SwiftExtract: move typealiases

Author: ktoso

Sources/JExtractSwiftLib/JavaSourceDependencies.swift

@@ -24,10 +24,6 @@ import FoundationEssentials
 import Foundation
 #endif
 
-package typealias JavaClassName = String
-package typealias JavaFullyQualifiedClassName = String
-package typealias JavaPackageName = String
-
 extension SourceDependencies {
   /// Inject synthetic `@JavaClass public class <Name> {}` stubs so the symbol
   /// table can resolve Java wrapper types referenced in the Swift API.

Sources/JExtractSwiftLib/SymbolTable+Printing.swift

@@ -0,0 +1,83 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2024-2026 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
+//
+//===----------------------------------------------------------------------===//
+
+import CodePrinting
+import SwiftExtract
+
+extension SwiftSymbolTable {
+  package func printImportedModules(_ printer: inout CodePrinter) {
+    let mainSymbolSourceModules = Set(
+      self.importedModules.values.filter { $0.alternativeModules?.isMainSourceOfSymbols ?? false }.map(\.moduleName)
+    )
+
+    for module in self.importedModules.keys.sorted() {
+      guard module != "Swift" else {
+        continue
+      }
+
+      // Synthetic stub modules (e.g. <javaClassStubs>) exist purely for
+      // symbol-table resolution; they are not real Swift modules and must
+      // not be emitted as `import` statements.
+      guard !self.syntheticImportedModuleNames.contains(module) else {
+        continue
+      }
+
+      guard let alternativeModules = self.importedModules[module]?.alternativeModules else {
+        printer.print("import \(module)")
+        continue
+      }
+
+      // Only the main source of symbols emits the conditional import block.
+      // Secondary modules (e.g. FoundationEssentials when Foundation is the main source)
+      // are skipped when their main source is already present, because the main source's
+      // block already covers the import. If no main source is present, fall back to a
+      // plain import so the module is still imported.
+      guard alternativeModules.isMainSourceOfSymbols else {
+        if mainSymbolSourceModules.isDisjoint(with: alternativeModules.moduleNames) {
+          printer.print("import \(module)")
+        }
+        continue
+      }
+
+      var importGroups: [String: [String]] = [:]
+      for name in alternativeModules.moduleNames {
+        guard let otherModule = self.importedModules[name] else { continue }
+
+        let groupKey = otherModule.requiredAvailablityOfModuleWithName ?? otherModule.moduleName
+        importGroups[groupKey, default: []].append(otherModule.moduleName)
+      }
+
+      for (index, group) in importGroups.keys.sorted().enumerated() {
+        if index > 0 && importGroups.keys.count > 1 {
+          printer.print("#elseif canImport(\(group))")
+        } else {
+          printer.print("#if canImport(\(group))")
+        }
+
+        for groupModule in importGroups[group] ?? [] {
+          printer.print("import \(groupModule)")
+        }
+      }
+
+      if importGroups.keys.isEmpty {
+        printer.print("import \(module)")
+      } else {
+        printer.print("#else")
+        printer.print("import \(module)")
+        printer.print("#endif")
+      }
+    }
+    printer.println()
+  }
+}