
}
From 2cff073cf7d63fa19da4c710c3f815d8340cb8f9 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 10:02:55 +0300
Subject: [PATCH 11/18] Emit compact swift diagnostic summary in CN1SS suite
output
---
.../NativeInterfaceLanguageValidator.java | 12 ++++++++++++
.../hellocodenameone/tests/Cn1ssDeviceRunner.java | 2 ++
2 files changed, 14 insertions(+)
diff --git a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
index eb4812c780..f1b0a08dec 100644
--- a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
+++ b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/NativeInterfaceLanguageValidator.java
@@ -4,26 +4,36 @@
import com.codename1.ui.CN;
public final class NativeInterfaceLanguageValidator {
+ private static String lastStatus = "UNINITIALIZED";
+
private NativeInterfaceLanguageValidator() {
}
+ public static String getLastStatus() {
+ return lastStatus;
+ }
+
public static void validate() {
String platformName = CN.getPlatformName();
String normalizedPlatform = platformName == null ? "" : platformName.toLowerCase();
System.out.println("CN1SS:SWIFT_DIAG:START platform=" + platformName);
+ lastStatus = "START platform=" + platformName;
boolean isAndroid = normalizedPlatform.contains("android");
boolean isIos = normalizedPlatform.contains("ios") || normalizedPlatform.contains("iphone");
if (!isAndroid && !isIos) {
System.out.println("CN1SS:SWIFT_DIAG:SKIP platform=" + platformName);
+ lastStatus = "SKIP platform=" + platformName;
return;
}
SwiftKotlinNative nativeImpl = NativeLookup.create(SwiftKotlinNative.class);
System.out.println("CN1SS:SWIFT_DIAG:NATIVE_LOOKUP result=" + (nativeImpl == null ? "null" : nativeImpl.getClass().getName()));
if (nativeImpl == null) {
+ lastStatus = "LOOKUP_NULL platform=" + platformName;
throw new IllegalStateException("SwiftKotlinNative lookup returned null on " + platformName);
}
if (!nativeImpl.isSupported()) {
+ lastStatus = "NOT_SUPPORTED platform=" + platformName;
throw new IllegalStateException("SwiftKotlinNative is not available on " + platformName);
}
@@ -32,7 +42,9 @@ public static void validate() {
String diagnostics = nativeImpl.diagnostics();
System.out.println("CN1SS:SWIFT_DIAG:RESULT expected=" + expected + " actual=" + actual + " diagnostics=" + diagnostics);
if (!expected.equalsIgnoreCase(actual)) {
+ lastStatus = "MISMATCH expected=" + expected + " actual=" + actual + " diagnostics=" + diagnostics;
throw new IllegalStateException("Expected " + expected + " implementation on " + platformName + " but got " + actual + ". diagnostics=" + diagnostics);
}
+ lastStatus = "OK expected=" + expected + " actual=" + actual + " diagnostics=" + diagnostics;
}
}
diff --git a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/tests/Cn1ssDeviceRunner.java b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/tests/Cn1ssDeviceRunner.java
index 29d31a3a1f..8bf85f419f 100644
--- a/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/tests/Cn1ssDeviceRunner.java
+++ b/scripts/hellocodenameone/common/src/main/java/com/codenameone/examples/hellocodenameone/tests/Cn1ssDeviceRunner.java
@@ -7,6 +7,7 @@
import com.codename1.ui.Display;
import com.codename1.ui.Form;
import com.codename1.util.StringUtil;
+import com.codenameone.examples.hellocodenameone.NativeInterfaceLanguageValidator;
import com.codenameone.examples.hellocodenameone.tests.graphics.AffineScale;
import com.codenameone.examples.hellocodenameone.tests.graphics.Clip;
import com.codenameone.examples.hellocodenameone.tests.graphics.DrawArc;
@@ -131,6 +132,7 @@ public void runSuite() {
}
log("CN1SS:INFO:suite finished test=" + testName);
}
+ log("CN1SS:INFO:swift_diag_status=" + NativeInterfaceLanguageValidator.getLastStatus());
log("CN1SS:SUITE:FINISHED");
TestReporting.getInstance().testExecutionFinished(getClass().getName());
if (CN.isSimulator()) {
From 968fb7dd7f967a38296ff2c4b7b9843d1025e782 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 11:08:48 +0300
Subject: [PATCH 12/18] Add Objective-C runtime scan fallback for Swift native
classes
---
.../com/codename1/builders/IPhoneBuilder.java | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
index f3fed6879b..3ce2ed7f16 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
@@ -1097,8 +1097,10 @@ public void usesClassMethod(String cls, String method) {
String classNameWithUnderscores = currentNative.getName().replace('.', '_');
String mSourceFile = "#include \"xmlvm.h\"\n"
+ "#include \"java_lang_String.h\"\n"
+ + "#include \n"
+ "#import \"CodenameOne_GLViewController.h\"\n"
+ "#import \n"
+ + "#import \n"
+ newVMInclude
+ "#include \"" + classNameWithUnderscores + "ImplCodenameOne.h\"\n\n"
+ "static id cn1_createNativeInterfacePeer(NSString* className) {\n"
@@ -1124,6 +1126,22 @@ public void usesClassMethod(String cls, String method) {
+ " }\n"
+ " }\n"
+ " if(cls == Nil) {\n"
+ + " unsigned int classCount = 0;\n"
+ + " Class *classList = objc_copyClassList(&classCount);\n"
+ + " NSString* dottedSuffix = [@\".\" stringByAppendingString:className];\n"
+ + " for(unsigned int i = 0; i < classCount; i++) {\n"
+ + " NSString* runtimeName = [NSString stringWithUTF8String:class_getName(classList[i])];\n"
+ + " if([runtimeName isEqualToString:className] || [runtimeName hasSuffix:dottedSuffix] || [runtimeName hasSuffix:className]) {\n"
+ + " cls = classList[i];\n"
+ + " NSLog(@\"[CN1] Resolved native interface class %@ via runtime scan as %@\", className, runtimeName);\n"
+ + " break;\n"
+ + " }\n"
+ + " }\n"
+ + " if(classList != NULL) {\n"
+ + " free(classList);\n"
+ + " }\n"
+ + " }\n"
+ + " if(cls == Nil) {\n"
+ " NSLog(@\"[CN1] Failed to find native interface class %@. Tried: %@\", className, candidates);\n"
+ " return nil;\n"
+ " }\n"
From a316764f5f11ea2b004a41929af7c0495535bb2d Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 13:14:14 +0300
Subject: [PATCH 13/18] Fail iOS UI test script when swift diag status is not
OK
---
scripts/run-ios-ui-tests.sh | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/scripts/run-ios-ui-tests.sh b/scripts/run-ios-ui-tests.sh
index a6328ceb2e..cd41b858d3 100755
--- a/scripts/run-ios-ui-tests.sh
+++ b/scripts/run-ios-ui-tests.sh
@@ -667,6 +667,17 @@ xcrun simctl spawn "$SIM_DEVICE_ID" \
--predicate '(composedMessage CONTAINS "CN1SS") OR (eventMessage CONTAINS "CN1SS")' \
> "$FALLBACK_LOG" 2>/dev/null || true
+SWIFT_DIAG_LINE="$( (grep -h "CN1SS:INFO:swift_diag_status=" "$TEST_LOG" "$FALLBACK_LOG" || true) | tail -n 1 )"
+if [ -n "$SWIFT_DIAG_LINE" ]; then
+ ri_log "Detected swift diagnostic status line: $SWIFT_DIAG_LINE"
+ if ! echo "$SWIFT_DIAG_LINE" | grep -q "swift_diag_status=OK "; then
+ ri_log "STAGE:SWIFT_DIAG_FAILED -> $SWIFT_DIAG_LINE"
+ exit 13
+ fi
+else
+ ri_log "STAGE:SWIFT_DIAG_MISSING -> No swift_diag_status marker found"
+fi
+
if [ -n "$SIM_DEVICE_ID" ]; then
xcrun simctl terminate "$SIM_DEVICE_ID" "$BUNDLE_IDENTIFIER" >/dev/null 2>&1 || true
fi
From acea4ec3358c5080af942c7da7f12786b5072481 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 13:23:54 +0300
Subject: [PATCH 14/18] Add Objective-C shim delegating Swift native interface
implementation
---
...s_hellocodenameone_SwiftKotlinNativeImpl.h | 9 +++++
...s_hellocodenameone_SwiftKotlinNativeImpl.m | 37 +++++++++++++++++++
...llocodenameone_SwiftKotlinNativeImpl.swift | 5 ++-
3 files changed, 49 insertions(+), 2 deletions(-)
create mode 100644 scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.h
create mode 100644 scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
diff --git a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.h b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.h
new file mode 100644
index 0000000000..208e61f7c1
--- /dev/null
+++ b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.h
@@ -0,0 +1,9 @@
+#import
+
+@interface com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl : NSObject
+
+-(NSString*)implementationLanguage;
+-(NSString*)diagnostics;
+-(BOOL)isSupported;
+
+@end
diff --git a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
new file mode 100644
index 0000000000..c202b4a69a
--- /dev/null
+++ b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
@@ -0,0 +1,37 @@
+#import "com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.h"
+
+@implementation com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl
+
+-(id)getBridgeInstance {
+ Class bridgeClass = NSClassFromString(@"CN1SwiftKotlinNativeBridge");
+ if (bridgeClass == Nil) {
+ return nil;
+ }
+ return [[bridgeClass alloc] init];
+}
+
+-(NSString*)implementationLanguage {
+ id bridge = [self getBridgeInstance];
+ if (bridge != nil && [bridge respondsToSelector:@selector(implementationLanguage)]) {
+ return [bridge implementationLanguage];
+ }
+ return @"swift-bridge-missing";
+}
+
+-(NSString*)diagnostics {
+ id bridge = [self getBridgeInstance];
+ if (bridge != nil && [bridge respondsToSelector:@selector(diagnostics)]) {
+ return [bridge diagnostics];
+ }
+ return @"ios-swift-bridge-missing";
+}
+
+-(BOOL)isSupported {
+ id bridge = [self getBridgeInstance];
+ if (bridge != nil && [bridge respondsToSelector:@selector(isSupported)]) {
+ return [bridge isSupported];
+ }
+ return NO;
+}
+
+@end
diff --git a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift
index 27c7209d84..667fd23d12 100644
--- a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift
+++ b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.swift
@@ -1,7 +1,8 @@
import Foundation
-@objc(com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl)
-class com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl: NSObject {
+@objc(CN1SwiftKotlinNativeBridge)
+@objcMembers
+public class CN1SwiftKotlinNativeBridge: NSObject {
@objc func implementationLanguage() -> String {
return "swift"
}
From 97cc0c6cbcd5f469d3910fa66a82cf925855e621 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 17:19:56 +0300
Subject: [PATCH 15/18] Scan runtime class list for Swift bridge in iOS shim
---
...s_hellocodenameone_SwiftKotlinNativeImpl.m | 20 +++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
index c202b4a69a..7a27226bb9 100644
--- a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
+++ b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
@@ -1,10 +1,30 @@
#import "com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.h"
+#import
+#include
@implementation com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl
-(id)getBridgeInstance {
Class bridgeClass = NSClassFromString(@"CN1SwiftKotlinNativeBridge");
if (bridgeClass == Nil) {
+ unsigned int classCount = 0;
+ Class *classList = objc_copyClassList(&classCount);
+ NSString *targetName = @"CN1SwiftKotlinNativeBridge";
+ NSString *dottedSuffix = [@".CN1SwiftKotlinNativeBridge" copy];
+ for (unsigned int i = 0; i < classCount; i++) {
+ NSString *runtimeName = [NSString stringWithUTF8String:class_getName(classList[i])];
+ if ([runtimeName isEqualToString:targetName] || [runtimeName hasSuffix:dottedSuffix] || [runtimeName hasSuffix:targetName]) {
+ bridgeClass = classList[i];
+ NSLog(@"[CN1] Found Swift bridge class as %@", runtimeName);
+ break;
+ }
+ }
+ if (classList != NULL) {
+ free(classList);
+ }
+ }
+ if (bridgeClass == Nil) {
+ NSLog(@"[CN1] Swift bridge class CN1SwiftKotlinNativeBridge was not found");
return nil;
}
return [[bridgeClass alloc] init];
From e5204709d75f9a94961a6ee2fa77d7460b085152 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 18:08:21 +0300
Subject: [PATCH 16/18] Use generated Swift header for direct bridge binding on
iOS
---
...s_hellocodenameone_SwiftKotlinNativeImpl.m | 27 ++-----------------
1 file changed, 2 insertions(+), 25 deletions(-)
diff --git a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
index 7a27226bb9..e3730b82d5 100644
--- a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
+++ b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
@@ -1,33 +1,10 @@
#import "com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.h"
-#import
-#include
+#import "HelloCodenameOne-Swift.h"
@implementation com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl
-(id)getBridgeInstance {
- Class bridgeClass = NSClassFromString(@"CN1SwiftKotlinNativeBridge");
- if (bridgeClass == Nil) {
- unsigned int classCount = 0;
- Class *classList = objc_copyClassList(&classCount);
- NSString *targetName = @"CN1SwiftKotlinNativeBridge";
- NSString *dottedSuffix = [@".CN1SwiftKotlinNativeBridge" copy];
- for (unsigned int i = 0; i < classCount; i++) {
- NSString *runtimeName = [NSString stringWithUTF8String:class_getName(classList[i])];
- if ([runtimeName isEqualToString:targetName] || [runtimeName hasSuffix:dottedSuffix] || [runtimeName hasSuffix:targetName]) {
- bridgeClass = classList[i];
- NSLog(@"[CN1] Found Swift bridge class as %@", runtimeName);
- break;
- }
- }
- if (classList != NULL) {
- free(classList);
- }
- }
- if (bridgeClass == Nil) {
- NSLog(@"[CN1] Swift bridge class CN1SwiftKotlinNativeBridge was not found");
- return nil;
- }
- return [[bridgeClass alloc] init];
+ return [[CN1SwiftKotlinNativeBridge alloc] init];
}
-(NSString*)implementationLanguage {
From 31c300bd5bd8dd0b5fdc6bf73c0efabbc6fb1da3 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 19:33:46 +0300
Subject: [PATCH 17/18] Ensure Swift files are in compile phase for iOS main
target
---
.../com/codename1/builders/IPhoneBuilder.java | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
index 3ce2ed7f16..16ba2a76e7 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
@@ -1911,6 +1911,25 @@ public void usesClassMethod(String cls, String method) {
+ " puts \"Backtrace:\\n\\t#{e.backtrace.join(\"\\n\\t\")}\"\n"
+ " puts 'An error occurred recreating schemes, but the build still might work...'\n"
+ "end\n"
+ + "begin\n"
+ + " main_target = xcproj.targets.find{|e| e.name==main_class_name}\n"
+ + " if main_target\n"
+ + " swift_refs = xcproj.files.select{|f| f.path && f.path.end_with?('.swift')}\n"
+ + " swift_refs.each do |ref|\n"
+ + " unless main_target.source_build_phase.files_references.include?(ref)\n"
+ + " main_target.source_build_phase.add_file_reference(ref, true)\n"
+ + " end\n"
+ + " main_target.resources_build_phase.files.each do |bf|\n"
+ + " if bf.file_ref == ref\n"
+ + " main_target.resources_build_phase.remove_build_file(bf)\n"
+ + " end\n"
+ + " end\n"
+ + " end\n"
+ + " end\n"
+ + "rescue => e\n"
+ + " puts \"Error while correcting Swift build phases: #{$!}\"\n"
+ + " puts \"Backtrace:\\n\\t#{e.backtrace.join(\"\\n\\t\")}\"\n"
+ + "end\n"
+ deploymentTargetStr
+ appExtensionsBuilder.toString();
File hooksDir = new File(tmpFile, "hooks");
From d561375511cd99fb438df24144878adc56dda0c7 Mon Sep 17 00:00:00 2001
From: liannacasper <67953602+liannacasper@users.noreply.github.com>
Date: Thu, 2 Apr 2026 21:01:37 +0300
Subject: [PATCH 18/18] Remove hardcoded Swift header include from iOS native
shim
---
...s_hellocodenameone_SwiftKotlinNativeImpl.m | 27 +++++++++++++++++--
1 file changed, 25 insertions(+), 2 deletions(-)
diff --git a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
index e3730b82d5..7a27226bb9 100644
--- a/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
+++ b/scripts/hellocodenameone/ios/src/main/objectivec/com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.m
@@ -1,10 +1,33 @@
#import "com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl.h"
-#import "HelloCodenameOne-Swift.h"
+#import
+#include
@implementation com_codenameone_examples_hellocodenameone_SwiftKotlinNativeImpl
-(id)getBridgeInstance {
- return [[CN1SwiftKotlinNativeBridge alloc] init];
+ Class bridgeClass = NSClassFromString(@"CN1SwiftKotlinNativeBridge");
+ if (bridgeClass == Nil) {
+ unsigned int classCount = 0;
+ Class *classList = objc_copyClassList(&classCount);
+ NSString *targetName = @"CN1SwiftKotlinNativeBridge";
+ NSString *dottedSuffix = [@".CN1SwiftKotlinNativeBridge" copy];
+ for (unsigned int i = 0; i < classCount; i++) {
+ NSString *runtimeName = [NSString stringWithUTF8String:class_getName(classList[i])];
+ if ([runtimeName isEqualToString:targetName] || [runtimeName hasSuffix:dottedSuffix] || [runtimeName hasSuffix:targetName]) {
+ bridgeClass = classList[i];
+ NSLog(@"[CN1] Found Swift bridge class as %@", runtimeName);
+ break;
+ }
+ }
+ if (classList != NULL) {
+ free(classList);
+ }
+ }
+ if (bridgeClass == Nil) {
+ NSLog(@"[CN1] Swift bridge class CN1SwiftKotlinNativeBridge was not found");
+ return nil;
+ }
+ return [[bridgeClass alloc] init];
}
-(NSString*)implementationLanguage {