Update nano to serialize java keywords properly.

Change-Id: I7407d0fab609c336ecd73499e725aed0dd50f555

java/src/test/java/com/google/protobuf/NanoTest.java

@@ -2250,6 +2250,12 @@ public class NanoTest extends TestCase {
     assertEquals(message.d, newMessage.d);
   }
 
+  public void testJavaKeyword() throws Exception {
+    TestAllTypesNano msg = new TestAllTypesNano();
+    msg.synchronized_ = 123;
+    assertEquals(123, msg.synchronized_);
+  }
+
   private <T> List<T> list(T first, T... remaining) {
     List<T> list = new ArrayList<T>();
     list.add(first);

src/google/protobuf/compiler/javanano/javanano_enum.cc

@@ -82,7 +82,7 @@ void EnumGenerator::Generate(io::Printer* printer) {
   }
   for (int i = 0; i < canonical_values_.size(); i++) {
     map<string, string> vars;
-    vars["name"] = canonical_values_[i]->name();
+    vars["name"] = RenameJavaKeywords(canonical_values_[i]->name());
     vars["canonical_value"] = SimpleItoa(canonical_values_[i]->number());
     printer->Print(vars,
       "public static final int $name$ = $canonical_value$;\n");
@@ -92,7 +92,7 @@ void EnumGenerator::Generate(io::Printer* printer) {
 
   for (int i = 0; i < aliases_.size(); i++) {
     map<string, string> vars;
-    vars["name"] = aliases_[i].value->name();
+    vars["name"] = RenameJavaKeywords(aliases_[i].value->name());
     vars["canonical_name"] = aliases_[i].canonical_value->name();
     printer->Print(vars,
       "public static final int $name$ = $canonical_name$;\n");

src/google/protobuf/compiler/javanano/javanano_enum_field.cc

@@ -54,9 +54,9 @@ namespace {
 void SetEnumVariables(const Params& params,
     const FieldDescriptor* descriptor, map<string, string>* variables) {
   (*variables)["name"] =
-    UnderscoresToCamelCase(descriptor);
+    RenameJavaKeywords(UnderscoresToCamelCase(descriptor));
   (*variables)["capitalized_name"] =
-    UnderscoresToCapitalizedCamelCase(descriptor);
+    RenameJavaKeywords(UnderscoresToCapitalizedCamelCase(descriptor));
   (*variables)["number"] = SimpleItoa(descriptor->number());
   (*variables)["type"] = "int";
   (*variables)["default"] = DefaultValue(params, descriptor);

src/google/protobuf/compiler/javanano/javanano_extension.cc

@@ -45,7 +45,8 @@ using internal::WireFormat;
 
 void SetVariables(const FieldDescriptor* descriptor, const Params params,
                   map<string, string>* variables) {
-  (*variables)["name"] = UnderscoresToCamelCase(descriptor);
+  (*variables)["name"] = 
+    RenameJavaKeywords(UnderscoresToCamelCase(descriptor));
   (*variables)["number"] = SimpleItoa(descriptor->number());
   (*variables)["extends"] = ClassName(params, descriptor->containing_type());
 

src/google/protobuf/compiler/javanano/javanano_helpers.cc

@@ -37,6 +37,7 @@
 #include <google/protobuf/compiler/javanano/javanano_helpers.h>
 #include <google/protobuf/compiler/javanano/javanano_params.h>
 #include <google/protobuf/descriptor.pb.h>
+#include <google/protobuf/stubs/hash.h>
 #include <google/protobuf/stubs/strutil.h>
 #include <google/protobuf/stubs/substitute.h>
 
@@ -50,6 +51,48 @@ const char kThickSeparator[] =
 const char kThinSeparator[] =
   "// -------------------------------------------------------------------\n";
 
+class RenameKeywords {
+ private:
+  hash_set<string> java_keywords_set_;
+
+ public:
+  RenameKeywords() {
+    static const char* kJavaKeywordsList[] = {
+      // Reserved Java Keywords
+      "abstract", "assert", "boolean", "break", "byte", "case", "catch",
+      "char", "class", "const", "continue", "default", "do", "double", "else",
+      "enum", "extends", "final", "finally", "float", "for", "goto", "if",
+      "implements", "import", "instanceof", "int", "interface", "long",
+      "native", "new", "package", "private", "protected", "public", "return",
+      "short", "static", "strictfp", "super", "switch", "synchronized",
+      "this", "throw", "throws", "transient", "try", "void", "volatile", "while",
+
+      // Reserved Keywords for Literals
+      "false", "null", "true"
+    };
+
+    for (int i = 0; i < GOOGLE_ARRAYSIZE(kJavaKeywordsList); i++) {
+      java_keywords_set_.insert(kJavaKeywordsList[i]);
+    }
+  }
+
+  // Used to rename the a field name if it's a java keyword.  Specifically
+  // this is used to rename the ["name"] or ["capitalized_name"] field params.
+  // (http://docs.oracle.com/javase/tutorial/java/nutsandbolts/_keywords.html)
+  string RenameJavaKeywordsImpl(const string& input) {
+    string result = input;
+
+    if (java_keywords_set_.find(result) != java_keywords_set_.end()) {
+      result += "_";
+    }
+
+    return result;
+  }
+
+};
+
+static RenameKeywords sRenameKeywords;
+
 namespace {
 
 const char* kDefaultPackage = "";
@@ -110,6 +153,10 @@ string UnderscoresToCamelCase(const MethodDescriptor* method) {
   return UnderscoresToCamelCaseImpl(method->name(), false);
 }
 
+string RenameJavaKeywords(const string& input) {
+  return sRenameKeywords.RenameJavaKeywordsImpl(input);
+}
+
 string StripProto(const string& filename) {
   if (HasSuffixString(filename, ".protodevel")) {
     return StripSuffixString(filename, ".protodevel");

src/google/protobuf/compiler/javanano/javanano_helpers.h

@@ -55,6 +55,10 @@ extern const char kThinSeparator[];
 string UnderscoresToCamelCase(const FieldDescriptor* field);
 string UnderscoresToCapitalizedCamelCase(const FieldDescriptor* field);
 
+// Appends an "_" to the end of a field where the name is a reserved java
+// keyword.  For example int32 public = 1 will generate int public_.
+string RenameJavaKeywords(const string& input);
+
 // Similar, but for method names.  (Typically, this merely has the effect
 // of lower-casing the first letter of the name.)
 string UnderscoresToCamelCase(const MethodDescriptor* method);

src/google/protobuf/compiler/javanano/javanano_message.cc

@@ -396,12 +396,12 @@ void MessageGenerator::GenerateClear(io::Printer* printer) {
       // type.
       printer->Print(
         "$name$ = $default$.clone();\n",
-        "name", UnderscoresToCamelCase(field),
+        "name", RenameJavaKeywords(UnderscoresToCamelCase(field)),
         "default", DefaultValue(params_, field));
     } else {
       printer->Print(
         "$name$ = $default$;\n",
-        "name", UnderscoresToCamelCase(field),
+        "name", RenameJavaKeywords(UnderscoresToCamelCase(field)),
         "default", DefaultValue(params_, field));
     }
   }

src/google/protobuf/compiler/javanano/javanano_message_field.cc

@@ -56,9 +56,9 @@ namespace {
 void SetMessageVariables(const Params& params,
     const FieldDescriptor* descriptor, map<string, string>* variables) {
   (*variables)["name"] =
-    UnderscoresToCamelCase(descriptor);
+    RenameJavaKeywords(UnderscoresToCamelCase(descriptor));
   (*variables)["capitalized_name"] =
-    UnderscoresToCapitalizedCamelCase(descriptor);
+    RenameJavaKeywords(UnderscoresToCapitalizedCamelCase(descriptor));
   (*variables)["number"] = SimpleItoa(descriptor->number());
   (*variables)["type"] = ClassName(params, descriptor->message_type());
   (*variables)["group_or_message"] =

src/google/protobuf/compiler/javanano/javanano_primitive_field.cc

@@ -208,9 +208,9 @@ bool AllAscii(const string& text) {
 void SetPrimitiveVariables(const FieldDescriptor* descriptor, const Params params,
                            map<string, string>* variables) {
   (*variables)["name"] =
-    UnderscoresToCamelCase(descriptor);
+    RenameJavaKeywords(UnderscoresToCamelCase(descriptor));
   (*variables)["capitalized_name"] =
-    UnderscoresToCapitalizedCamelCase(descriptor);
+    RenameJavaKeywords(UnderscoresToCapitalizedCamelCase(descriptor));
   (*variables)["number"] = SimpleItoa(descriptor->number());
   (*variables)["type"] = PrimitiveTypeName(GetJavaType(descriptor));
   (*variables)["default"] = DefaultValue(params, descriptor);

src/google/protobuf/unittest_nano.proto

@@ -157,6 +157,9 @@ message TestAllTypesNano {
   optional int32 tag = 93;
   optional int32 get_serialized_size = 94;
   optional int32 write_to = 95;
+
+  // Try to fail with java reserved keywords
+  optional int32 synchronized = 96;
 }
 
 message ForeignMessageNano {