Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/src/google/protobuf/compiler/java/java_enum.cc

Index: third_party/protobuf/src/google/protobuf/compiler/java/java_enum.cc
diff --git a/third_party/protobuf/src/google/protobuf/compiler/java/java_enum.cc b/third_party/protobuf/src/google/protobuf/compiler/java/java_enum.cc
index b9ee00ff421eb851356b34dff4bd49e2cc1063b4..947b80e4147d36521f019e3304f0f147ea072ed9 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/java/java_enum.cc
+++ b/third_party/protobuf/src/google/protobuf/compiler/java/java_enum.cc
@@ -49,6 +49,17 @@ namespace protobuf {
 namespace compiler {
 namespace java {
 
+namespace {
+bool EnumHasCustomOptions(const EnumDescriptor* descriptor) {
+  if (descriptor->options().unknown_fields().field_count() > 0) return true;
+  for (int i = 0; i < descriptor->value_count(); ++i) {
+    const EnumValueDescriptor* value = descriptor->value(i);
+    if (value->options().unknown_fields().field_count() > 0) return true;
+  }
+  return false;
+}
+}  // namespace
+
 EnumGenerator::EnumGenerator(const EnumDescriptor* descriptor,
                              bool immutable_api,
                              Context* context)
@@ -75,12 +86,10 @@ EnumGenerator::~EnumGenerator() {}
 
 void EnumGenerator::Generate(io::Printer* printer) {
   WriteEnumDocComment(printer, descriptor_);
-  MaybePrintGeneratedAnnotation(context_, printer, descriptor_, immutable_api_);
   printer->Print(
-      "public enum $classname$\n"
-      "    implements com.google.protobuf.ProtocolMessageEnum {\n",
-      "classname", descriptor_->name());
-  printer->Annotate("classname", descriptor_);
+    "public enum $classname$\n"
+    "    implements com.google.protobuf.ProtocolMessageEnum {\n",
+    "classname", descriptor_->name());
   printer->Indent();
 
   bool ordinal_is_index = true;
@@ -94,7 +103,7 @@ void EnumGenerator::Generate(io::Printer* printer) {
   }
 
   for (int i = 0; i < canonical_values_.size(); i++) {
-    std::map<string, string> vars;
+    map<string, string> vars;
     vars["name"] = canonical_values_[i]->name();
     vars["index"] = SimpleItoa(canonical_values_[i]->index());
     vars["number"] = SimpleItoa(canonical_values_[i]->number());
@@ -126,7 +135,7 @@ void EnumGenerator::Generate(io::Printer* printer) {
   // -----------------------------------------------------------------
 
   for (int i = 0; i < aliases_.size(); i++) {
-    std::map<string, string> vars;
+    map<string, string> vars;
     vars["classname"] = descriptor_->name();
     vars["name"] = aliases_[i].value->name();
     vars["canonical_name"] = aliases_[i].canonical_value->name();
@@ -136,7 +145,7 @@ void EnumGenerator::Generate(io::Printer* printer) {
   }
 
   for (int i = 0; i < descriptor_->value_count(); i++) {
-    std::map<string, string> vars;
+    map<string, string> vars;
     vars["name"] = descriptor_->value(i)->name();
     vars["number"] = SimpleItoa(descriptor_->value(i)->number());
     WriteEnumValueDocComment(printer, descriptor_->value(i));
@@ -232,14 +241,49 @@ void EnumGenerator::Generate(io::Printer* printer) {
     //   at module init time because it wouldn't work with descriptor.proto, but
     //   we can cache the value the first time getDescriptor() is called.
     if (descriptor_->containing_type() == NULL) {
-      // The class generated for the File fully populates the descriptor with
-      // extensions in both the mutable and immutable cases. (In the mutable api
-      // this is accomplished by attempting to load the immutable outer class).
-      printer->Print(
-        "  return $file$.getDescriptor().getEnumTypes().get($index$);\n",
-        "file", name_resolver_->GetClassName(descriptor_->file(),
-                                             immutable_api_),
-        "index", SimpleItoa(descriptor_->index()));
+      if (!MultipleJavaFiles(descriptor_->file(), immutable_api_)) {
+        printer->Print(
+          "  return $file$.getDescriptor().getEnumTypes().get($index$);\n",
+          "file", name_resolver_->GetClassName(descriptor_->file(),
+                                               immutable_api_),
+          "index", SimpleItoa(descriptor_->index()));
+      } else {
+        printer->Indent();
+        if (EnumHasCustomOptions(descriptor_)) {
+          // We need to load the immutable classes in order to parse custom
+          // options. However, since file level enums (no outer class) are
+          // shared by immutable code and mutable code, the immutable classes
+          // may not exist. So we try to use Java reflection to retrieve the
+          // descriptor from immutable classes.
+          printer->Print(
+            "try {\n"
+            "  java.lang.Class immutableFileClass =\n"
+            "      java.lang.Class.forName(\"$immutable_file_class_name$\");\n"
+            "  @java.lang.SuppressWarnings(\"unchecked\")\n"
+            "  java.lang.reflect.Method m =\n"
+            "      immutableFileClass.getMethod(\"getDescriptor\");\n"
+            "  com.google.protobuf.Descriptors.FileDescriptor file =\n"
+            "      (com.google.protobuf.Descriptors.FileDescriptor)\n"
+            "          m.invoke(immutableFileClass);\n"
+            "  return file.getEnumTypes().get($index$);\n"
+            "} catch (java.lang.Exception e) {\n"
+            // Immutable classes cannot be found. Proceed as if custom options
+            // don't exist.
+            "}\n",
+            "immutable_file_class_name",
+            name_resolver_->GetImmutableClassName(descriptor_->file()),
+            "index", SimpleItoa(descriptor_->index()));
+        }
+        printer->Print(
+          "return $immutable_package$.$descriptor_class$.$descriptor$\n"
+          "    .getEnumTypes().get($index$);\n",
+          "immutable_package", FileJavaPackage(descriptor_->file(), true),
+          "descriptor_class",
+          name_resolver_->GetDescriptorClassName(descriptor_->file()),
+          "descriptor", "getDescriptor()",
+          "index", SimpleItoa(descriptor_->index()));
+        printer->Outdent();
+      }
     } else {
       printer->Print(
           "  return $parent$.$descriptor$.getEnumTypes().get($index$);\n",