implement ability to skip generation of javax annotation (#10927)

* commit to implement feedback from #10786 to partially fix #9179

Author: alexanderankin

compiler/src/java_plugin/cpp/java_generator.cpp

@@ -1128,12 +1128,26 @@ static void PrintService(const ServiceDescriptor* service,
   #endif
   // TODO(nmittler): Replace with WriteServiceDocComment once included by protobuf distro.
   GrpcWriteServiceDocComment(p, service, NONE);
-  p->Print(
-      *vars,
-      "@$Generated$(\n"
-      "    value = \"by gRPC proto compiler$grpc_version$\",\n"
-      "    comments = \"Source: $file_name$\")\n"
-      "@$GrpcGenerated$\n");
+
+  if ((*vars)["JakartaMode"] == "javax") {
+    p->Print(
+        *vars,
+        "@javax.annotation.Generated(\n"
+        "    value = \"by gRPC proto compiler$grpc_version$\",\n"
+        "    comments = \"Source: $file_name$\")\n"
+        "@$GrpcGenerated$\n");
+  } else if ((*vars)["JakartaMode"] == "omit") {
+    p->Print(
+        *vars,
+        "@$GrpcGenerated$\n");
+  } else {
+    p->Print(
+        *vars,
+        "@javax.annotation.Generated(\n"
+        "    value = \"by gRPC proto compiler$grpc_version$\",\n"
+        "    comments = \"Source: $file_name$\")\n"
+        "@$GrpcGenerated$\n");
+  }
 
   if (service->options().deprecated()) {
     p->Print(*vars, "@$Deprecated$\n");
@@ -1217,7 +1231,8 @@ void PrintImports(Printer* p) {
 void GenerateService(const ServiceDescriptor* service,
                      protobuf::io::ZeroCopyOutputStream* out,
                      ProtoFlavor flavor,
-                     bool disable_version) {
+                     bool disable_version,
+                     std::string jakarta_mode) {
   // All non-generated classes must be referred by fully qualified names to
   // avoid collision with generated classes.
   std::map<std::string, std::string> vars;
@@ -1249,7 +1264,7 @@ void GenerateService(const ServiceDescriptor* service,
   vars["MethodDescriptor"] = "io.grpc.MethodDescriptor";
   vars["StreamObserver"] = "io.grpc.stub.StreamObserver";
   vars["Iterator"] = "java.util.Iterator";
-  vars["Generated"] = "javax.annotation.Generated";
+  vars["JakartaMode"] = jakarta_mode;
   vars["GrpcGenerated"] = "io.grpc.stub.annotations.GrpcGenerated";
   vars["ListenableFuture"] =
       "com.google.common.util.concurrent.ListenableFuture";

compiler/src/java_plugin/cpp/java_generator.h

@@ -68,7 +68,8 @@ std::string ServiceClassName(const impl::protobuf::ServiceDescriptor* service);
 void GenerateService(const impl::protobuf::ServiceDescriptor* service,
                      impl::protobuf::io::ZeroCopyOutputStream* out,
                      ProtoFlavor flavor,
-                     bool disable_version);
+                     bool disable_version,
+                     std::string jakarta_mode);
 
 }  // namespace java_grpc_generator
 

compiler/src/java_plugin/cpp/java_plugin.cpp

@@ -59,12 +59,23 @@ class JavaGrpcGenerator : public protobuf::compiler::CodeGenerator {
     java_grpc_generator::ProtoFlavor flavor =
         java_grpc_generator::ProtoFlavor::NORMAL;
 
+    /*
+        jakarta_mode has these values:
+        javax, the original behavior - add @javax.annotation.Generated
+        omit, "less controversial" = just add @io.grpc.stub.annotations.GrpcGenerated
+        and maybe others in the future
+    */
+    std::string jakarta_mode;
     bool disable_version = false;
     for (size_t i = 0; i < options.size(); i++) {
       if (options[i].first == "lite") {
         flavor = java_grpc_generator::ProtoFlavor::LITE;
       } else if (options[i].first == "noversion") {
         disable_version = true;
+      } else if (options[i].first == "jakarta_javax") {
+        jakarta_mode = "javax";
+      } else if (options[i].first == "jakarta_omit") {
+        jakarta_mode = "omit";
       }
     }
 
@@ -77,7 +88,7 @@ class JavaGrpcGenerator : public protobuf::compiler::CodeGenerator {
       std::unique_ptr<protobuf::io::ZeroCopyOutputStream> output(
           context->Open(filename));
       java_grpc_generator::GenerateService(
-          service, output.get(), flavor, disable_version);
+          service, output.get(), flavor, disable_version, jakarta_mode);
     }
     return true;
   }