Java2Swift: fullJavaClassName needs to be "open class" in class-generation mode

Author: DougGregor

Sources/JavaKitMacros/JavaClassMacro.swift

@@ -91,9 +91,10 @@ extension JavaClassMacro: MemberMacro {
       fullJavaClassNameMemberModifiers = "class"
     }
 
+    let classNameAccessSpecifier = isSwiftClass ? "open" : "public"
     members.append("""
       /// The full Java class name for this Swift type.
-      public \(raw: fullJavaClassNameMemberModifiers) var fullJavaClassName: String { \(literal: className) }
+      \(raw: classNameAccessSpecifier) \(raw: fullJavaClassNameMemberModifiers) var fullJavaClassName: String { \(literal: className) }
       """
     )
 

Tests/JavaKitMacroTests/JavaClassMacroTests.swift

@@ -186,7 +186,7 @@ class JavaKitMacroTests: XCTestCase {
           }
 
             /// The full Java class name for this Swift type.
-            public override class var fullJavaClassName: String {
+            open override class var fullJavaClassName: String {
                 "org.swift.example.HelloWorld"
             }
 
@@ -227,7 +227,7 @@ class JavaKitMacroTests: XCTestCase {
           }
 
             /// The full Java class name for this Swift type.
-            public class var fullJavaClassName: String {
+            open class var fullJavaClassName: String {
                 "java.lang.Object"
             }