/compiler/as3/as3_message.cc

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Author: Robert Blackwood (ported from Kenton's)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#include <algorithm>
#include <google/protobuf/stubs/hash.h>
#include <google/protobuf/compiler/as3/as3_message.h>
#include <google/protobuf/compiler/as3/as3_enum.h>
#include <google/protobuf/compiler/as3/as3_extension.h>
#include <google/protobuf/compiler/as3/as3_helpers.h>
#include <google/protobuf/stubs/strutil.h>
#include <google/protobuf/io/printer.h>
#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/wire_format.h>
#include <google/protobuf/descriptor.pb.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace as3 {

using internal::WireFormat;

namespace {

const char* LabelName(FieldDescriptor::Label label) {
  switch (label) {
	case FieldDescriptor::LABEL_OPTIONAL		: return "LABEL_OPTIONAL";
	case FieldDescriptor::LABEL_REQUIRED		: return "LABEL_REQUIRED";
	case FieldDescriptor::LABEL_REPEATED		: return "LABEL_REPEATED";

  }		 
  GOOGLE_LOG(FATAL) << "Can't get here.";
  return NULL;
}

const char* AllCapsTypeName(FieldDescriptor::Type type) {
  switch (type) {

	case FieldDescriptor::TYPE_DOUBLE	: return "DOUBLE";
    case FieldDescriptor::TYPE_FLOAT	: return "FLOAT";          
    case FieldDescriptor::TYPE_INT64    : return "INT64";                       
    case FieldDescriptor::TYPE_UINT64   : return "UINT64";     
    case FieldDescriptor::TYPE_INT32    : return "INT32";             
    case FieldDescriptor::TYPE_FIXED64  : return "FIXED64";
    case FieldDescriptor::TYPE_FIXED32  : return "FIXED32";
    case FieldDescriptor::TYPE_BOOL		: return "BOOL";
    case FieldDescriptor::TYPE_STRING	: return "STRING";
    case FieldDescriptor::TYPE_GROUP	: return "GROUP";
    case FieldDescriptor::TYPE_MESSAGE	: return "MESSAGE";
    case FieldDescriptor::TYPE_BYTES	: return "BYTES";
    case FieldDescriptor::TYPE_UINT32	: return "UINT32";
    case FieldDescriptor::TYPE_ENUM		: return "ENUM";
    case FieldDescriptor::TYPE_SFIXED32	: return "SFIXED32";
    case FieldDescriptor::TYPE_SFIXED64	: return "SFIXED64";
    case FieldDescriptor::TYPE_SINT32	: return "SINT32";
    case FieldDescriptor::TYPE_SINT64	: return "SINT64";
  }		 
  GOOGLE_LOG(FATAL) << "Can't get here.";
  return NULL;
}

void PrintFieldComment(io::Printer* printer, const FieldDescriptor* field) {
  // Print the field's proto-syntax definition as a comment.  We don't want to
  // print group bodies so we cut off after the first line.
  string def = field->DebugString();
  printer->Print("// $def$\n",
    "def", def.substr(0, def.find_first_of('\n')));
}

struct FieldOrderingByNumber {
  inline bool operator()(const FieldDescriptor* a,
                         const FieldDescriptor* b) const {
    return a->number() < b->number();
  }
};

struct ExtensionRangeOrdering {
  bool operator()(const Descriptor::ExtensionRange* a,
                  const Descriptor::ExtensionRange* b) const {
    return a->start < b->start;
  }
};

// Sort the fields of the given Descriptor by number into a new[]'d array
// and return it.
const FieldDescriptor** SortFieldsByNumber(const Descriptor* descriptor) {
  const FieldDescriptor** fields =
    new const FieldDescriptor*[descriptor->field_count()];
  for (int i = 0; i < descriptor->field_count(); i++) {
    fields[i] = descriptor->field(i);
  }
  sort(fields, fields + descriptor->field_count(),
       FieldOrderingByNumber());
  return fields;
}

// Get an identifier that uniquely identifies this type within the file.
// This is used to declare static variables related to this type at the
// outermost file scope.
string UniqueFileScopeIdentifier(const Descriptor* descriptor) {
  return "static_" + StringReplace(descriptor->full_name(), ".", "_", true);
}

// Returns true if the message type has any required fields.  If it doesn't,
// we can optimize out calls to its isInitialized() method.
//
// already_seen is used to avoid checking the same type multiple times
// (and also to protect against recursion).
static bool HasRequiredFields(
    const Descriptor* type,
    hash_set<const Descriptor*>* already_seen) {
  if (already_seen->count(type) > 0) {
    // The type is already in cache.  This means that either:
    // a. The type has no required fields.
    // b. We are in the midst of checking if the type has required fields,
    //    somewhere up the stack.  In this case, we know that if the type
    //    has any required fields, they'll be found when we return to it,
    //    and the whole call to HasRequiredFields() will return true.
    //    Therefore, we don't have to check if this type has required fields
    //    here.
    return false;
  }
  already_seen->insert(type);

  // If the type has extensions, an extension with message type could contain
  // required fields, so we have to be conservative and assume such an
  // extension exists.
  if (type->extension_range_count() > 0) return true;

  for (int i = 0; i < type->field_count(); i++) {
    const FieldDescriptor* field = type->field(i);
    if (field->is_required()) {
      return true;
    }
    if (field->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) {
      if (HasRequiredFields(field->message_type(), already_seen)) {
        return true;
      }
    }
  }

  return false;
}

static bool HasRequiredFields(const Descriptor* type) {
  hash_set<const Descriptor*> already_seen;
  return HasRequiredFields(type, &already_seen);
}

}  // namespace

// ===================================================================

MessageGenerator::MessageGenerator(const Descriptor* descriptor)
  : descriptor_(descriptor),
    field_generators_(descriptor) {
}

MessageGenerator::~MessageGenerator() {}

void MessageGenerator::GenerateStaticVariables(io::Printer* printer) {
  // Because descriptor.proto (com.google.protobuf.DescriptorProtos) is
  // used in the construction of descriptors, we have a tricky bootstrapping
  // problem.  To help control static initialization order, we make sure all
  // descriptors and other static data that depends on them are members of
  // the outermost class in the file.  This way, they will be initialized in
  // a deterministic order.

  map<string, string> vars;
  vars["identifier"] = UniqueFileScopeIdentifier(descriptor_);
  vars["index"] = SimpleItoa(descriptor_->index());
  vars["classname"] = ClassName(descriptor_);
  if (descriptor_->containing_type() != NULL) {
    vars["parent"] = UniqueFileScopeIdentifier(descriptor_->containing_type());
  }
  if (descriptor_->file()->options().java_multiple_files()) {
    // We can only make these package-private since the classes that use them
    // are in separate files.
    vars["private"] = "";
  } else {
    vars["private"] = "private ";
  }

  // The descriptor for this type.
  if (descriptor_->containing_type() == NULL) {
    printer->Print(vars,
	  "$private$static final internal_$identifier$_descriptor:com.google.protobuf.Descriptors.Descriptor =\n"
      "    getDescriptor().getMessageTypes().get($index$);\n");
  } else {
    printer->Print(vars,
		"$private$static final internal_$identifier$_descriptor:com.google.protobuf.Descriptors.Descriptor =\n"
      "    internal_$parent$_descriptor.getNestedTypes().get($index$);\n");
  }

  // And the FieldAccessorTable.
  printer->Print(vars,
    "$private$static\n"
	"    internal_$identifier$_fieldAccessorTable:com.google.protobuf.GeneratedMessage.FieldAccessorTable = new\n"
    "      com.google.protobuf.GeneratedMessage.FieldAccessorTable(\n"
    "        internal_$identifier$_descriptor,\n"
    "        new String[] { ");
  for (int i = 0; i < descriptor_->field_count(); i++) {
    printer->Print(
      "\"$field_name$\", ",
      "field_name",
        UnderscoresToCapitalizedCamelCase(descriptor_->field(i)));
  }
  printer->Print("},\n"
    "        $classname$.class,\n"
    "        $classname$.Builder.class);\n",
    "classname", ClassName(descriptor_));

  // Generate static members for all nested types.
  for (int i = 0; i < descriptor_->nested_type_count(); i++) {
    // TODO(kenton):  Reuse MessageGenerator objects?
    MessageGenerator(descriptor_->nested_type(i))
      .GenerateStaticVariables(printer);
  }
}

void MessageGenerator::Generate(io::Printer* printer) {
  bool is_own_file =
    descriptor_->containing_type() == NULL &&
    descriptor_->file()->options().java_multiple_files();

	
	printer->Print("import com.google.protobuf.*;\n");
	printer->Print("import flash.utils.*;\n");
	printer->Print("import com.hurlant.math.BigInteger;\n");
	
	for (int i = 0; i < descriptor_->field_count(); i++) {
		if (descriptor_->field(i)->type() == FieldDescriptor::TYPE_MESSAGE) {
			
		  string p = descriptor_->field(i)->message_type()->file()->options().java_package();
		  if(!p.empty()) {
		    p = p.append(".");
		  }		
		  printer->Print("import $package$$messagetype$;\n"
		  				,"package", p
						,"messagetype", descriptor_->field(i)->message_type()->name());	
		}
	}
	
	printer->Print("public final class $classname$ extends Message {\n",
				   "classname", descriptor_->name());
  
	printer->Indent();
			
	printer->Print("public function $classname$() {\n",
				   "classname", descriptor_->name());

  printer->Indent();
  for (int i = 0; i < descriptor_->field_count(); i++) {
	  printer->Print("registerField(\"$name$\",", "name", UnderscoresToCamelCase(descriptor_->field(i)));
	  if (descriptor_->field(i)->type() == FieldDescriptor::TYPE_MESSAGE) {
		  
		string p = descriptor_->field(i)->message_type()->file()->options().java_package();
		if(!p.empty()) {
			p = p.append(".");
		}		
		  
	    printer->Print("\"$package$$messagetype$\","
						 ,"package",p
						 ,"messagetype", descriptor_->field(i)->message_type()->name());
	  } else {
		  printer->Print("\"\",");
	  }
	  printer->Print("Descriptor.$type$,", "type", AllCapsTypeName(descriptor_->field(i)->type()));
	  printer->Print("Descriptor.$label$,", "label", LabelName(descriptor_->field(i)->label()));
	  printer->Print("$fieldNum$);", "fieldNum", SimpleItoa(descriptor_->field(i)->number()));
	  printer->Print("\n");
  }
  printer->Outdent();
  printer->Print("}\n");

 // printer->Print(
 //   "\n"
	//"private static final var defaultInstance:$classname$ = new $classname$();\n"
	//"public static function getDefaultInstance():$classname$ {\n"
 //   "  return defaultInstance;\n"
 //   "}\n"
 //   "\n"
	//"public function getDefaultInstanceForType():$classname$ {\n"
 //   "  return defaultInstance;\n"
 //   "}\n"
 //   "\n",
 //   "classname", descriptor_->name());

  //printer->Print(
	  //"public static final function getDescriptor():com.google.protobuf.Descriptors.Descriptor {\n"
   // "  return $fileclass$.internal_$identifier$_descriptor;\n"
   // "}\n"
 //   "\n"
	//"protected function internalGetFieldAccessorTable():com.google.protobuf.GeneratedMessage.FieldAccessorTable {\n"
 //   "  return $fileclass$.internal_$identifier$_fieldAccessorTable;\n"
 //   "}\n"
 //   "\n",
 //   "fileclass", ClassName(descriptor_->file()),
 //   "identifier", UniqueFileScopeIdentifier(descriptor_));

  // Nested types and extensions
  //for (int i = 0; i < descriptor_->enum_type_count(); i++) {
  //  EnumGenerator(descriptor_->enum_type(i)).Generate(printer);
  //}

  //for (int i = 0; i < descriptor_->nested_type_count(); i++) {
  //  MessageGenerator(descriptor_->nested_type(i)).Generate(printer);
  //}

  //for (int i = 0; i < descriptor_->extension_count(); i++) {
  //  ExtensionGenerator(descriptor_->extension(i)).Generate(printer);
  //}

  // Fields
  for (int i = 0; i < descriptor_->field_count(); i++) {
    PrintFieldComment(printer, descriptor_->field(i));
    field_generators_.get(descriptor_->field(i)).GenerateMembers(printer);
    printer->Print("\n");
  }

	//not supported for now - [Philippe Pascal (Sorrydevil) Oct15th 2009 - protobuf-actionscript3 project]
  //if (descriptor_->file()->options().optimize_for() == FileOptions::SPEED) {
//    GenerateIsInitialized(printer);
//    GenerateMessageSerializationMethods(printer);
//  }
	//not supported for now -- EOB

  //GenerateParseFromMethods(printer);
  //GenerateBuilder(printer);
	
	printer->Outdent();
	printer->Print("\n}");	
}

// ===================================================================

void MessageGenerator::
GenerateMessageSerializationMethods(io::Printer* printer) {
  scoped_array<const FieldDescriptor*> sorted_fields(
    SortFieldsByNumber(descriptor_));

  vector<const Descriptor::ExtensionRange*> sorted_extensions;
  for (int i = 0; i < descriptor_->extension_range_count(); ++i) {
    sorted_extensions.push_back(descriptor_->extension_range(i));
  }
  sort(sorted_extensions.begin(), sorted_extensions.end(),
       ExtensionRangeOrdering());

  printer->Print(
    "public function writeTo(output:com.google.protobuf.CodedOutputStream) : void\n"
    "{\n");
  printer->Indent();

  if (descriptor_->extension_range_count() > 0) {
    printer->Print(
      "com.google.protobuf.GeneratedMessage.ExtendableMessage"
      ".ExtensionWriter extensionWriter = new ExtensionWriter();\n");
  }

  // Merge the fields and the extension ranges, both sorted by field number.
  for (int i = 0, j = 0;
       i < descriptor_->field_count() || j < sorted_extensions.size();
       ) {
    if (i == descriptor_->field_count()) {
      GenerateSerializeOneExtensionRange(printer, sorted_extensions[j++]);
    } else if (j == sorted_extensions.size()) {
      GenerateSerializeOneField(printer, sorted_fields[i++]);
    } else if (sorted_fields[i]->number() < sorted_extensions[j]->start) {
      GenerateSerializeOneField(printer, sorted_fields[i++]);
    } else {
      GenerateSerializeOneExtensionRange(printer, sorted_extensions[j++]);
    }
  }

  if (descriptor_->options().message_set_wire_format()) {
    printer->Print(
      "getUnknownFields().writeAsMessageSetTo(output);\n");
  } else {
    printer->Print(
      "getUnknownFields().writeTo(output);\n");
  }

  printer->Outdent();
  printer->Print(
    "}\n"
    "\n"
	"private memoizedSerializedSize:int = -1;\n"
	"public getSerializedSize():int {\n"
	"  var size:int = memoizedSerializedSize;\n"
    "  if (size != -1) return size;\n"
    "\n"
    "  size = 0;\n");
  printer->Indent();

  for (int i = 0; i < descriptor_->field_count(); i++) {
    field_generators_.get(sorted_fields[i]).GenerateSerializedSizeCode(printer);
  }

  if (descriptor_->extension_range_count() > 0) {
    printer->Print(
      "size += extensionsSerializedSize();\n");
  }

  if (descriptor_->options().message_set_wire_format()) {
    printer->Print(
      "size += getUnknownFields().getSerializedSizeAsMessageSet();\n");
  } else {
    printer->Print(
      "size += getUnknownFields().getSerializedSize();\n");
  }

  printer->Outdent();
  printer->Print(
    "  memoizedSerializedSize = size;\n"
    "  return size;\n"
    "}\n"
    "\n");
}

void MessageGenerator::
GenerateParseFromMethods(io::Printer* printer) {
  // Note:  These are separate from GenerateMessageSerializationMethods()
  //   because they need to be generated even for messages that are optimized
  //   for code size.
 // printer->Print(
 //   "/*\n"
	//"public static function parseFrom(\n"
	//"    data:ByteArray):$classname$ \n"
 //   "{\n"
 //   "  return mergeFrom(data).buildParsed();\n"
 //   "}\n"
 //   "public static function parseFrom(\n"
 //   "    data:ByteArray,\n"
	//"    extensionRegistry:com.google.protobuf.ExtensionRegistry ):$classname$ \n"
 //   "{\n"
 //   "  return mergeFrom(data, extensionRegistry)\n"
 //   "           .buildParsed();\n"
 //   "}\n"
	//"public static function parseFrom(input:InputStream):$classname$ \n"
 //   "{\n"
 //   "  return mergeFrom(input).buildParsed();\n"
 //   "}\n"
 //   "public static function parseFrom(\n"
	//"    input:IDataInput,\n"
	//"    extensionRegistry:com.google.protobuf.ExtensionRegistry):$classname$ \n"
 //   "{\n"
 //   "  return newBuilder().mergeFrom(input, extensionRegistry)\n"
 //   "           .buildParsed();\n"
 //   "}\n"
 //   "public static function parseFrom(\n"
	//"    input:com.google.protobuf.CodedInputStream):$classname$\n"
 //   "{\n"
 //   "  return newBuilder().mergeFrom(input).buildParsed();\n"
 //   "}\n"
	//"public static function parseFrom(\n"
	//"    input:com.google.protobuf.CodedInputStream,\n"
 //   "    extensionRegistry:com.google.protobuf.ExtensionRegistry):$classname$\n"
 //   "{\n"
 //   "  return newBuilder().mergeFrom(input, extensionRegistry)\n"
 //   "           .buildParsed();\n"
 //   "}\n"
 //   "\n  */",
 //   "classname", descriptor_->name());
}

void MessageGenerator::GenerateSerializeOneField(
    io::Printer* printer, const FieldDescriptor* field) {
  field_generators_.get(field).GenerateSerializationCode(printer);
}

void MessageGenerator::GenerateSerializeOneExtensionRange(
    io::Printer* printer, const Descriptor::ExtensionRange* range) {
  printer->Print(
    "extensionWriter.writeUntil($end$, output);\n",
    "end", SimpleItoa(range->end));
}

// ===================================================================

void MessageGenerator::GenerateBuilder(io::Printer* printer) {

  GenerateCommonBuilderMethods(printer);

  if (descriptor_->file()->options().optimize_for() == FileOptions::SPEED) {
    GenerateBuilderParsingMethods(printer);
  }

  for (int i = 0; i < descriptor_->field_count(); i++) {
    printer->Print("\n");
    PrintFieldComment(printer, descriptor_->field(i));
    field_generators_.get(descriptor_->field(i))
                     .GenerateBuilderMembers(printer);
  }

  printer->Outdent();
  printer->Print("}\n\n");
}

// ===================================================================

void MessageGenerator::GenerateCommonBuilderMethods(io::Printer* printer) {
  printer->Print(
	"\n\n"
	//"private var result:Object = {};\n"
    //"\n"
	//"protected function internalGetResult():Object {\n"
    //"  return result;\n"
    //"}\n"
    //"\n"
	//"public function clear():$classname$ {\n"
	//"  result = {};\n"
    //"  return this;\n"
    //"}\n"
    //"\n"
	//"public function clone():$classname$ {\n"
    //"  return new Builder().mergeFrom(result);\n"
    //"}\n"
    //"\n"
	"public function getDescriptors():Array {\n"
    "  return fieldDescriptors;\n"
    "}\n"
    "\n"
	"public static function getDefaultInstance():$classname$ {\n"
	"  return new $classname$();\n"
    "}\n"
    "\n",
	"classname", descriptor_->name());

  // -----------------------------------------------------------------

 // printer->Print(
	//  "public function build():Object {\n"
 //   "  if (!isInitialized()) {\n"
 //   "    throw new com.google.protobuf.UninitializedMessageException(\n"
 //   "      result);\n"
 //   "  }\n"
 //   "  return buildPartial();\n"
 //   "}\n"
 //   "\n"
	//"private function buildParsed():Object\n"
 //   "{\n"
 //   "  if (!isInitialized()) {\n"
 //   "    throw new com.google.protobuf.UninitializedMessageException(\n"
 //   "      result).asInvalidProtocolBufferException();\n"
 //   "  }\n"
 //   "  return buildPartial();\n"
 //   "}\n"
	//"\n"
	//"private function buildPartial():Object\n"
 //   "{\n"
 //   "  if (!isInitialized()) {\n"
 //   "    throw new com.google.protobuf.UninitializedMessageException(\n"
 //   "      result).asInvalidProtocolBufferException();\n"
 //   "  }\n"
 //   "  return result;\n"
 //   "}\n"
	//"public function buildPartial():$classname$ {\n",
 //   "classname", ClassName(descriptor_));
  //printer->Indent();

  //for (int i = 0; i < descriptor_->field_count(); i++) {
  //  field_generators_.get(descriptor_->field(i)).GenerateBuildingCode(printer);
  //}

  //printer->Outdent();
  //printer->Print(
	 // "  var returnMe:$classname$ = result;\n"
  //  "  result = null;\n"
  //  "  return returnMe;\n"
  //  "}\n"
  //  "\n",
  //  "classname", ClassName(descriptor_));

  // -----------------------------------------------------------------

 // if (descriptor_->file()->options().optimize_for() == FileOptions::SPEED) {
 //   printer->Print(
	//	"public function mergeFrom(com.google.protobuf.Message other):Builder {\n"
 //     "  if (other instanceof $classname$) {\n"
 //     "    return mergeFrom(($classname$)other);\n"
 //     "  } else {\n"
 //     "    super.mergeFrom(other);\n"
 //     "    return this;\n"
 //     "  }\n"
 //     "}\n"
 //     "\n"
	//  "public function mergeFrom($classname$ other):Builder {\n"
 //     // Optimization:  If other is the default instance, we know none of its
 //     //   fields are set so we can skip the merge.
 //     "  if (other == $classname$.getDefaultInstance()) return this;\n",
 //     "classname", ClassName(descriptor_));
 //   printer->Indent();

 //   for (int i = 0; i < descriptor_->field_count(); i++) {
 //     field_generators_.get(descriptor_->field(i)).GenerateMergingCode(printer);
	//}

 //   printer->Outdent();
 //   printer->Print(
 //     "  this.mergeUnknownFields(other.getUnknownFields());\n"
 //     "  return this;\n"
 //     "}\n"
 //     "\n");
 // }
}

// ===================================================================

void MessageGenerator::GenerateBuilderParsingMethods(io::Printer* printer) {
  scoped_array<const FieldDescriptor*> sorted_fields(
    SortFieldsByNumber(descriptor_));

  printer->Print(
    "public function mergeFrom(\n"
	"    com.google.protobuf.CodedInputStream input):Builder\n"
    "{\n"
    "  return mergeFrom(input,\n"
    "    com.google.protobuf.ExtensionRegistry.getEmptyRegistry());\n"
    "}\n"
    "\n"
    "public function mergeFrom(\n"
    "    com.google.protobuf.CodedInputStream input,\n"
	"    extensionRegistry:com.google.protobuf.ExtensionRegistry ):Builder\n"
    "{\n");
  printer->Indent();

  printer->Print(
    "com.google.protobuf.UnknownFieldSet.Builder unknownFields =\n"
    "  com.google.protobuf.UnknownFieldSet.newBuilder(\n"
    "    this.getUnknownFields());\n"
    "while (true) {\n");
  printer->Indent();

  printer->Print(
    "int tag = input.readTag();\n"
    "switch (tag) {\n");
  printer->Indent();

  printer->Print(
    "case 0:\n"          // zero signals EOF / limit reached
    "  this.setUnknownFields(unknownFields.build());\n"
    "  return this;\n"
    "default: {\n"
    "  if (!parseUnknownField(input, unknownFields,\n"
    "                         extensionRegistry, tag)) {\n"
    "    this.setUnknownFields(unknownFields.build());\n"
    "    return this;\n"   // it's an endgroup tag
    "  }\n"
    "  break;\n"
    "}\n");

  for (int i = 0; i < descriptor_->field_count(); i++) {
    const FieldDescriptor* field = sorted_fields[i];
   uint32 tag = WireFormat::MakeTag(field);

    printer->Print(
      "case $tag$: {\n",
      "tag", SimpleItoa(tag));
    printer->Indent();

    field_generators_.get(field).GenerateParsingCode(printer);

    printer->Outdent();
    printer->Print(
      "  break;\n"
      "}\n");
  }

  printer->Outdent();
  printer->Outdent();
  printer->Outdent();
  printer->Print(
    "    }\n"     // switch (tag)
    "  }\n"       // while (true)
    "}\n"
    "\n");
}

// ===================================================================

void MessageGenerator::GenerateIsInitialized(io::Printer* printer) {
  printer->Print(
	  "public final function isInitialized():Boolean {\n");
  printer->Indent();

  // Check that all required fields in this message are set.
  // TODO(kenton):  We can optimize this when we switch to putting all the
  //   "has" fields into a single bitfield.
  for (int i = 0; i < descriptor_->field_count(); i++) {
    const FieldDescriptor* field = descriptor_->field(i);

    if (field->is_required()) {
      printer->Print(
        "if (!has$name$) return false;\n",
        "name", UnderscoresToCapitalizedCamelCase(field));
    }
  }

  // Now check that all embedded messages are initialized.
  for (int i = 0; i < descriptor_->field_count(); i++) {
    const FieldDescriptor* field = descriptor_->field(i);
    if (field->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE &&
        HasRequiredFields(field->message_type())) {
      switch (field->label()) {
        case FieldDescriptor::LABEL_REQUIRED:
          printer->Print(
            "if (!get$name$().isInitialized()) return false;\n",
            "type", ClassName(field->message_type()),
            "name", UnderscoresToCapitalizedCamelCase(field));
          break;
        case FieldDescriptor::LABEL_OPTIONAL:
          printer->Print(
            "if (has$name$()) {\n"
            "  if (!get$name$().isInitialized()) return false;\n"
            "}\n",
            "type", ClassName(field->message_type()),
            "name", UnderscoresToCapitalizedCamelCase(field));
          break;
        case FieldDescriptor::LABEL_REPEATED:
          printer->Print(
            "for (var element:$type$ in get$name$List()) {\n"
            "  if (!element.isInitialized()) return false;\n"
            "}\n",
            "type", ClassName(field->message_type()),
            "name", UnderscoresToCapitalizedCamelCase(field));
          break;
      }
    }
  }

  if (descriptor_->extension_range_count() > 0) {
    printer->Print(
      "if (!extensionsAreInitialized()) return false;\n");
  }

  printer->Outdent();
  printer->Print(
    "  return true;\n"
    "}\n"
    "\n");
}

}  // namespace as3
}  // namespace compiler
}  // namespace protobuf
}  // namespace google