jextract/jni: Add code generation support for URL type

Samples/SwiftJavaExtractJNISampleApp/Sources/MySwiftLibrary/Date.swift → Samples/SwiftJavaExtractJNISampleApp/Sources/MySwiftLibrary/FoundationTypes.swift

@@ -2,7 +2,7 @@
 //
 // This source file is part of the Swift.org open source project
 //
-// Copyright (c) 2025 Apple Inc. and the Swift.org project authors
+// Copyright (c) 2026 Apple Inc. and the Swift.org project authors
 // Licensed under Apache License v2.0
 //
 // See LICENSE.txt for license information
@@ -27,3 +27,15 @@ public func compareDates(date1: Date, date2: Date) -> Bool {
 public func dateFromSeconds(_ seconds: Double) -> Date {
   Date(timeIntervalSince1970: seconds)
 }
+
+public func echoUUID(_ uuid: UUID) -> UUID {
+  uuid
+}
+
+public func makeUUID() -> UUID {
+  UUID()
+}
+
+public func echoURL(_ url: URL) -> URL {
+  url
+}

Samples/SwiftJavaExtractJNISampleApp/src/test/java/com/example/swift/DateTest.java → Samples/SwiftJavaExtractJNISampleApp/src/test/java/com/example/swift/FoundationTypeTest.java

@@ -2,7 +2,7 @@
 //
 // This source file is part of the Swift.org open source project
 //
-// Copyright (c) 2025 Apple Inc. and the Swift.org project authors
+// Copyright (c) 2026 Apple Inc. and the Swift.org project authors
 // Licensed under Apache License v2.0
 //
 // See LICENSE.txt for license information
@@ -19,10 +19,11 @@
 
 import java.time.Instant;
 import java.time.temporal.ChronoUnit;
+import java.util.UUID;
 
 import static org.junit.jupiter.api.Assertions.*;
 
-public class DateTest {
+public class FoundationTypeTest {
     @Test
     void date_functions() {
         try (var arena = SwiftArena.ofConfined()) {
@@ -59,4 +60,27 @@ void date_timeIntervalSince1970() {
             assertEquals(1000, date.getTimeIntervalSince1970());
         }
     }
-}
+
+    @Test
+    void echoUUID() {
+        var uuid = UUID.randomUUID();
+        assertEquals(uuid, MySwiftLibrary.echoUUID(uuid));
+    }
+
+    @Test
+    void makeUUID() {
+        var uuid = MySwiftLibrary.makeUUID();
+        assertEquals(4, uuid.version());
+    }
+
+    @Test
+    void echoURL() {
+        try (var arena = SwiftArena.ofConfined()) {
+            var url = URL.init("http://example.com", arena);
+            assertDoesNotThrow(() -> {
+                var unwrapped = url.orElseThrow();
+                assertEquals("http://example.com", unwrapped.getAbsoluteString());
+            });
+        }
+    }
+}

Sources/JExtractSwiftLib/JNI/JNIJavaTypeTranslator.swift

@@ -53,7 +53,8 @@ enum JNIJavaTypeTranslator {
       .dictionary,
       .set,
       .foundationDate, .essentialsDate,
-      .foundationUUID, .essentialsUUID:
+      .foundationUUID, .essentialsUUID,
+      .foundationURL, .essentialsURL:
       return nil
     }
   }
@@ -79,7 +80,8 @@ enum JNIJavaTypeTranslator {
       .dictionary,
       .set,
       .foundationDate, .essentialsDate,
-      .foundationUUID, .essentialsUUID:
+      .foundationUUID, .essentialsUUID,
+      .foundationURL, .essentialsURL:
       nil
     }
   }
@@ -105,7 +107,8 @@ enum JNIJavaTypeTranslator {
       .dictionary,
       .set,
       .foundationDate, .essentialsDate,
-      .foundationUUID, .essentialsUUID:
+      .foundationUUID, .essentialsUUID,
+      .foundationURL, .essentialsURL:
       nil
     }
   }

Sources/JExtractSwiftLib/JNI/JNISwift2JavaGenerator+JavaTranslation.swift

@@ -438,10 +438,7 @@ extension JNISwift2JavaGenerator {
               genericRequirements: genericRequirements,
             )
 
-          case .foundationDate, .essentialsDate:
-            break // Handled as wrapped struct
-
-          case .foundationData, .essentialsData:
+          case .foundationDate, .essentialsDate, .foundationData, .essentialsData, .foundationURL, .essentialsURL:
             break // Handled as wrapped struct
 
           case .unsafeRawBufferPointer, .unsafeMutableRawBufferPointer:
@@ -877,11 +874,7 @@ extension JNISwift2JavaGenerator {
               genericRequirements: genericRequirements,
             )
 
-          case .foundationDate, .essentialsDate:
-            // Handled as wrapped struct
-            break
-
-          case .foundationData, .essentialsData:
+          case .foundationDate, .essentialsDate, .foundationData, .essentialsData, .foundationURL, .essentialsURL:
             // Handled as wrapped struct
             break
 
@@ -1043,6 +1036,9 @@ extension JNISwift2JavaGenerator {
           case .foundationDataProtocol, .essentialsDataProtocol:
             return .class(package: nil, name: "DataProtocol")
 
+          case .foundationURL, .essentialsURL:
+            return .class(package: nil, name: "URL")
+
           case .foundationUUID, .essentialsUUID:
             return .javaUtilUUID
 

Sources/JExtractSwiftLib/JNI/JNISwift2JavaGenerator+NativeTranslation.swift

@@ -145,7 +145,7 @@ extension JNISwift2JavaGenerator {
               conversionCheck: nil
             )
 
-          case .foundationDate, .essentialsDate, .foundationData, .essentialsData:
+          case .foundationDate, .essentialsDate, .foundationData, .essentialsData, .foundationURL, .essentialsURL:
             // Handled as wrapped struct
             break
 
@@ -743,7 +743,7 @@ extension JNISwift2JavaGenerator {
               resultName: resultName
             )
 
-          case .foundationDate, .essentialsDate, .foundationData, .essentialsData:
+          case .foundationDate, .essentialsDate, .foundationData, .essentialsData, .foundationURL, .essentialsURL:
             // Handled as wrapped struct
             break
 

Sources/SwiftExtract/SwiftAnalyzer+Foundation.swift

@@ -47,6 +47,12 @@ extension SwiftAnalyzer {
           fakeSourceFilePath: "Foundation/FAKE_FOUNDATION_UUID.swift",
         )
       ],
+      [
+        .init(
+          candidates: [.foundationURL, .essentialsURL],
+          fakeSourceFilePath: "Foundation/FAKE_FOUNDATION_URL.swift",
+        )
+      ],
     ]
 
     for group in groups {

Sources/SwiftExtract/SwiftTypes/SwiftKnownTypeDecls.swift

@@ -52,6 +52,8 @@ public enum SwiftKnownType: Equatable {
   case essentialsDate
   case foundationUUID
   case essentialsUUID
+  case foundationURL
+  case essentialsURL
 
   public init?(kind: SwiftKnownTypeDeclKind, genericArguments: [SwiftType]?) {
     switch kind {
@@ -106,6 +108,8 @@ public enum SwiftKnownType: Equatable {
     case .essentialsDate: self = .essentialsDate
     case .foundationUUID: self = .foundationUUID
     case .essentialsUUID: self = .essentialsUUID
+    case .foundationURL: self = .foundationURL
+    case .essentialsURL: self = .essentialsURL
     }
   }
 
@@ -146,6 +150,8 @@ public enum SwiftKnownType: Equatable {
     case .essentialsDate: .essentialsDate
     case .foundationUUID: .foundationUUID
     case .essentialsUUID: .essentialsUUID
+    case .foundationURL: .foundationURL
+    case .essentialsURL: .essentialsURL
     }
   }
 }
@@ -189,6 +195,8 @@ public enum SwiftKnownTypeDeclKind: String, Hashable {
   case essentialsDate = "FoundationEssentials.Date"
   case foundationUUID = "Foundation.UUID"
   case essentialsUUID = "FoundationEssentials.UUID"
+  case foundationURL = "Foundation.URL"
+  case essentialsURL = "FoundationEssentials.URL"
 
   public var moduleAndName: (module: String, name: String) {
     let qualified = self.rawValue

Sources/SwiftExtract/SwiftTypes/SwiftKnownTypes.swift

@@ -51,6 +51,8 @@ public struct SwiftKnownTypes {
   public var essentialsData: SwiftType { .nominal(SwiftNominalType(nominalTypeDecl: symbolTable[.essentialsData])) }
   public var foundationUUID: SwiftType { .nominal(SwiftNominalType(nominalTypeDecl: symbolTable[.foundationUUID])) }
   public var essentialsUUID: SwiftType { .nominal(SwiftNominalType(nominalTypeDecl: symbolTable[.essentialsUUID])) }
+  public var foundationURL: SwiftType { .nominal(SwiftNominalType(nominalTypeDecl: symbolTable[.foundationURL])) }
+  public var essentialsURL: SwiftType { .nominal(SwiftNominalType(nominalTypeDecl: symbolTable[.essentialsURL])) }
 
   /// `(UnsafeRawPointer, Long) -> ()` function type.
   ///