text:
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Author: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#include <map>
#include <string>

#include <google/protobuf/compiler/javanano/javanano_enum_field.h>
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/compiler/javanano/javanano_helpers.h>
#include <google/protobuf/io/printer.h>
#include <google/protobuf/wire_format.h>
#include <google/protobuf/stubs/strutil.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace javanano {

namespace {

// TODO(kenton):  Factor out a "SetCommonFieldVariables()" to get rid of
//   repeat code between this and the other field types.
void SetEnumVariables(const Params& params,
    const FieldDescriptor* descriptor, std::map<string, string>* variables) {
  (*variables)["name"] =
    RenameJavaKeywords(UnderscoresToCamelCase(descriptor));
  (*variables)["capitalized_name"] =
    RenameJavaKeywords(UnderscoresToCapitalizedCamelCase(descriptor));
  (*variables)["number"] = SimpleItoa(descriptor->number());
  if (params.use_reference_types_for_primitives()
      && !params.reftypes_primitive_enums()
      && !descriptor->is_repeated()) {
    (*variables)["type"] = "java.lang.Integer";
    (*variables)["default"] = "null";
  } else {
    (*variables)["type"] = "int";
    (*variables)["default"] = DefaultValue(params, descriptor);
  }
  (*variables)["repeated_default"] =
      "com.google.protobuf.nano.WireFormatNano.EMPTY_INT_ARRAY";
  (*variables)["tag"] = SimpleItoa(internal::WireFormat::MakeTag(descriptor));
  (*variables)["tag_size"] = SimpleItoa(
      internal::WireFormat::TagSize(descriptor->number(), descriptor->type()));
  (*variables)["non_packed_tag"] = SimpleItoa(
      internal::WireFormatLite::MakeTag(descriptor->number(),
          internal::WireFormat::WireTypeForFieldType(descriptor->type())));
  (*variables)["message_name"] = descriptor->containing_type()->name();
  const EnumDescriptor* enum_type = descriptor->enum_type();
  (*variables)["message_type_intdef"] = "@"
      + ToJavaName(params, enum_type->name(), true,
          enum_type->containing_type(), enum_type->file());
}

void LoadEnumValues(const Params& params,
    const EnumDescriptor* enum_descriptor, vector<string>* canonical_values) {
  string enum_class_name = ClassName(params, enum_descriptor);
  for (int i = 0; i < enum_descriptor->value_count(); i++) {
    const EnumValueDescriptor* value = enum_descriptor->value(i);
    const EnumValueDescriptor* canonical_value =
        enum_descriptor->FindValueByNumber(value->number());
    if (value == canonical_value) {
      canonical_values->push_back(
          enum_class_name + "." + RenameJavaKeywords(value->name()));
    }
  }
}

void PrintCaseLabels(
    io::Printer* printer, const vector<string>& canonical_values) {
  for (int i = 0; i < canonical_values.size(); i++) {
    printer->Print(
      "  case $value$:\n",
      "value", canonical_values[i]);
  }
}

}  // namespace

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

EnumFieldGenerator::
EnumFieldGenerator(const FieldDescriptor* descriptor, const Params& params)
  : FieldGenerator(params), descriptor_(descriptor) {
  SetEnumVariables(params, descriptor, &variables_);
  LoadEnumValues(params, descriptor->enum_type(), &canonical_values_);
}

EnumFieldGenerator::~EnumFieldGenerator() {}

void EnumFieldGenerator::
GenerateMembers(io::Printer* printer, bool /* unused lazy_init */) const {
  if (params_.generate_intdefs()) {
    printer->Print(variables_, "$message_type_intdef$\n");
  }
  printer->Print(variables_, "public $type$ $name$;\n");

  if (params_.generate_has()) {
    printer->Print(variables_,
      "public boolean has$capitalized_name$;\n");
  }
}

void EnumFieldGenerator::
GenerateClearCode(io::Printer* printer) const {
  printer->Print(variables_,
    "$name$ = $default$;\n");

  if (params_.generate_has()) {
    printer->Print(variables_,
      "has$capitalized_name$ = false;\n");
  }
}

void EnumFieldGenerator::
GenerateMergingCode(io::Printer* printer) const {
  printer->Print(variables_,
    "int value = input.readInt32();\n"
    "switch (value) {\n");
  PrintCaseLabels(printer, canonical_values_);
  printer->Print(variables_,
    "    this.$name$ = value;\n");
  if (params_.generate_has()) {
    printer->Print(variables_,
      "    has$capitalized_name$ = true;\n");
  }
  printer->Print(
    "    break;\n"
    "}\n");
  // No default case: in case of invalid value from the wire, preserve old
  // field value. Also we are not storing the invalid value into the unknown
  // fields, because there is no way to get the value out.
}

void EnumFieldGenerator::
GenerateSerializationCode(io::Printer* printer) const {
  if (descriptor_->is_required() && !params_.generate_has()) {
    // Always serialize a required field if we don't have the 'has' signal.
    printer->Print(variables_,
      "output.writeInt32($number$, this.$name$);\n");
  } else {
    if (params_.generate_has()) {
      printer->Print(variables_,
        "if (this.$name$ != $default$ || has$capitalized_name$) {\n");
    } else {
      printer->Print(variables_,
        "if (this.$name$ != $default$) {\n");
    }
    printer->Print(variables_,
      "  output.writeInt32($number$, this.$name$);\n"
      "}\n");
  }
}

void EnumFieldGenerator::
GenerateSerializedSizeCode(io::Printer* printer) const {
  if (descriptor_->is_required() && !params_.generate_has()) {
    printer->Print(variables_,
      "size += com.google.protobuf.nano.CodedOutputByteBufferNano\n"
      "  .computeInt32Size($number$, this.$name$);\n");
  } else {
    if (params_.generate_has()) {
      printer->Print(variables_,
        "if (this.$name$ != $default$ || has$capitalized_name$) {\n");
    } else {
      printer->Print(variables_,
        "if (this.$name$ != $default$) {\n");
    }
    printer->Print(variables_,
      "  size += com.google.protobuf.nano.CodedOutputByteBufferNano\n"
      "    .computeInt32Size($number$, this.$name$);\n"
      "}\n");
  }
}

void EnumFieldGenerator::GenerateEqualsCode(io::Printer* printer) const {
  if (params_.use_reference_types_for_primitives()
        && !params_.reftypes_primitive_enums()) {
    printer->Print(variables_,
      "if (this.$name$ == null) {\n"
      "  if (other.$name$ != null) {\n"
      "    return false;\n"
      "  }\n"
      "} else if (!this.$name$.equals(other.$name$)) {\n"
      "  return false;"
      "}\n");
  } else {
    // We define equality as serialized form equality. If generate_has(),
    // then if the field value equals the default value in both messages,
    // but one's 'has' field is set and the other's is not, the serialized
    // forms are different and we should return false.
    printer->Print(variables_,
      "if (this.$name$ != other.$name$");
    if (params_.generate_has()) {
      printer->Print(variables_,
        "\n"
        "    || (this.$name$ == $default$\n"
        "        && this.has$capitalized_name$ != other.has$capitalized_name$)");
    }
    printer->Print(") {\n"
      "  return false;\n"
      "}\n");
  }
}

void EnumFieldGenerator::GenerateHashCodeCode(io::Printer* printer) const {
  printer->Print(
    "result = 31 * result + ");
  if (params_.use_reference_types_for_primitives()
        && !params_.reftypes_primitive_enums()) {
    printer->Print(variables_,
      "(this.$name$ == null ? 0 : this.$name$)");
  } else {
    printer->Print(variables_,
      "this.$name$");
  }
  printer->Print(";\n");
}

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

AccessorEnumFieldGenerator::
AccessorEnumFieldGenerator(const FieldDescriptor* descriptor,
    const Params& params, int has_bit_index)
  : FieldGenerator(params), descriptor_(descriptor) {
  SetEnumVariables(params, descriptor, &variables_);
  LoadEnumValues(params, descriptor->enum_type(), &canonical_values_);
  SetBitOperationVariables("has", has_bit_index, &variables_);
}

AccessorEnumFieldGenerator::~AccessorEnumFieldGenerator() {}

void AccessorEnumFieldGenerator::
GenerateMembers(io::Printer* printer, bool /* unused lazy_init */) const {
  printer->Print(variables_, "private int $name$_;\n");
  if (params_.generate_intdefs()) {
    printer->Print(variables_, "$message_type_intdef$\n");
  }
  printer->Print(variables_,
    "public int get$capitalized_name$() {\n"
    "  return $name$_;\n"
    "}\n"
    "public $message_name$ set$capitalized_name$(");
  if (params_.generate_intdefs()) {
    printer->Print(variables_,
      "\n"
      "    $message_type_intdef$ ");
  }
  printer->Print(variables_,
    "int value) {\n"
    "  $name$_ = value;\n"
    "  $set_has$;\n"
    "  return this;\n"
    "}\n"
    "public boolean has$capitalized_name$() {\n"
    "  return $get_has$;\n"
    "}\n"
    "public $message_name$ clear$capitalized_name$() {\n"
    "  $name$_ = $default$;\n"
    "  $clear_has$;\n"
    "  return this;\n"
    "}\n");
}

void AccessorEnumFieldGenerator::
GenerateClearCode(io::Printer* printer) const {
  printer->Print(variables_,
    "$name$_ = $default$;\n");
}

void AccessorEnumFieldGenerator::
GenerateMergingCode(io::Printer* printer) const {
  printer->Print(variables_,
    "int value = input.readInt32();\n"
    "switch (value) {\n");
  PrintCaseLabels(printer, canonical_values_);
  printer->Print(variables_,
    "    $name$_ = value;\n"
    "    $set_has$;\n"
    "    break;\n"
    "}\n");
  // No default case: in case of invalid value from the wire, preserve old
  // field value. Also we are not storing the invalid value into the unknown
  // fields, because there is no way to get the value out.
}

void AccessorEnumFieldGenerator::
GenerateSerializationCode(io::Printer* printer) const {
  printer->Print(variables_,
    "if ($get_has$) {\n"
    "  output.writeInt32($number$, $name$_);\n"
    "}\n");
}

void AccessorEnumFieldGenerator::
GenerateSerializedSizeCode(io::Printer* printer) const {
  printer->Print(variables_,
    "if ($get_has$) {\n"
    "  size += com.google.protobuf.nano.CodedOutputByteBufferNano\n"
    "    .computeInt32Size($number$, $name$_);\n"
    "}\n");
}

void AccessorEnumFieldGenerator::
GenerateEqualsCode(io::Printer* printer) const {
  printer->Print(variables_,
    "if ($different_has$\n"
    "    || $name$_ != other.$name$_) {\n"
    "  return false;\n"
    "}\n");
}

void AccessorEnumFieldGenerator::
GenerateHashCodeCode(io::Printer* printer) const {
  printer->Print(variables_,
    "result = 31 * result + $name$_;\n");
}

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

RepeatedEnumFieldGenerator::
RepeatedEnumFieldGenerator(const FieldDescriptor* descriptor, const Params& params)
  : FieldGenerator(params), descriptor_(descriptor) {
  SetEnumVariables(params, descriptor, &variables_);
  LoadEnumValues(params, descriptor->enum_type(), &canonical_values_);
}

RepeatedEnumFieldGenerator::~RepeatedEnumFieldGenerator() {}

void RepeatedEnumFieldGenerator::
GenerateMembers(io::Printer* printer, bool /* unused lazy_init */) const {
  printer->Print(variables_,
    "public $type$[] $name$;\n");
}

void RepeatedEnumFieldGenerator::
GenerateClearCode(io::Printer* printer) const {
  printer->Print(variables_,
    "$name$ = $repeated_default$;\n");
}

void RepeatedEnumFieldGenerator::
GenerateMergingCode(io::Printer* printer) const {
  // First, figure out the maximum length of the array, then parse,
  // and finally copy the valid values to the field.
  printer->Print(variables_,
    "int length = com.google.protobuf.nano.WireFormatNano\n"
    "    .getRepeatedFieldArrayLength(input, $non_packed_tag$);\n"
    "int[] validValues = new int[length];\n"
    "int validCount = 0;\n"
    "for (int i = 0; i < length; i++) {\n"
    "  if (i != 0) { // tag for first value already consumed.\n"
    "    input.readTag();\n"
    "  }\n"
    "  int value = input.readInt32();\n"
    "  switch (value) {\n");
  printer->Indent();
  PrintCaseLabels(printer, canonical_values_);
  printer->Outdent();
  printer->Print(variables_,
    "      validValues[validCount++] = value;\n"
    "      break;\n"
    "  }\n"
    "}\n"
    "if (validCount != 0) {\n"
    "  int i = this.$name$ == null ? 0 : this.$name$.length;\n"
    "  if (i == 0 && validCount == validValues.length) {\n"
    "    this.$name$ = validValues;\n"
    "  } else {\n"
    "    int[] newArray = new int[i + validCount];\n"
    "    if (i != 0) {\n"
    "      java.lang.System.arraycopy(this.$name$, 0, newArray, 0, i);\n"
    "    }\n"
    "    java.lang.System.arraycopy(validValues, 0, newArray, i, validCount);\n"
    "    this.$name$ = newArray;\n"
    "  }\n"
    "}\n");
}

void RepeatedEnumFieldGenerator::
GenerateMergingCodeFromPacked(io::Printer* printer) const {
  printer->Print(variables_,
    "int bytes = input.readRawVarint32();\n"
    "int limit = input.pushLimit(bytes);\n"
    "// First pass to compute array length.\n"
    "int arrayLength = 0;\n"
    "int startPos = input.getPosition();\n"
    "while (input.getBytesUntilLimit() > 0) {\n"
    "  switch (input.readInt32()) {\n");
  printer->Indent();
  PrintCaseLabels(printer, canonical_values_);
  printer->Outdent();
  printer->Print(variables_,
    "      arrayLength++;\n"
    "      break;\n"
    "  }\n"
    "}\n"
    "if (arrayLength != 0) {\n"
    "  input.rewindToPosition(startPos);\n"
    "  int i = this.$name$ == null ? 0 : this.$name$.length;\n"
    "  int[] newArray = new int[i + arrayLength];\n"
    "  if (i != 0) {\n"
    "    java.lang.System.arraycopy(this.$name$, 0, newArray, 0, i);\n"
    "  }\n"
    "  while (input.getBytesUntilLimit() > 0) {\n"
    "    int value = input.readInt32();\n"
    "    switch (value) {\n");
  printer->Indent();
  printer->Indent();
  PrintCaseLabels(printer, canonical_values_);
  printer->Outdent();
  printer->Outdent();
  printer->Print(variables_,
    "        newArray[i++] = value;\n"
    "        break;\n"
    "    }\n"
    "  }\n"
    "  this.$name$ = newArray;\n"
    "}\n"
    "input.popLimit(limit);\n");
}

void RepeatedEnumFieldGenerator::
GenerateRepeatedDataSizeCode(io::Printer* printer) const {
  // Creates a variable dataSize and puts the serialized size in there.
  printer->Print(variables_,
    "int dataSize = 0;\n"
    "for (int i = 0; i < this.$name$.length; i++) {\n"
    "  int element = this.$name$[i];\n"
    "  dataSize += com.google.protobuf.nano.CodedOutputByteBufferNano\n"
    "      .computeInt32SizeNoTag(element);\n"
    "}\n");
}

void RepeatedEnumFieldGenerator::
GenerateSerializationCode(io::Printer* printer) const {
  printer->Print(variables_,
    "if (this.$name$ != null && this.$name$.length > 0) {\n");
  printer->Indent();

  if (descriptor_->options().packed()) {
    GenerateRepeatedDataSizeCode(printer);
    printer->Print(variables_,
      "output.writeRawVarint32($tag$);\n"
      "output.writeRawVarint32(dataSize);\n"
      "for (int i = 0; i < this.$name$.length; i++) {\n"
      "  output.writeRawVarint32(this.$name$[i]);\n"
      "}\n");
  } else {
    printer->Print(variables_,
      "for (int i = 0; i < this.$name$.length; i++) {\n"
      "  output.writeInt32($number$, this.$name$[i]);\n"
      "}\n");
  }

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

void RepeatedEnumFieldGenerator::
GenerateSerializedSizeCode(io::Printer* printer) const {
  printer->Print(variables_,
    "if (this.$name$ != null && this.$name$.length > 0) {\n");
  printer->Indent();

  GenerateRepeatedDataSizeCode(printer);

  printer->Print(
    "size += dataSize;\n");
  if (descriptor_->options().packed()) {
    printer->Print(variables_,
      "size += $tag_size$;\n"
      "size += com.google.protobuf.nano.CodedOutputByteBufferNano\n"
      "    .computeRawVarint32Size(dataSize);\n");
  } else {
    printer->Print(variables_,
      "size += $tag_size$ * this.$name$.length;\n");
  }

  printer->Outdent();

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

void RepeatedEnumFieldGenerator::
GenerateFixClonedCode(io::Printer* printer) const {
  printer->Print(variables_,
    "if (this.$name$ != null && this.$name$.length > 0) {\n"
    "  cloned.$name$ = this.$name$.clone();\n"
    "}\n");
}

void RepeatedEnumFieldGenerator::
GenerateEqualsCode(io::Printer* printer) const {
  printer->Print(variables_,
    "if (!com.google.protobuf.nano.InternalNano.equals(\n"
    "    this.$name$, other.$name$)) {\n"
    "  return false;\n"
    "}\n");
}

void RepeatedEnumFieldGenerator::
GenerateHashCodeCode(io::Printer* printer) const {
  printer->Print(variables_,
    "result = 31 * result\n"
    "    + com.google.protobuf.nano.InternalNano.hashCode(this.$name$);\n");
}

}  // namespace javanano
}  // namespace compiler
}  // namespace protobuf
}  // namespace google


text:
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Author: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#include <iostream>

#include <google/protobuf/compiler/javanano/javanano_file.h>
#include <google/protobuf/compiler/javanano/javanano_enum.h>
#include <google/protobuf/compiler/javanano/javanano_extension.h>
#include <google/protobuf/compiler/javanano/javanano_helpers.h>
#include <google/protobuf/compiler/javanano/javanano_message.h>
#include <google/protobuf/compiler/code_generator.h>
#include <google/protobuf/io/printer.h>
#include <google/protobuf/io/zero_copy_stream.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/stubs/strutil.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace javanano {

namespace {

// Recursively searches the given message to see if it contains any extensions.
bool UsesExtensions(const Message& message) {
  const Reflection* reflection = message.GetReflection();

  // We conservatively assume that unknown fields are extensions.
  if (reflection->GetUnknownFields(message).field_count() > 0) return true;

  vector<const FieldDescriptor*> fields;
  reflection->ListFields(message, &fields);

  for (int i = 0; i < fields.size(); i++) {
    if (fields[i]->is_extension()) return true;

    if (fields[i]->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) {
      if (fields[i]->is_repeated()) {
        int size = reflection->FieldSize(message, fields[i]);
        for (int j = 0; j < size; j++) {
          const Message& sub_message =
            reflection->GetRepeatedMessage(message, fields[i], j);
          if (UsesExtensions(sub_message)) return true;
        }
      } else {
        const Message& sub_message = reflection->GetMessage(message, fields[i]);
        if (UsesExtensions(sub_message)) return true;
      }
    }
  }

  return false;
}

}  // namespace

FileGenerator::FileGenerator(const FileDescriptor* file, const Params& params)
  : file_(file),
    params_(params),
    java_package_(FileJavaPackage(params, file)),
    classname_(FileClassName(params, file)) {}

FileGenerator::~FileGenerator() {}

bool FileGenerator::Validate(string* error) {
  // Check for extensions
  FileDescriptorProto file_proto;
  file_->CopyTo(&file_proto);
  if (UsesExtensions(file_proto) && !params_.store_unknown_fields()) {
    error->assign(file_->name());
    error->append(
        ": Java NANO_RUNTIME only supports extensions when the "
        "'store_unknown_fields' generator option is 'true'.");
    return false;
  }

  if (file_->service_count() != 0 && !params_.ignore_services()) {
    error->assign(file_->name());
    error->append(
      ": Java NANO_RUNTIME does not support services\"");
    return false;
  }

  if (!IsOuterClassNeeded(params_, file_)) {
    return true;
  }

  // Check whether legacy javanano generator would omit the outer class.
  if (!params_.has_java_outer_classname(file_->name())
      && file_->message_type_count() == 1
      && file_->enum_type_count() == 0 && file_->extension_count() == 0) {
    std::cout << "INFO: " << file_->name() << ":" << std::endl;
    std::cout << "Javanano generator has changed to align with java generator. "
        "An outer class will be created for this file and the single message "
        "in the file will become a nested class. Use java_multiple_files to "
        "skip generating the outer class, or set an explicit "
        "java_outer_classname to suppress this message." << std::endl;
  }

  // Check that no class name matches the file's class name.  This is a common
  // problem that leads to Java compile errors that can be hard to understand.
  // It's especially bad when using the java_multiple_files, since we would
  // end up overwriting the outer class with one of the inner ones.
  bool found_conflict = false;
  for (int i = 0; !found_conflict && i < file_->message_type_count(); i++) {
    if (file_->message_type(i)->name() == classname_) {
      found_conflict = true;
    }
  }
  if (params_.java_enum_style()) {
    for (int i = 0; !found_conflict && i < file_->enum_type_count(); i++) {
      if (file_->enum_type(i)->name() == classname_) {
        found_conflict = true;
      }
    }
  }
  if (found_conflict) {
    error->assign(file_->name());
    error->append(
      ": Cannot generate Java output because the file's outer class name, \"");
    error->append(classname_);
    error->append(
      "\", matches the name of one of the types declared inside it.  "
      "Please either rename the type or use the java_outer_classname "
      "option to specify a different outer class name for the .proto file.");
    return false;
  }
  return true;
}

void FileGenerator::Generate(io::Printer* printer) {
  // We don't import anything because we refer to all classes by their
  // fully-qualified names in the generated source.
  printer->Print(
    "// Generated by the protocol buffer compiler.  DO NOT EDIT!\n");
  if (!java_package_.empty()) {
    printer->Print(
      "\n"
      "package $package$;\n",
      "package", java_package_);
  }

  // Note: constants (from enums, emitted in the loop below) may have the same names as constants
  // in the nested classes. This causes Java warnings, but is not fatal, so we suppress those
  // warnings here in the top-most class declaration.
  printer->Print(
    "\n"
    "@SuppressWarnings(\"hiding\")\n"
    "public interface $classname$ {\n",
    "classname", classname_);
  printer->Indent();

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

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

  // Enums.
  for (int i = 0; i < file_->enum_type_count(); i++) {
    EnumGenerator(file_->enum_type(i), params_).Generate(printer);
  }

  // Messages.
  if (!params_.java_multiple_files(file_->name())) {
    for (int i = 0; i < file_->message_type_count(); i++) {
      MessageGenerator(file_->message_type(i), params_).Generate(printer);
    }
  }

  // Static variables.
  for (int i = 0; i < file_->message_type_count(); i++) {
    // TODO(kenton):  Reuse MessageGenerator objects?
    MessageGenerator(file_->message_type(i), params_).GenerateStaticVariables(printer);
  }

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

template<typename GeneratorClass, typename DescriptorClass>
static void GenerateSibling(const string& package_dir,
                            const string& java_package,
                            const DescriptorClass* descriptor,
                            GeneratorContext* output_directory,
                            vector<string>* file_list,
                            const Params& params) {
  string filename = package_dir + descriptor->name() + ".java";
  file_list->push_back(filename);

  scoped_ptr<io::ZeroCopyOutputStream> output(
    output_directory->Open(filename));
  io::Printer printer(output.get(), '$');

  printer.Print(
    "// Generated by the protocol buffer compiler.  DO NOT EDIT!\n");
  if (!java_package.empty()) {
    printer.Print(
      "\n"
      "package $package$;\n",
      "package", java_package);
  }

  GeneratorClass(descriptor, params).Generate(&printer);
}

void FileGenerator::GenerateSiblings(const string& package_dir,
                                     GeneratorContext* output_directory,
                                     vector<string>* file_list) {
  if (params_.java_multiple_files(file_->name())) {
    for (int i = 0; i < file_->message_type_count(); i++) {
      GenerateSibling<MessageGenerator>(package_dir, java_package_,
                                        file_->message_type(i),
                                        output_directory, file_list, params_);
    }

    if (params_.java_enum_style()) {
      for (int i = 0; i < file_->enum_type_count(); i++) {
        GenerateSibling<EnumGenerator>(package_dir, java_package_,
                                       file_->enum_type(i),
                                       output_directory, file_list, params_);
      }
    }
  }
}

}  // namespace javanano
}  // namespace compiler
}  // namespace protobuf
}  // namespace google

mime_type: text/plain


text:
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef GOOGLE_PROTOBUF_COMPILER_JAVANANO_MAP_FIELD_H__
#define GOOGLE_PROTOBUF_COMPILER_JAVANANO_MAP_FIELD_H__

#include <map>
#include <string>
#include <vector>
#include <google/protobuf/compiler/javanano/javanano_field.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace javanano {

class MapFieldGenerator : public FieldGenerator {
 public:
  explicit MapFieldGenerator(
      const FieldDescriptor* descriptor, const Params& params);
  ~MapFieldGenerator();

  // implements FieldGenerator ---------------------------------------
  void GenerateMembers(io::Printer* printer, bool lazy_init) const;
  void GenerateClearCode(io::Printer* printer) const;
  void GenerateMergingCode(io::Printer* printer) const;
  void GenerateSerializationCode(io::Printer* printer) const;
  void GenerateSerializedSizeCode(io::Printer* printer) const;
  void GenerateEqualsCode(io::Printer* printer) const;
  void GenerateHashCodeCode(io::Printer* printer) const;

 private:
  const FieldDescriptor* descriptor_;
  std::map<string, string> variables_;

  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(MapFieldGenerator);
};

}  // namespace javanano
}  // namespace compiler
}  // namespace protobuf
}  // namespace google
#endif  // GOOGLE_PROTOBUF_COMPILER_JAVANANO_MAP_FIELD_H__


text:
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Author: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#ifndef GOOGLE_PROTOBUF_COMPILER_JAVANANO_ENUM_FIELD_H__
#define GOOGLE_PROTOBUF_COMPILER_JAVANANO_ENUM_FIELD_H__

#include <map>
#include <string>
#include <vector>
#include <google/protobuf/compiler/javanano/javanano_field.h>

namespace google {
namespace protobuf {
namespace compiler {
namespace javanano {

class EnumFieldGenerator : public FieldGenerator {
 public:
  explicit EnumFieldGenerator(
      const FieldDescriptor* descriptor, const Params& params);
  ~EnumFieldGenerator();

  // implements FieldGenerator ---------------------------------------
  void GenerateMembers(io::Printer* printer, bool lazy_init) const;
  void GenerateClearCode(io::Printer* printer) const;
  void GenerateMergingCode(io::Printer* printer) const;
  void GenerateSerializationCode(io::Printer* printer) const;
  void GenerateSerializedSizeCode(io::Printer* printer) const;
  void GenerateEqualsCode(io::Printer* printer) const;
  void GenerateHashCodeCode(io::Printer* printer) const;

 private:
  const FieldDescriptor* descriptor_;
  std::map<string, string> variables_;
  vector<string> canonical_values_;

  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(EnumFieldGenerator);
};

class AccessorEnumFieldGenerator : public FieldGenerator {
 public:
  explicit AccessorEnumFieldGenerator(const FieldDescriptor* descriptor,
      const Params& params, int has_bit_index);
  ~AccessorEnumFieldGenerator();

  // implements FieldGenerator ---------------------------------------
  void GenerateMembers(io::Printer* printer, bool lazy_init) const;
  void GenerateClearCode(io::Printer* printer) const;
  void GenerateMergingCode(io::Printer* printer) const;
  void GenerateSerializationCode(io::Printer* printer) const;
  void GenerateSerializedSizeCode(io::Printer* printer) const;
  void GenerateEqualsCode(io::Printer* printer) const;
  void GenerateHashCodeCode(io::Printer* printer) const;

 private:
  const FieldDescriptor* descriptor_;
  std::map<string, string> variables_;
  vector<string> canonical_values_;

  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(AccessorEnumFieldGenerator);
};

class RepeatedEnumFieldGenerator : public FieldGenerator {
 public:
  explicit RepeatedEnumFieldGenerator(
      const FieldDescriptor* descriptor, const Params& params);
  ~RepeatedEnumFieldGenerator();

  // implements FieldGenerator ---------------------------------------
  void GenerateMembers(io::Printer* printer, bool lazy_init) const;
  void GenerateClearCode(io::Printer* printer) const;
  void GenerateMergingCode(io::Printer* printer) const;
  void GenerateMergingCodeFromPacked(io::Printer* printer) const;
  void GenerateSerializationCode(io::Printer* printer) const;
  void GenerateSerializedSizeCode(io::Printer* printer) const;
  void GenerateEqualsCode(io::Printer* printer) const;
  void GenerateHashCodeCode(io::Printer* printer) const;
  void GenerateFixClonedCode(io::Printer* printer) const;

 private:
  void GenerateRepeatedDataSizeCode(io::Printer* printer) const;

  const FieldDescriptor* descriptor_;
  std::map<string, string> variables_;
  vector<string> canonical_values_;

  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(RepeatedEnumFieldGenerator);
};

}  // namespace javanano
}  // namespace compiler
}  // namespace protobuf

}  // namespace google
#endif  // GOOGLE_PROTOBUF_COMPILER_JAVANANO_ENUM_FIELD_H__


text:
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Author: robinson@google.com (Will Robinson)
//
// Generates Python code for a given .proto file.

#ifndef GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__
#define GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__

#include <string>

#include <google/protobuf/compiler/code_generator.h>
#include <google/protobuf/stubs/mutex.h>
#include <google/protobuf/stubs/common.h>

namespace google {
namespace protobuf {

class Descriptor;
class EnumDescriptor;
class EnumValueDescriptor;
class FieldDescriptor;
class OneofDescriptor;
class ServiceDescriptor;

namespace io { class Printer; }

namespace compiler {
namespace python {

// CodeGenerator implementation for generated Python protocol buffer classes.
// If you create your own protocol compiler binary and you want it to support
// Python output, you can do so by registering an instance of this
// CodeGenerator with the CommandLineInterface in your main() function.
class LIBPROTOC_EXPORT Generator : public CodeGenerator {
 public:
  Generator();
  virtual ~Generator();

  // CodeGenerator methods.
  virtual bool Generate(const FileDescriptor* file,
                        const string& parameter,
                        GeneratorContext* generator_context,
                        string* error) const;

 private:
  void PrintImports() const;
  void PrintFileDescriptor() const;
  void PrintTopLevelEnums() const;
  void PrintAllNestedEnumsInFile() const;
  void PrintNestedEnums(const Descriptor& descriptor) const;
  void PrintEnum(const EnumDescriptor& enum_descriptor) const;

  void PrintTopLevelExtensions() const;

  void PrintFieldDescriptor(
      const FieldDescriptor& field, bool is_extension) const;
  void PrintFieldDescriptorsInDescriptor(
      const Descriptor& message_descriptor,
      bool is_extension,
      const string& list_variable_name,
      int (Descriptor::*CountFn)() const,
      const FieldDescriptor* (Descriptor::*GetterFn)(int) const) const;
  void PrintFieldsInDescriptor(const Descriptor& message_descriptor) const;
  void PrintExtensionsInDescriptor(const Descriptor& message_descriptor) const;
  void PrintMessageDescriptors() const;
  void PrintDescriptor(const Descriptor& message_descriptor) const;
  void PrintNestedDescriptors(const Descriptor& containing_descriptor) const;

  void PrintMessages() const;
  void PrintMessage(const Descriptor& message_descriptor, const string& prefix,
                    std::vector<string>* to_register) const;
  void PrintNestedMessages(const Descriptor& containing_descriptor,
                           const string& prefix,
                           std::vector<string>* to_register) const;

  void FixForeignFieldsInDescriptors() const;
  void FixForeignFieldsInDescriptor(
      const Descriptor& descriptor,
      const Descriptor* containing_descriptor) const;
  void FixForeignFieldsInField(const Descriptor* containing_type,
                               const FieldDescriptor& field,
                               const string& python_dict_name) const;
  void AddMessageToFileDescriptor(const Descriptor& descriptor) const;
  void AddEnumToFileDescriptor(const EnumDescriptor& descriptor) const;
  void AddExtensionToFileDescriptor(const FieldDescriptor& descriptor) const;
  void AddServiceToFileDescriptor(const ServiceDescriptor& descriptor) const;
  string FieldReferencingExpression(const Descriptor* containing_type,
                                    const FieldDescriptor& field,
                                    const string& python_dict_name) const;
  template <typename DescriptorT>
  void FixContainingTypeInDescriptor(
      const DescriptorT& descriptor,
      const Descriptor* containing_descriptor) const;

  void FixForeignFieldsInExtensions() const;
  void FixForeignFieldsInExtension(
      const FieldDescriptor& extension_field) const;
  void FixForeignFieldsInNestedExtensions(const Descriptor& descriptor) const;

  void PrintServices() const;
  void PrintServiceDescriptors() const;
  void PrintServiceDescriptor(const ServiceDescriptor& descriptor) const;
  void PrintServiceClass(const ServiceDescriptor& descriptor) const;
  void PrintServiceStub(const ServiceDescriptor& descriptor) const;
  void PrintDescriptorKeyAndModuleName(
      const ServiceDescriptor& descriptor) const;

  void PrintEnumValueDescriptor(const EnumValueDescriptor& descriptor) const;
  string OptionsValue(const string& class_name,
                      const string& serialized_options) const;
  bool GeneratingDescriptorProto() const;

  template <typename DescriptorT>
  string ModuleLevelDescriptorName(const DescriptorT& descriptor) const;
  string ModuleLevelMessageName(const Descriptor& descriptor) const;
  string ModuleLevelServiceDescriptorName(
      const ServiceDescriptor& descriptor) const;

  template <typename DescriptorT, typename DescriptorProtoT>
  void PrintSerializedPbInterval(
      const DescriptorT& descriptor, DescriptorProtoT& proto) const;

  void FixAllDescriptorOptions() const;
  void FixOptionsForField(const FieldDescriptor& field) const;
  void FixOptionsForOneof(const OneofDescriptor& oneof) const;
  void FixOptionsForEnum(const EnumDescriptor& descriptor) const;
  void FixOptionsForMessage(const Descriptor& descriptor) const;

  void CopyPublicDependenciesAliases(
      const string& copy_from, const FileDescriptor* file) const;

  // Very coarse-grained lock to ensure that Generate() is reentrant.
  // Guards file_, printer_ and file_descriptor_serialized_.
  mutable Mutex mutex_;
  mutable const FileDescriptor* file_;  // Set in Generate().  Under mutex_.
  mutable string file_descriptor_serialized_;
  mutable io::Printer* printer_;  // Set in Generate().  Under mutex_.

  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(Generator);
};

}  // namespace python
}  // namespace compiler
}  // namespace protobuf

}  // namespace google
#endif  // GOOGLE_PROTOBUF_COMPILER_PYTHON_GENERATOR_H__