Merge changes from topic "no_more_nodeps" into main

* changes:
  Support static_libs for java_import modules
  Support transitive dependencies through android_libary_import modules

java/aar.go

@@ -387,11 +387,6 @@ func (a *aapt) buildActions(ctx android.ModuleContext, opts aaptBuildActionOptio
 	// Add additional manifest files to transitive manifests.
 	additionalManifests := android.PathsForModuleSrc(ctx, a.aaptProperties.Additional_manifests)
 	transitiveManifestPaths := append(android.Paths{manifestPath}, additionalManifests...)
-	// TODO(b/288358614): Soong has historically not merged manifests from dependencies of android_library_import
-	// modules.  Merging manifests from dependencies could remove the need for pom2bp to generate the "-nodeps" copies
-	// of androidx libraries, but doing so triggers errors due to errors introduced by existing dependencies of
-	// android_library_import modules.  If this is fixed, staticManifestsDepSet can be dropped completely in favor of
-	// staticResourcesNodesDepSet.manifests()
 	transitiveManifestPaths = append(transitiveManifestPaths, staticManifestsDepSet.ToList()...)
 
 	if len(transitiveManifestPaths) > 1 && !Bool(a.aaptProperties.Dont_merge_manifests) {
@@ -763,7 +758,8 @@ func aaptLibs(ctx android.ModuleContext, sdkContext android.SdkContext, classLoa
 	// reverse later.
 	// NOTE: this is legacy and probably incorrect behavior, for most other cases (e.g. conflicting classes in
 	// dependencies) the highest priority dependency is listed first, but for resources the highest priority
-	// dependency has to be listed last.
+	// dependency has to be listed last.  This is also inconsistent with the way manifests from the same
+	// transitive dependencies are merged.
 	staticResourcesNodes = android.NewDepSet(android.TOPOLOGICAL, nil,
 		android.ReverseSliceInPlace(staticResourcesNodeDepSets))
 	sharedResourcesNodes = android.NewDepSet(android.TOPOLOGICAL, nil,
@@ -978,7 +974,8 @@ type AARImport struct {
 
 	properties AARImportProperties
 
-	classpathFile                      android.WritablePath
+	headerJarFile                      android.WritablePath
+	implementationJarFile              android.WritablePath
 	proguardFlags                      android.WritablePath
 	exportPackage                      android.WritablePath
 	transitiveAaptResourcePackagesFile android.Path
@@ -999,6 +996,9 @@ type AARImport struct {
 	sdkVersion    android.SdkSpec
 	minSdkVersion android.ApiLevel
 
+	usesLibrary
+	classLoaderContexts dexpreopt.ClassLoaderContextMap
+
 	// Single aconfig "cache file" merged from this module and all dependencies.
 	mergedAconfigFiles map[string]android.Paths
 }
@@ -1011,7 +1011,7 @@ func (a *AARImport) OutputFiles(tag string) (android.Paths, error) {
 	case ".aar":
 		return []android.Path{a.aarPath}, nil
 	case "":
-		return []android.Path{a.classpathFile}, nil
+		return []android.Path{a.implementationJarFile}, nil
 	default:
 		return nil, fmt.Errorf("unsupported module reference tag %q", tag)
 	}
@@ -1094,6 +1094,8 @@ func (a *AARImport) DepsMutator(ctx android.BottomUpMutatorContext) {
 
 	ctx.AddVariationDependencies(nil, libTag, a.properties.Libs...)
 	ctx.AddVariationDependencies(nil, staticLibTag, a.properties.Static_libs...)
+
+	a.usesLibrary.deps(ctx, false)
 }
 
 type JniPackageInfo struct {
@@ -1152,7 +1154,7 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	}
 
 	extractedAARDir := android.PathForModuleOut(ctx, "aar")
-	a.classpathFile = extractedAARDir.Join(ctx, "classes-combined.jar")
+	classpathFile := extractedAARDir.Join(ctx, "classes-combined.jar")
 	a.manifest = extractedAARDir.Join(ctx, "AndroidManifest.xml")
 	a.rTxt = extractedAARDir.Join(ctx, "R.txt")
 	a.assetsPackage = android.PathForModuleOut(ctx, "assets.zip")
@@ -1168,11 +1170,11 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	ctx.Build(pctx, android.BuildParams{
 		Rule:        unzipAAR,
 		Input:       a.aarPath,
-		Outputs:     android.WritablePaths{a.classpathFile, a.proguardFlags, a.manifest, a.assetsPackage, a.rTxt},
+		Outputs:     android.WritablePaths{classpathFile, a.proguardFlags, a.manifest, a.assetsPackage, a.rTxt},
 		Description: "unzip AAR",
 		Args: map[string]string{
 			"outDir":             extractedAARDir.String(),
-			"combinedClassesJar": a.classpathFile.String(),
+			"combinedClassesJar": classpathFile.String(),
 			"assetsPackage":      a.assetsPackage.String(),
 		},
 	})
@@ -1245,13 +1247,7 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	a.resourcesNodesDepSet = resourcesNodesDepSetBuilder.Build()
 
 	manifestDepSetBuilder := android.NewDepSetBuilder[android.Path](android.TOPOLOGICAL).Direct(a.manifest)
-	// TODO(b/288358614): Soong has historically not merged manifests from dependencies of android_library_import
+	manifestDepSetBuilder.Transitive(staticManifestsDepSet)
-	// modules.  Merging manifests from dependencies could remove the need for pom2bp to generate the "-nodeps" copies
-	// of androidx libraries, but doing so triggers errors due to errors introduced by existing dependencies of
-	// android_library_import modules.  If this is fixed, AndroidLibraryDependency.ManifestsDepSet can be dropped
-	// completely in favor of AndroidLibraryDependency.ResourceNodesDepSet.manifest
-	//manifestDepSetBuilder.Transitive(transitiveStaticDeps.manifests)
-	_ = staticManifestsDepSet
 	a.manifestsDepSet = manifestDepSetBuilder.Build()
 
 	transitiveAaptResourcePackages := staticDeps.resPackages().Strings()
@@ -1263,12 +1259,45 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	a.transitiveAaptResourcePackagesFile = transitiveAaptResourcePackagesFile
 
 	a.collectTransitiveHeaderJars(ctx)
+
+	a.classLoaderContexts = a.usesLibrary.classLoaderContextForUsesLibDeps(ctx)
+
+	var staticJars android.Paths
+	var staticHeaderJars android.Paths
+	ctx.VisitDirectDeps(func(module android.Module) {
+		if dep, ok := android.OtherModuleProvider(ctx, module, JavaInfoProvider); ok {
+			tag := ctx.OtherModuleDependencyTag(module)
+			switch tag {
+			case staticLibTag:
+				staticJars = append(staticJars, dep.ImplementationJars...)
+				staticHeaderJars = append(staticHeaderJars, dep.HeaderJars...)
+			}
+		}
+		addCLCFromDep(ctx, module, a.classLoaderContexts)
+	})
+
+	if len(staticJars) > 0 {
+		combineJars := append(android.Paths{classpathFile}, staticJars...)
+		a.implementationJarFile = android.PathForModuleOut(ctx, "combined", ctx.ModuleName()+".jar")
+		TransformJarsToJar(ctx, a.implementationJarFile, "combine", combineJars, android.OptionalPath{}, false, nil, nil)
+	} else {
+		a.implementationJarFile = classpathFile
+	}
+
+	if len(staticHeaderJars) > 0 {
+		combineJars := append(android.Paths{classpathFile}, staticHeaderJars...)
+		a.headerJarFile = android.PathForModuleOut(ctx, "turbine-combined", ctx.ModuleName()+".jar")
+		TransformJarsToJar(ctx, a.headerJarFile, "combine header jars", combineJars, android.OptionalPath{}, false, nil, nil)
+	} else {
+		a.headerJarFile = classpathFile
+	}
+
 	android.SetProvider(ctx, JavaInfoProvider, JavaInfo{
-		HeaderJars:                     android.PathsIfNonNil(a.classpathFile),
+		HeaderJars:                     android.PathsIfNonNil(a.headerJarFile),
 		TransitiveLibsHeaderJars:       a.transitiveLibsHeaderJars,
 		TransitiveStaticLibsHeaderJars: a.transitiveStaticLibsHeaderJars,
-		ImplementationAndResourcesJars: android.PathsIfNonNil(a.classpathFile),
+		ImplementationAndResourcesJars: android.PathsIfNonNil(a.implementationJarFile),
-		ImplementationJars:             android.PathsIfNonNil(a.classpathFile),
+		ImplementationJars:             android.PathsIfNonNil(a.implementationJarFile),
 		StubsLinkType:                  Implementation,
 		// TransitiveAconfigFiles: // TODO(b/289117800): LOCAL_ACONFIG_FILES for prebuilts
 	})
@@ -1301,15 +1330,15 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 }
 
 func (a *AARImport) HeaderJars() android.Paths {
-	return android.Paths{a.classpathFile}
+	return android.Paths{a.headerJarFile}
 }
 
 func (a *AARImport) ImplementationAndResourcesJars() android.Paths {
-	return android.Paths{a.classpathFile}
+	return android.Paths{a.implementationJarFile}
 }
 
-func (a *AARImport) DexJarBuildPath(ctx android.ModuleErrorfContext) android.Path {
+func (a *AARImport) DexJarBuildPath(ctx android.ModuleErrorfContext) OptionalDexJarPath {
-	return nil
+	return OptionalDexJarPath{}
 }
 
 func (a *AARImport) DexJarInstallPath() android.Path {
@@ -1317,9 +1346,11 @@ func (a *AARImport) DexJarInstallPath() android.Path {
 }
 
 func (a *AARImport) ClassLoaderContexts() dexpreopt.ClassLoaderContextMap {
-	return nil
+	return a.classLoaderContexts
 }
 
+var _ UsesLibraryDependency = (*AARImport)(nil)
+
 var _ android.ApexModule = (*AARImport)(nil)
 
 // Implements android.ApexModule
@@ -1328,7 +1359,7 @@ func (a *AARImport) DepIsInSameApex(ctx android.BaseModuleContext, dep android.M
 }
 
 // Implements android.ApexModule
-func (g *AARImport) ShouldSupportSdkVersion(ctx android.BaseModuleContext,
+func (a *AARImport) ShouldSupportSdkVersion(ctx android.BaseModuleContext,
 	sdkVersion android.ApiLevel) error {
 	return nil
 }
@@ -1342,7 +1373,10 @@ var _ android.PrebuiltInterface = (*AARImport)(nil)
 func AARImportFactory() android.Module {
 	module := &AARImport{}
 
-	module.AddProperties(&module.properties)
+	module.AddProperties(
+		&module.properties,
+		&module.usesLibrary.usesLibraryProperties,
+	)
 
 	android.InitPrebuiltModule(module, &module.properties.Aars)
 	android.InitApexModule(module)

java/android_manifest_test.go

@@ -92,10 +92,9 @@ func TestManifestMerger(t *testing.T) {
 			"out/soong/.intermediates/transitive/android_common/manifest_fixer/AndroidManifest.xml",
 			"transitive/AndroidManifest2.xml",
 			"out/soong/.intermediates/transitive_import/android_common/aar/AndroidManifest.xml",
+			"out/soong/.intermediates/transitive_import_dep/android_common/aar/AndroidManifest.xml",
 			"out/soong/.intermediates/direct_import/android_common/aar/AndroidManifest.xml",
-			// TODO(b/288358614): Soong has historically not merged manifests from dependencies of
+			"out/soong/.intermediates/direct_import_dep/android_common/aar/AndroidManifest.xml",
-			// android_library_import modules.
-
 		},
 		manifestMergerRule.Implicits)
 }

java/androidmk.go

@@ -211,7 +211,7 @@ func (prebuilt *Import) AndroidMkEntries() []android.AndroidMkEntries {
 	return []android.AndroidMkEntries{android.AndroidMkEntries{
 		Class:        "JAVA_LIBRARIES",
 		OverrideName: prebuilt.BaseModuleName(),
-		OutputFile:   android.OptionalPathForPath(prebuilt.combinedClasspathFile),
+		OutputFile:   android.OptionalPathForPath(prebuilt.combinedImplementationFile),
 		Include:      "$(BUILD_SYSTEM)/soong_java_prebuilt.mk",
 		ExtraEntries: []android.AndroidMkExtraEntriesFunc{
 			func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
@@ -219,8 +219,8 @@ func (prebuilt *Import) AndroidMkEntries() []android.AndroidMkEntries {
 				if prebuilt.dexJarFile.IsSet() {
 					entries.SetPath("LOCAL_SOONG_DEX_JAR", prebuilt.dexJarFile.Path())
 				}
-				entries.SetPath("LOCAL_SOONG_HEADER_JAR", prebuilt.combinedClasspathFile)
+				entries.SetPath("LOCAL_SOONG_HEADER_JAR", prebuilt.combinedHeaderFile)
-				entries.SetPath("LOCAL_SOONG_CLASSES_JAR", prebuilt.combinedClasspathFile)
+				entries.SetPath("LOCAL_SOONG_CLASSES_JAR", prebuilt.combinedImplementationFile)
 				entries.SetString("LOCAL_SDK_VERSION", prebuilt.sdkVersion.String())
 				entries.SetString("LOCAL_MODULE_STEM", prebuilt.Stem())
 				// TODO(b/289117800): LOCAL_ACONFIG_FILES for prebuilts
@@ -262,13 +262,13 @@ func (prebuilt *AARImport) AndroidMkEntries() []android.AndroidMkEntries {
 	}
 	return []android.AndroidMkEntries{android.AndroidMkEntries{
 		Class:      "JAVA_LIBRARIES",
-		OutputFile: android.OptionalPathForPath(prebuilt.classpathFile),
+		OutputFile: android.OptionalPathForPath(prebuilt.implementationJarFile),
 		Include:    "$(BUILD_SYSTEM)/soong_java_prebuilt.mk",
 		ExtraEntries: []android.AndroidMkExtraEntriesFunc{
 			func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
 				entries.SetBool("LOCAL_UNINSTALLABLE_MODULE", true)
-				entries.SetPath("LOCAL_SOONG_HEADER_JAR", prebuilt.classpathFile)
+				entries.SetPath("LOCAL_SOONG_HEADER_JAR", prebuilt.headerJarFile)
-				entries.SetPath("LOCAL_SOONG_CLASSES_JAR", prebuilt.classpathFile)
+				entries.SetPath("LOCAL_SOONG_CLASSES_JAR", prebuilt.implementationJarFile)
 				entries.SetPath("LOCAL_SOONG_RESOURCE_EXPORT_PACKAGE", prebuilt.exportPackage)
 				entries.SetPath("LOCAL_SOONG_TRANSITIVE_RES_PACKAGES", prebuilt.transitiveAaptResourcePackagesFile)
 				entries.SetPath("LOCAL_SOONG_EXPORT_PROGUARD_FLAGS", prebuilt.proguardFlags)

java/app_test.go

@@ -829,12 +829,12 @@ func TestAndroidResourceProcessor(t *testing.T) {
 				"out/soong/.intermediates/default/java/android_stubs_current/android_common/turbine-combined/android_stubs_current.jar",
 				"out/soong/.intermediates/shared/android_common/turbine-combined/shared.jar",
 				"out/soong/.intermediates/direct/android_common/turbine-combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/turbine-combined/direct_import.jar",
 			},
 			appCombined: []string{
 				"out/soong/.intermediates/app/android_common/javac/app.jar",
 				"out/soong/.intermediates/direct/android_common/combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/combined/direct_import.jar",
 			},
 
 			directResources: nil,
@@ -849,12 +849,12 @@ func TestAndroidResourceProcessor(t *testing.T) {
 			directClasspath: []string{
 				"out/soong/.intermediates/default/java/android_stubs_current/android_common/turbine-combined/android_stubs_current.jar",
 				"out/soong/.intermediates/transitive/android_common/turbine-combined/transitive.jar",
-				"out/soong/.intermediates/transitive_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/transitive_import/android_common/turbine-combined/transitive_import.jar",
 			},
 			directCombined: []string{
 				"out/soong/.intermediates/direct/android_common/javac/direct.jar",
 				"out/soong/.intermediates/transitive/android_common/javac/transitive.jar",
-				"out/soong/.intermediates/transitive_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/transitive_import/android_common/combined/transitive_import.jar",
 			},
 
 			transitiveResources: []string{"out/soong/.intermediates/transitive/android_common/aapt2/transitive/res/values_strings.arsc.flat"},
@@ -928,13 +928,13 @@ func TestAndroidResourceProcessor(t *testing.T) {
 				"out/soong/.intermediates/app/android_common/busybox/R.jar",
 				"out/soong/.intermediates/shared/android_common/turbine-combined/shared.jar",
 				"out/soong/.intermediates/direct/android_common/turbine-combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/turbine-combined/direct_import.jar",
 			},
 			appCombined: []string{
 				"out/soong/.intermediates/app/android_common/javac/app.jar",
 				"out/soong/.intermediates/app/android_common/busybox/R.jar",
 				"out/soong/.intermediates/direct/android_common/combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/combined/direct_import.jar",
 			},
 
 			directResources: nil,
@@ -953,12 +953,12 @@ func TestAndroidResourceProcessor(t *testing.T) {
 				"out/soong/.intermediates/transitive_import_dep/android_common/busybox/R.jar",
 				"out/soong/.intermediates/transitive_import/android_common/busybox/R.jar",
 				"out/soong/.intermediates/transitive/android_common/turbine-combined/transitive.jar",
-				"out/soong/.intermediates/transitive_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/transitive_import/android_common/turbine-combined/transitive_import.jar",
 			},
 			directCombined: []string{
 				"out/soong/.intermediates/direct/android_common/javac/direct.jar",
 				"out/soong/.intermediates/transitive/android_common/javac/transitive.jar",
-				"out/soong/.intermediates/transitive_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/transitive_import/android_common/combined/transitive_import.jar",
 			},
 
 			transitiveResources: []string{"out/soong/.intermediates/transitive/android_common/aapt2/transitive/res/values_strings.arsc.flat"},
@@ -1034,13 +1034,13 @@ func TestAndroidResourceProcessor(t *testing.T) {
 				"out/soong/.intermediates/app/android_common/busybox/R.jar",
 				"out/soong/.intermediates/shared/android_common/turbine-combined/shared.jar",
 				"out/soong/.intermediates/direct/android_common/turbine-combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/turbine-combined/direct_import.jar",
 			},
 			appCombined: []string{
 				"out/soong/.intermediates/app/android_common/javac/app.jar",
 				"out/soong/.intermediates/app/android_common/busybox/R.jar",
 				"out/soong/.intermediates/direct/android_common/combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/combined/direct_import.jar",
 			},
 
 			dontVerifyDirect:           true,
@@ -1075,12 +1075,12 @@ func TestAndroidResourceProcessor(t *testing.T) {
 				"out/soong/.intermediates/default/java/android_stubs_current/android_common/turbine-combined/android_stubs_current.jar",
 				"out/soong/.intermediates/shared/android_common/turbine-combined/shared.jar",
 				"out/soong/.intermediates/direct/android_common/turbine-combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/turbine-combined/direct_import.jar",
 			},
 			appCombined: []string{
 				"out/soong/.intermediates/app/android_common/javac/app.jar",
 				"out/soong/.intermediates/direct/android_common/combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/combined/direct_import.jar",
 			},
 
 			directResources: nil,
@@ -1098,12 +1098,12 @@ func TestAndroidResourceProcessor(t *testing.T) {
 				"out/soong/.intermediates/transitive_import_dep/android_common/busybox/R.jar",
 				"out/soong/.intermediates/transitive_import/android_common/busybox/R.jar",
 				"out/soong/.intermediates/transitive/android_common/turbine-combined/transitive.jar",
-				"out/soong/.intermediates/transitive_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/transitive_import/android_common/turbine-combined/transitive_import.jar",
 			},
 			directCombined: []string{
 				"out/soong/.intermediates/direct/android_common/javac/direct.jar",
 				"out/soong/.intermediates/transitive/android_common/javac/transitive.jar",
-				"out/soong/.intermediates/transitive_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/transitive_import/android_common/combined/transitive_import.jar",
 			},
 
 			dontVerifyTransitive:       true,
@@ -1137,12 +1137,12 @@ func TestAndroidResourceProcessor(t *testing.T) {
 				"out/soong/.intermediates/default/java/android_stubs_current/android_common/turbine-combined/android_stubs_current.jar",
 				"out/soong/.intermediates/shared/android_common/turbine-combined/shared.jar",
 				"out/soong/.intermediates/direct/android_common/turbine-combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/turbine-combined/direct_import.jar",
 			},
 			appCombined: []string{
 				"out/soong/.intermediates/app/android_common/javac/app.jar",
 				"out/soong/.intermediates/direct/android_common/combined/direct.jar",
-				"out/soong/.intermediates/direct_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/direct_import/android_common/combined/direct_import.jar",
 			},
 
 			directResources: nil,
@@ -1157,12 +1157,12 @@ func TestAndroidResourceProcessor(t *testing.T) {
 			directClasspath: []string{
 				"out/soong/.intermediates/default/java/android_stubs_current/android_common/turbine-combined/android_stubs_current.jar",
 				"out/soong/.intermediates/transitive/android_common/turbine-combined/transitive.jar",
-				"out/soong/.intermediates/transitive_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/transitive_import/android_common/turbine-combined/transitive_import.jar",
 			},
 			directCombined: []string{
 				"out/soong/.intermediates/direct/android_common/javac/direct.jar",
 				"out/soong/.intermediates/transitive/android_common/javac/transitive.jar",
-				"out/soong/.intermediates/transitive_import/android_common/aar/classes-combined.jar",
+				"out/soong/.intermediates/transitive_import/android_common/combined/transitive_import.jar",
 			},
 
 			transitiveResources: []string{"out/soong/.intermediates/transitive/android_common/aapt2/transitive/res/values_strings.arsc.flat"},

java/java.go

@@ -21,6 +21,7 @@ package java
 import (
 	"fmt"
 	"path/filepath"
+	"slices"
 	"sort"
 	"strings"
 
@@ -2337,6 +2338,9 @@ type ImportProperties struct {
 	// List of shared java libs that this module has dependencies to
 	Libs []string
 
+	// List of static java libs that this module has dependencies to
+	Static_libs []string
+
 	// List of files to remove from the jar file(s)
 	Exclude_files []string
 
@@ -2389,9 +2393,10 @@ type Import struct {
 	dexJarFileErr     error
 	dexJarInstallFile android.Path
 
-	combinedClasspathFile android.Path
+	combinedImplementationFile android.Path
-	classLoaderContexts   dexpreopt.ClassLoaderContextMap
+	combinedHeaderFile         android.Path
-	exportAidlIncludeDirs android.Paths
+	classLoaderContexts        dexpreopt.ClassLoaderContextMap
+	exportAidlIncludeDirs      android.Paths
 
 	hideApexVariantFromMake bool
 
@@ -2475,6 +2480,7 @@ func (j *Import) setStrictUpdatabilityLinting(bool) {
 
 func (j *Import) DepsMutator(ctx android.BottomUpMutatorContext) {
 	ctx.AddVariationDependencies(nil, libTag, j.properties.Libs...)
+	ctx.AddVariationDependencies(nil, staticLibTag, j.properties.Static_libs...)
 
 	if ctx.Device() && Bool(j.dexProperties.Compile_dex) {
 		sdkDeps(ctx, android.SdkContext(j), j.dexer)
@@ -2504,23 +2510,13 @@ func (j *Import) commonBuildActions(ctx android.ModuleContext) {
 func (j *Import) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	j.commonBuildActions(ctx)
 
-	jars := android.PathsForModuleSrc(ctx, j.properties.Jars)
-
-	jarName := j.Stem() + ".jar"
-	outputFile := android.PathForModuleOut(ctx, "combined", jarName)
-	TransformJarsToJar(ctx, outputFile, "for prebuilts", jars, android.OptionalPath{},
-		false, j.properties.Exclude_files, j.properties.Exclude_dirs)
-	if Bool(j.properties.Jetifier) {
-		inputFile := outputFile
-		outputFile = android.PathForModuleOut(ctx, "jetifier", jarName)
-		TransformJetifier(ctx, outputFile, inputFile)
-	}
-	j.combinedClasspathFile = outputFile
 	j.classLoaderContexts = make(dexpreopt.ClassLoaderContextMap)
 
 	var flags javaBuilderFlags
 
 	j.collectTransitiveHeaderJars(ctx)
+	var staticJars android.Paths
+	var staticHeaderJars android.Paths
 	ctx.VisitDirectDeps(func(module android.Module) {
 		tag := ctx.OtherModuleDependencyTag(module)
 		if dep, ok := android.OtherModuleProvider(ctx, module, JavaInfoProvider); ok {
@@ -2530,6 +2526,8 @@ func (j *Import) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 				flags.dexClasspath = append(flags.dexClasspath, dep.HeaderJars...)
 			case staticLibTag:
 				flags.classpath = append(flags.classpath, dep.HeaderJars...)
+				staticJars = append(staticJars, dep.ImplementationAndResourcesJars...)
+				staticHeaderJars = append(staticHeaderJars, dep.HeaderJars...)
 			case bootClasspathTag:
 				flags.bootClasspath = append(flags.bootClasspath, dep.HeaderJars...)
 			}
@@ -2543,6 +2541,46 @@ func (j *Import) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 		addCLCFromDep(ctx, module, j.classLoaderContexts)
 	})
 
+	jars := android.PathsForModuleSrc(ctx, j.properties.Jars)
+	jarName := j.Stem() + ".jar"
+
+	// Always pass the input jars to TransformJarsToJar, even if there is only a single jar, we need the output
+	// file of the module to be named jarName.
+	outputFile := android.PathForModuleOut(ctx, "combined", jarName)
+	implementationJars := append(slices.Clone(jars), staticJars...)
+	TransformJarsToJar(ctx, outputFile, "combine prebuilt implementation jars", implementationJars, android.OptionalPath{},
+		false, j.properties.Exclude_files, j.properties.Exclude_dirs)
+
+	// If no dependencies have separate header jars then there is no need to create a separate
+	// header jar for this module.
+	reuseImplementationJarAsHeaderJar := slices.Equal(staticJars, staticHeaderJars)
+
+	var headerOutputFile android.WritablePath
+	if reuseImplementationJarAsHeaderJar {
+		headerOutputFile = outputFile
+	} else {
+		headerJars := append(slices.Clone(jars), staticHeaderJars...)
+		headerOutputFile = android.PathForModuleOut(ctx, "turbine-combined", jarName)
+		TransformJarsToJar(ctx, headerOutputFile, "combine prebuilt header jars", headerJars, android.OptionalPath{},
+			false, j.properties.Exclude_files, j.properties.Exclude_dirs)
+	}
+
+	if Bool(j.properties.Jetifier) {
+		inputFile := outputFile
+		outputFile = android.PathForModuleOut(ctx, "jetifier", jarName)
+		TransformJetifier(ctx, outputFile, inputFile)
+
+		if !reuseImplementationJarAsHeaderJar {
+			headerInputFile := headerOutputFile
+			headerOutputFile = android.PathForModuleOut(ctx, "jetifier-headers", jarName)
+			TransformJetifier(ctx, headerOutputFile, headerInputFile)
+		} else {
+			headerOutputFile = outputFile
+		}
+	}
+	j.combinedHeaderFile = headerOutputFile
+	j.combinedImplementationFile = outputFile
+
 	j.maybeInstall(ctx, jarName, outputFile)
 
 	j.exportAidlIncludeDirs = android.PathsForModuleSrc(ctx, j.properties.Aidl.Export_include_dirs)
@@ -2626,11 +2664,11 @@ func (j *Import) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	}
 
 	android.SetProvider(ctx, JavaInfoProvider, JavaInfo{
-		HeaderJars:                     android.PathsIfNonNil(j.combinedClasspathFile),
+		HeaderJars:                     android.PathsIfNonNil(j.combinedHeaderFile),
 		TransitiveLibsHeaderJars:       j.transitiveLibsHeaderJars,
 		TransitiveStaticLibsHeaderJars: j.transitiveStaticLibsHeaderJars,
-		ImplementationAndResourcesJars: android.PathsIfNonNil(j.combinedClasspathFile),
+		ImplementationAndResourcesJars: android.PathsIfNonNil(j.combinedImplementationFile),
-		ImplementationJars:             android.PathsIfNonNil(j.combinedClasspathFile),
+		ImplementationJars:             android.PathsIfNonNil(j.combinedImplementationFile),
 		AidlIncludeDirs:                j.exportAidlIncludeDirs,
 		StubsLinkType:                  j.stubsLinkType,
 		// TODO(b/289117800): LOCAL_ACONFIG_FILES for prebuilts
@@ -2658,7 +2696,7 @@ func (j *Import) maybeInstall(ctx android.ModuleContext, jarName string, outputF
 func (j *Import) OutputFiles(tag string) (android.Paths, error) {
 	switch tag {
 	case "", ".jar":
-		return android.Paths{j.combinedClasspathFile}, nil
+		return android.Paths{j.combinedImplementationFile}, nil
 	default:
 		return nil, fmt.Errorf("unsupported module reference tag %q", tag)
 	}
@@ -2667,17 +2705,11 @@ func (j *Import) OutputFiles(tag string) (android.Paths, error) {
 var _ android.OutputFileProducer = (*Import)(nil)
 
 func (j *Import) HeaderJars() android.Paths {
-	if j.combinedClasspathFile == nil {
+	return android.PathsIfNonNil(j.combinedHeaderFile)
-		return nil
-	}
-	return android.Paths{j.combinedClasspathFile}
 }
 
 func (j *Import) ImplementationAndResourcesJars() android.Paths {
-	if j.combinedClasspathFile == nil {
+	return android.PathsIfNonNil(j.combinedImplementationFile)
-		return nil
-	}
-	return android.Paths{j.combinedClasspathFile}
 }
 
 func (j *Import) DexJarBuildPath(ctx android.ModuleErrorfContext) OptionalDexJarPath {

java/java_test.go

@@ -588,10 +588,11 @@ func TestPrebuilts(t *testing.T) {
 	javac := fooModule.Rule("javac")
 	combineJar := ctx.ModuleForTests("foo", "android_common").Description("for javac")
 	barModule := ctx.ModuleForTests("bar", "android_common")
-	barJar := barModule.Rule("combineJar").Output
+	barJar := barModule.Output("combined/bar.jar").Output
 	bazModule := ctx.ModuleForTests("baz", "android_common")
 	bazJar := bazModule.Rule("combineJar").Output
-	sdklibStubsJar := ctx.ModuleForTests("sdklib.stubs", "android_common").Rule("combineJar").Output
+	sdklibStubsJar := ctx.ModuleForTests("sdklib.stubs", "android_common").
+		Output("combined/sdklib.stubs.jar").Output
 
 	fooLibrary := fooModule.Module().(*Library)
 	assertDeepEquals(t, "foo unique sources incorrect",
@@ -1035,7 +1036,7 @@ func TestExcludeFileGroupInSrcs(t *testing.T) {
 	}
 }
 
-func TestJavaLibrary(t *testing.T) {
+func TestJavaLibraryOutputFiles(t *testing.T) {
 	testJavaWithFS(t, "", map[string][]byte{
 		"libcore/Android.bp": []byte(`
 				java_library {
@@ -1052,7 +1053,7 @@ func TestJavaLibrary(t *testing.T) {
 	})
 }
 
-func TestJavaImport(t *testing.T) {
+func TestJavaImportOutputFiles(t *testing.T) {
 	testJavaWithFS(t, "", map[string][]byte{
 		"libcore/Android.bp": []byte(`
 				java_import {
@@ -1068,6 +1069,85 @@ func TestJavaImport(t *testing.T) {
 	})
 }
 
+func TestJavaImport(t *testing.T) {
+	bp := `
+		java_library {
+			name: "source_library",
+			srcs: ["source.java"],
+		}
+
+		java_import {
+			name: "import_with_no_deps",
+			jars: ["no_deps.jar"],
+		}
+
+		java_import {
+			name: "import_with_source_deps",
+			jars: ["source_deps.jar"],
+			static_libs: ["source_library"],
+		}
+
+		java_import {
+			name: "import_with_import_deps",
+			jars: ["import_deps.jar"],
+			static_libs: ["import_with_no_deps"],
+		}
+	`
+	ctx := android.GroupFixturePreparers(
+		PrepareForTestWithJavaDefaultModules,
+	).RunTestWithBp(t, bp)
+
+	source := ctx.ModuleForTests("source_library", "android_common")
+	sourceJar := source.Output("javac/source_library.jar")
+	sourceHeaderJar := source.Output("turbine-combined/source_library.jar")
+	sourceJavaInfo, _ := android.SingletonModuleProvider(ctx, source.Module(), JavaInfoProvider)
+
+	// The source library produces separate implementation and header jars
+	android.AssertPathsRelativeToTopEquals(t, "source library implementation jar",
+		[]string{sourceJar.Output.String()}, sourceJavaInfo.ImplementationAndResourcesJars)
+	android.AssertPathsRelativeToTopEquals(t, "source library header jar",
+		[]string{sourceHeaderJar.Output.String()}, sourceJavaInfo.HeaderJars)
+
+	importWithNoDeps := ctx.ModuleForTests("import_with_no_deps", "android_common")
+	importWithNoDepsJar := importWithNoDeps.Output("combined/import_with_no_deps.jar")
+	importWithNoDepsJavaInfo, _ := android.SingletonModuleProvider(ctx, importWithNoDeps.Module(), JavaInfoProvider)
+
+	// An import with no deps produces a single jar used as both the header and implementation jar.
+	android.AssertPathsRelativeToTopEquals(t, "import with no deps implementation jar",
+		[]string{importWithNoDepsJar.Output.String()}, importWithNoDepsJavaInfo.ImplementationAndResourcesJars)
+	android.AssertPathsRelativeToTopEquals(t, "import with no deps header jar",
+		[]string{importWithNoDepsJar.Output.String()}, importWithNoDepsJavaInfo.HeaderJars)
+	android.AssertPathsRelativeToTopEquals(t, "import with no deps combined inputs",
+		[]string{"no_deps.jar"}, importWithNoDepsJar.Inputs)
+
+	importWithSourceDeps := ctx.ModuleForTests("import_with_source_deps", "android_common")
+	importWithSourceDepsJar := importWithSourceDeps.Output("combined/import_with_source_deps.jar")
+	importWithSourceDepsHeaderJar := importWithSourceDeps.Output("turbine-combined/import_with_source_deps.jar")
+	importWithSourceDepsJavaInfo, _ := android.SingletonModuleProvider(ctx, importWithSourceDeps.Module(), JavaInfoProvider)
+
+	// An import with source deps produces separate header and implementation jars.
+	android.AssertPathsRelativeToTopEquals(t, "import with source deps implementation jar",
+		[]string{importWithSourceDepsJar.Output.String()}, importWithSourceDepsJavaInfo.ImplementationAndResourcesJars)
+	android.AssertPathsRelativeToTopEquals(t, "import with source deps header jar",
+		[]string{importWithSourceDepsHeaderJar.Output.String()}, importWithSourceDepsJavaInfo.HeaderJars)
+	android.AssertPathsRelativeToTopEquals(t, "import with source deps combined implementation jar inputs",
+		[]string{"source_deps.jar", sourceJar.Output.String()}, importWithSourceDepsJar.Inputs)
+	android.AssertPathsRelativeToTopEquals(t, "import with source deps combined header jar inputs",
+		[]string{"source_deps.jar", sourceHeaderJar.Output.String()}, importWithSourceDepsHeaderJar.Inputs)
+
+	importWithImportDeps := ctx.ModuleForTests("import_with_import_deps", "android_common")
+	importWithImportDepsJar := importWithImportDeps.Output("combined/import_with_import_deps.jar")
+	importWithImportDepsJavaInfo, _ := android.SingletonModuleProvider(ctx, importWithImportDeps.Module(), JavaInfoProvider)
+
+	// An import with only import deps produces a single jar used as both the header and implementation jar.
+	android.AssertPathsRelativeToTopEquals(t, "import with import deps implementation jar",
+		[]string{importWithImportDepsJar.Output.String()}, importWithImportDepsJavaInfo.ImplementationAndResourcesJars)
+	android.AssertPathsRelativeToTopEquals(t, "import with import deps header jar",
+		[]string{importWithImportDepsJar.Output.String()}, importWithImportDepsJavaInfo.HeaderJars)
+	android.AssertPathsRelativeToTopEquals(t, "import with import deps combined implementation jar inputs",
+		[]string{"import_deps.jar", importWithNoDepsJar.Output.String()}, importWithImportDepsJar.Inputs)
+}
+
 var compilerFlagsTestCases = []struct {
 	in  string
 	out bool