java_sdk_library: Add sdk_version for API scopes

Allow the sdk_version against which the stubs for a scope are compiled
to be specified in the module on a per scope basis.

Bug: 155164730
Test: m nothing
Merged-In: I5881e5ee7c2169c30f544882344a60a602dae917
Change-Id: I5881e5ee7c2169c30f544882344a60a602dae917
(cherry picked from commit 87a05a389d9edfa3b83d90aa4c08cb66a29e4caf)

2 files changed, 35 insertions, 0 deletions

diff --git a/java/java_test.go b/java/java_test.go
index 72c4695df..01ddccfc1 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -1247,6 +1247,20 @@ func TestJavaSdkLibrary_InvalidScopes(t *testing.T) {
 		`)
 }
 
+func TestJavaSdkLibrary_SdkVersion_ForScope(t *testing.T) {
+	testJava(t, `
+		java_sdk_library {
+			name: "foo",
+			srcs: ["a.java", "b.java"],
+			api_packages: ["foo"],
+			system: {
+				enabled: true,
+				sdk_version: "module_current",
+			},
+		}
+		`)
+}
+
 var compilerFlagsTestCases = []struct {
 	in  string
 	out bool
diff --git a/java/sdk_library.go b/java/sdk_library.go
index 4a9426499..2650ab3e7 100644
--- a/java/sdk_library.go
+++ b/java/sdk_library.go
@@ -320,6 +320,22 @@ type ApiScopeProperties struct {
 	// Otherwise, if this is not set for any scope then the default  behavior is
 	// scope specific so please refer to the scope specific property documentation.
 	Enabled *bool
+
+	// The sdk_version to use for building the stubs.
+	//
+	// If not specified then it will use an sdk_version determined as follows:
+	// 1) If the sdk_version specified on the java_sdk_library is none then this
+	//    will be none. This is used for java_sdk_library instances that are used
+	//    to create stubs that contribute to the core_current sdk version.
+	// 2) Otherwise, it is assumed that this library extends but does not contribute
+	//    directly to a specific sdk_version and so this uses the sdk_version appropriate
+	//    for the api scope. e.g. public will use sdk_version: current, system will use
+	//    sdk_version: system_current, etc.
+	//
+	// This does not affect the sdk_version used for either generating the stubs source
+	// or the API file. They both have to use the same sdk_version as is used for
+	// compiling the implementation library.
+	Sdk_version *string
 }
 
 type sdkLibraryProperties struct {
@@ -701,6 +717,11 @@ func (module *SdkLibrary) apiDistPath(apiScope *apiScope) string {
 
 // Get the sdk version for use when compiling the stubs library.
 func (module *SdkLibrary) sdkVersionForStubsLibrary(mctx android.EarlyModuleContext, apiScope *apiScope) string {
+	scopeProperties := module.scopeToProperties[apiScope]
+	if scopeProperties.Sdk_version != nil {
+		return proptools.String(scopeProperties.Sdk_version)
+	}
+
 	sdkDep := decodeSdkDep(mctx, sdkContext(&module.Library))
 	if sdkDep.hasStandardLibs() {
 		// If building against a standard sdk then use the sdk version appropriate for the scope.