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Skip static requirements in protocols #553

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9d7f21a
Ignore static members in protocol
sidepelican Feb 6, 2026
e3f8b84
Update supported features doc
sidepelican Feb 6, 2026
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20 changes: 20 additions & 0 deletions Samples/SwiftJavaExtractJNISampleApp/Sources/MySwiftLibrary/ProtocolWithStatic.swift
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Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2025 Apple Inc. and the Swift.org project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of Swift.org project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//

public protocol ProtocolWithStatic {
// static requirements are not yet supported.
static func myFunc() -> Int
static var value: Int64 { get }
init()
}
11 changes: 9 additions & 2 deletions Sources/JExtractSwiftLib/JNI/JNISwift2JavaGenerator+JavaBindingsPrinting.swift
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Expand Up @@ -145,16 +145,23 @@ extension JNISwift2JavaGenerator {

printer.printBraceBlock("public interface \(decl.swiftNominal.name)\(extendsString)") { printer in
for initializer in decl.initializers {
printFunctionDowncallMethods(&printer, initializer, skipMethodBody: true)
printer.println()
self.logger.debug("Skipping static method '\(initializer.name)'")
}

for method in decl.methods {
if method.isStatic {
self.logger.debug("Skipping static method '\(method.name)'")
continue
}
printFunctionDowncallMethods(&printer, method, skipMethodBody: true)
printer.println()
}

for variable in decl.variables {
if variable.isStatic {
self.logger.debug("Skipping static property '\(variable.name)'")
continue
}
printFunctionDowncallMethods(&printer, variable, skipMethodBody: true)
printer.println()
}
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1 change: 1 addition & 0 deletions Sources/SwiftJavaDocumentation/Documentation.docc/SupportedFeatures.md
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Expand Up @@ -65,6 +65,7 @@ SwiftJava's `swift-java jextract` tool automates generating Java bindings from S
| Tuples: `(Int, String)`, `(A, B, C)` | ❌ | ❌ |
| Protocols: `protocol` | ❌ | ✅ |
| Protocols: `protocol` with associated types | ❌ | ❌ |
| Protocols static requirements: `static func`, `init(rawValue:)` | ❌ | ❌ |
| Existential parameters `f(x: any SomeProtocol)` (excepts `Any`) | ❌ | ✅ |
| Existential parameters `f(x: any (A & B)) ` | ❌ | ✅ |
| Existential return types `f() -> any Collection` | ❌ | ❌ |
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