// 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: 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/stubs/logging.h>
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/compiler/java/java_context.h>
#include <google/protobuf/compiler/java/java_doc_comment.h>
#include <google/protobuf/compiler/java/java_helpers.h>
#include <google/protobuf/compiler/java/java_name_resolver.h>
#include <google/protobuf/compiler/java/java_primitive_field.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 java {

using internal::WireFormat;
using internal::WireFormatLite;

namespace {

void SetPrimitiveVariables(const FieldDescriptor* descriptor,
                           int messageBitIndex, int builderBitIndex,
                           const FieldGeneratorInfo* info,
                           ClassNameResolver* name_resolver,
                           std::map<std::string, std::string>* variables) {
  SetCommonFieldVariables(descriptor, info, variables);
  JavaType javaType = GetJavaType(descriptor);

  (*variables)["type"] = PrimitiveTypeName(javaType);
  (*variables)["boxed_type"] = BoxedPrimitiveTypeName(javaType);
  (*variables)["field_type"] = (*variables)["type"];

  if (javaType == JAVATYPE_BOOLEAN || javaType == JAVATYPE_DOUBLE ||
      javaType == JAVATYPE_FLOAT || javaType == JAVATYPE_INT ||
      javaType == JAVATYPE_LONG) {
    std::string capitalized_type = UnderscoresToCamelCase(
        PrimitiveTypeName(javaType), /*cap_first_letter=*/true);
    (*variables)["field_list_type"] =
        "com.google.protobuf.Internal." + capitalized_type + "List";
    (*variables)["empty_list"] = "empty" + capitalized_type + "List()";
    (*variables)["create_list"] = "new" + capitalized_type + "List()";
    (*variables)["mutable_copy_list"] =
        "mutableCopy(" + (*variables)["name"] + "_)";
    (*variables)["name_make_immutable"] =
        (*variables)["name"] + "_.makeImmutable()";
    (*variables)["repeated_get"] =
        (*variables)["name"] + "_.get" + capitalized_type;
    (*variables)["repeated_add"] =
        (*variables)["name"] + "_.add" + capitalized_type;
    (*variables)["repeated_set"] =
        (*variables)["name"] + "_.set" + capitalized_type;
  } else {
    (*variables)["field_list_type"] =
        "java.util.List<" + (*variables)["boxed_type"] + ">";
    (*variables)["create_list"] =
        "new java.util.ArrayList<" + (*variables)["boxed_type"] + ">()";
    (*variables)["mutable_copy_list"] = "new java.util.ArrayList<" +
                                        (*variables)["boxed_type"] + ">(" +
                                        (*variables)["name"] + "_)";
    (*variables)["empty_list"] = "java.util.Collections.emptyList()";
    (*variables)["name_make_immutable"] =
        (*variables)["name"] + "_ = java.util.Collections.unmodifiableList(" +
        (*variables)["name"] + "_)";
    (*variables)["repeated_get"] = (*variables)["name"] + "_.get";
    (*variables)["repeated_add"] = (*variables)["name"] + "_.add";
    (*variables)["repeated_set"] = (*variables)["name"] + "_.set";
  }

  (*variables)["default"] = ImmutableDefaultValue(descriptor, name_resolver);
  (*variables)["default_init"] =
      IsDefaultValueJavaDefault(descriptor)
          ? ""
          : ("= " + ImmutableDefaultValue(descriptor, name_resolver));
  (*variables)["capitalized_type"] =
      GetCapitalizedType(descriptor, /* immutable = */ true);
  (*variables)["tag"] =
      StrCat(static_cast<int32>(WireFormat::MakeTag(descriptor)));
  (*variables)["tag_size"] = StrCat(
      WireFormat::TagSize(descriptor->number(), GetType(descriptor)));
  if (IsReferenceType(GetJavaType(descriptor))) {
    (*variables)["null_check"] =
        "  if (value == null) {\n"
        "    throw new NullPointerException();\n"
        "  }\n";
  } else {
    (*variables)["null_check"] = "";
  }
  // TODO(birdo): Add @deprecated javadoc when generating javadoc is supported
  // by the proto compiler
  (*variables)["deprecation"] =
      descriptor->options().deprecated() ? "@java.lang.Deprecated " : "";
  int fixed_size = FixedSize(GetType(descriptor));
  if (fixed_size != -1) {
    (*variables)["fixed_size"] = StrCat(fixed_size);
  }
  (*variables)["on_changed"] = "onChanged();";

  if (SupportFieldPresence(descriptor)) {
    // For singular messages and builders, one bit is used for the hasField bit.
    (*variables)["get_has_field_bit_message"] = GenerateGetBit(messageBitIndex);
    (*variables)["get_has_field_bit_builder"] = GenerateGetBit(builderBitIndex);

    // Note that these have a trailing ";".
    (*variables)["set_has_field_bit_message"] =
        GenerateSetBit(messageBitIndex) + ";";
    (*variables)["set_has_field_bit_builder"] =
        GenerateSetBit(builderBitIndex) + ";";
    (*variables)["clear_has_field_bit_builder"] =
        GenerateClearBit(builderBitIndex) + ";";

    (*variables)["is_field_present_message"] = GenerateGetBit(messageBitIndex);
  } else {
    (*variables)["set_has_field_bit_message"] = "";
    (*variables)["set_has_field_bit_builder"] = "";
    (*variables)["clear_has_field_bit_builder"] = "";

    if (descriptor->type() == FieldDescriptor::TYPE_BYTES) {
      (*variables)["is_field_present_message"] =
          "!" + (*variables)["name"] + "_.isEmpty()";
    } else {
      (*variables)["is_field_present_message"] =
          (*variables)["name"] + "_ != " + (*variables)["default"];
    }
  }

  // For repeated builders, one bit is used for whether the array is immutable.
  (*variables)["get_mutable_bit_builder"] = GenerateGetBit(builderBitIndex);
  (*variables)["set_mutable_bit_builder"] = GenerateSetBit(builderBitIndex);
  (*variables)["clear_mutable_bit_builder"] = GenerateClearBit(builderBitIndex);

  // For repeated fields, one bit is used for whether the array is immutable
  // in the parsing constructor.
  (*variables)["get_mutable_bit_parser"] =
      GenerateGetBitMutableLocal(builderBitIndex);
  (*variables)["set_mutable_bit_parser"] =
      GenerateSetBitMutableLocal(builderBitIndex);

  (*variables)["get_has_field_bit_from_local"] =
      GenerateGetBitFromLocal(builderBitIndex);
  (*variables)["set_has_field_bit_to_local"] =
      GenerateSetBitToLocal(messageBitIndex);
}

}  // namespace

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

ImmutablePrimitiveFieldGenerator::ImmutablePrimitiveFieldGenerator(
    const FieldDescriptor* descriptor, int messageBitIndex, int builderBitIndex,
    Context* context)
    : descriptor_(descriptor), name_resolver_(context->GetNameResolver()) {
  SetPrimitiveVariables(descriptor, messageBitIndex, builderBitIndex,
                        context->GetFieldGeneratorInfo(descriptor),
                        name_resolver_, &variables_);
}

ImmutablePrimitiveFieldGenerator::~ImmutablePrimitiveFieldGenerator() {}

int ImmutablePrimitiveFieldGenerator::GetNumBitsForMessage() const {
  return SupportFieldPresence(descriptor_) ? 1 : 0;
}

int ImmutablePrimitiveFieldGenerator::GetNumBitsForBuilder() const {
  return GetNumBitsForMessage();
}

void ImmutablePrimitiveFieldGenerator::GenerateInterfaceMembers(
    io::Printer* printer) const {
  if (SupportFieldPresence(descriptor_)) {
    WriteFieldAccessorDocComment(printer, descriptor_, HAZZER);
    printer->Print(variables_,
                   "$deprecation$boolean has$capitalized_name$();\n");
  }
  WriteFieldAccessorDocComment(printer, descriptor_, GETTER);
  printer->Print(variables_, "$deprecation$$type$ get$capitalized_name$();\n");
}

void ImmutablePrimitiveFieldGenerator::GenerateMembers(
    io::Printer* printer) const {
  printer->Print(variables_, "private $field_type$ $name$_;\n");
  PrintExtraFieldInfo(variables_, printer);
  if (SupportFieldPresence(descriptor_)) {
    WriteFieldAccessorDocComment(printer, descriptor_, HAZZER);
    printer->Print(
        variables_,
        "@java.lang.Override\n"
        "$deprecation$public boolean ${$has$capitalized_name$$}$() {\n"
        "  return $get_has_field_bit_message$;\n"
        "}\n");
    printer->Annotate("{", "}", descriptor_);
  }

  WriteFieldAccessorDocComment(printer, descriptor_, GETTER);
  printer->Print(variables_,
                 "@java.lang.Override\n"
                 "$deprecation$public $type$ ${$get$capitalized_name$$}$() {\n"
                 "  return $name$_;\n"
                 "}\n");
  printer->Annotate("{", "}", descriptor_);
}

void ImmutablePrimitiveFieldGenerator::GenerateBuilderMembers(
    io::Printer* printer) const {
  printer->Print(variables_, "private $field_type$ $name$_ $default_init$;\n");

  if (SupportFieldPresence(descriptor_)) {
    WriteFieldAccessorDocComment(printer, descriptor_, HAZZER);
    printer->Print(
        variables_,
        "@java.lang.Override\n"
        "$deprecation$public boolean ${$has$capitalized_name$$}$() {\n"
        "  return $get_has_field_bit_builder$;\n"
        "}\n");
    printer->Annotate("{", "}", descriptor_);
  }

  WriteFieldAccessorDocComment(printer, descriptor_, GETTER);
  printer->Print(variables_,
                 "@java.lang.Override\n"
                 "$deprecation$public $type$ ${$get$capitalized_name$$}$() {\n"
                 "  return $name$_;\n"
                 "}\n");
  printer->Annotate("{", "}", descriptor_);

  WriteFieldAccessorDocComment(printer, descriptor_, SETTER,
                               /* builder */ true);
  printer->Print(variables_,
                 "$deprecation$public Builder "
                 "${$set$capitalized_name$$}$($type$ value) {\n"
                 "$null_check$"
                 "  $set_has_field_bit_builder$\n"
                 "  $name$_ = value;\n"
                 "  $on_changed$\n"
                 "  return this;\n"
                 "}\n");
  printer->Annotate("{", "}", descriptor_);

  WriteFieldAccessorDocComment(printer, descriptor_, CLEARER,
                               /* builder */ true);
  printer->Print(
      variables_,
      "$deprecation$public Builder ${$clear$capitalized_name$$}$() {\n"
      "  $clear_has_field_bit_builder$\n");
  printer->Annotate("{", "}", descriptor_);
  JavaType type = GetJavaType(descriptor_);
  if (type == JAVATYPE_STRING || type == JAVATYPE_BYTES) {
    // The default value is not a simple literal so we want to avoid executing
    // it multiple times.  Instead, get the default out of the default instance.
    printer->Print(
        variables_,
        "  $name$_ = getDefaultInstance().get$capitalized_name$();\n");
  } else {
    printer->Print(variables_, "  $name$_ = $default$;\n");
  }
  printer->Print(variables_,
                 "  $on_changed$\n"
                 "  return this;\n"
                 "}\n");
}


void ImmutablePrimitiveFieldGenerator::GenerateFieldBuilderInitializationCode(
    io::Printer* printer) const {
  // noop for primitives
}

void ImmutablePrimitiveFieldGenerator::GenerateInitializationCode(
    io::Printer* printer) const {
  if (!IsDefaultValueJavaDefault(descriptor_)) {
    printer->Print(variables_, "$name$_ = $default$;\n");
  }
}

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

void ImmutablePrimitiveFieldGenerator::GenerateMergingCode(
    io::Printer* printer) const {
  if (SupportFieldPresence(descriptor_)) {
    printer->Print(variables_,
                   "if (other.has$capitalized_name$()) {\n"
                   "  set$capitalized_name$(other.get$capitalized_name$());\n"
                   "}\n");
  } else {
    printer->Print(variables_,
                   "if (other.get$capitalized_name$() != $default$) {\n"
                   "  set$capitalized_name$(other.get$capitalized_name$());\n"
                   "}\n");
  }
}

void ImmutablePrimitiveFieldGenerator::GenerateBuildingCode(
    io::Printer* printer) const {
  if (SupportFieldPresence(descriptor_)) {
    if (IsDefaultValueJavaDefault(descriptor_)) {
      printer->Print(variables_,
                     "if ($get_has_field_bit_from_local$) {\n"
                     "  result.$name$_ = $name$_;\n"
                     "  $set_has_field_bit_to_local$;\n"
                     "}\n");
    } else {
      printer->Print(variables_,
                     "if ($get_has_field_bit_from_local$) {\n"
                     "  $set_has_field_bit_to_local$;\n"
                     "}\n"
                     "result.$name$_ = $name$_;\n");
    }
  } else {
    printer->Print(variables_, "result.$name$_ = $name$_;\n");
  }
}

void ImmutablePrimitiveFieldGenerator::GenerateParsingCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "$set_has_field_bit_message$\n"
                 "$name$_ = input.read$capitalized_type$();\n");
}

void ImmutablePrimitiveFieldGenerator::GenerateParsingDoneCode(
    io::Printer* printer) const {
  // noop for primitives.
}

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

void ImmutablePrimitiveFieldGenerator::GenerateSerializedSizeCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "if ($is_field_present_message$) {\n"
                 "  size += com.google.protobuf.CodedOutputStream\n"
                 "    .compute$capitalized_type$Size($number$, $name$_);\n"
                 "}\n");
}

void ImmutablePrimitiveFieldGenerator::GenerateEqualsCode(
    io::Printer* printer) const {
  switch (GetJavaType(descriptor_)) {
    case JAVATYPE_INT:
    case JAVATYPE_LONG:
    case JAVATYPE_BOOLEAN:
      printer->Print(variables_,
                     "if (get$capitalized_name$()\n"
                     "    != other.get$capitalized_name$()) return false;\n");
      break;

    case JAVATYPE_FLOAT:
      printer->Print(
          variables_,
          "if (java.lang.Float.floatToIntBits(get$capitalized_name$())\n"
          "    != java.lang.Float.floatToIntBits(\n"
          "        other.get$capitalized_name$())) return false;\n");
      break;

    case JAVATYPE_DOUBLE:
      printer->Print(
          variables_,
          "if (java.lang.Double.doubleToLongBits(get$capitalized_name$())\n"
          "    != java.lang.Double.doubleToLongBits(\n"
          "        other.get$capitalized_name$())) return false;\n");
      break;

    case JAVATYPE_STRING:
    case JAVATYPE_BYTES:
      printer->Print(
          variables_,
          "if (!get$capitalized_name$()\n"
          "    .equals(other.get$capitalized_name$())) return false;\n");
      break;

    case JAVATYPE_ENUM:
    case JAVATYPE_MESSAGE:
    default:
      GOOGLE_LOG(FATAL) << "Can't get here.";
      break;
  }
}

void ImmutablePrimitiveFieldGenerator::GenerateHashCode(
    io::Printer* printer) const {
  printer->Print(variables_, "hash = (37 * hash) + $constant_name$;\n");
  switch (GetJavaType(descriptor_)) {
    case JAVATYPE_INT:
      printer->Print(variables_,
                     "hash = (53 * hash) + get$capitalized_name$();\n");
      break;

    case JAVATYPE_LONG:
      printer->Print(
          variables_,
          "hash = (53 * hash) + com.google.protobuf.Internal.hashLong(\n"
          "    get$capitalized_name$());\n");
      break;

    case JAVATYPE_BOOLEAN:
      printer->Print(
          variables_,
          "hash = (53 * hash) + com.google.protobuf.Internal.hashBoolean(\n"
          "    get$capitalized_name$());\n");
      break;

    case JAVATYPE_FLOAT:
      printer->Print(variables_,
                     "hash = (53 * hash) + java.lang.Float.floatToIntBits(\n"
                     "    get$capitalized_name$());\n");
      break;

    case JAVATYPE_DOUBLE:
      printer->Print(
          variables_,
          "hash = (53 * hash) + com.google.protobuf.Internal.hashLong(\n"
          "    java.lang.Double.doubleToLongBits(get$capitalized_name$()));\n");
      break;

    case JAVATYPE_STRING:
    case JAVATYPE_BYTES:
      printer->Print(
          variables_,
          "hash = (53 * hash) + get$capitalized_name$().hashCode();\n");
      break;

    case JAVATYPE_ENUM:
    case JAVATYPE_MESSAGE:
    default:
      GOOGLE_LOG(FATAL) << "Can't get here.";
      break;
  }
}

std::string ImmutablePrimitiveFieldGenerator::GetBoxedType() const {
  return BoxedPrimitiveTypeName(GetJavaType(descriptor_));
}

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

ImmutablePrimitiveOneofFieldGenerator::ImmutablePrimitiveOneofFieldGenerator(
    const FieldDescriptor* descriptor, int messageBitIndex, int builderBitIndex,
    Context* context)
    : ImmutablePrimitiveFieldGenerator(descriptor, messageBitIndex,
                                       builderBitIndex, context) {
  const OneofGeneratorInfo* info =
      context->GetOneofGeneratorInfo(descriptor->containing_oneof());
  SetCommonOneofVariables(descriptor, info, &variables_);
}

ImmutablePrimitiveOneofFieldGenerator::
    ~ImmutablePrimitiveOneofFieldGenerator() {}

void ImmutablePrimitiveOneofFieldGenerator::GenerateMembers(
    io::Printer* printer) const {
  PrintExtraFieldInfo(variables_, printer);
  if (SupportFieldPresence(descriptor_)) {
    WriteFieldAccessorDocComment(printer, descriptor_, HAZZER);
    printer->Print(
        variables_,
        "@java.lang.Override\n"
        "$deprecation$public boolean ${$has$capitalized_name$$}$() {\n"
        "  return $has_oneof_case_message$;\n"
        "}\n");
    printer->Annotate("{", "}", descriptor_);
  }

  WriteFieldAccessorDocComment(printer, descriptor_, GETTER);
  printer->Print(variables_,
                 "@java.lang.Override\n"
                 "$deprecation$public $type$ ${$get$capitalized_name$$}$() {\n"
                 "  if ($has_oneof_case_message$) {\n"
                 "    return ($boxed_type$) $oneof_name$_;\n"
                 "  }\n"
                 "  return $default$;\n"
                 "}\n");
  printer->Annotate("{", "}", descriptor_);
}

void ImmutablePrimitiveOneofFieldGenerator::GenerateBuilderMembers(
    io::Printer* printer) const {
  if (SupportFieldPresence(descriptor_)) {
    WriteFieldAccessorDocComment(printer, descriptor_, HAZZER);
    printer->Print(
        variables_,
        "$deprecation$public boolean ${$has$capitalized_name$$}$() {\n"
        "  return $has_oneof_case_message$;\n"
        "}\n");
    printer->Annotate("{", "}", descriptor_);
  }

  WriteFieldAccessorDocComment(printer, descriptor_, GETTER);
  printer->Print(variables_,
                 "$deprecation$public $type$ ${$get$capitalized_name$$}$() {\n"
                 "  if ($has_oneof_case_message$) {\n"
                 "    return ($boxed_type$) $oneof_name$_;\n"
                 "  }\n"
                 "  return $default$;\n"
                 "}\n");
  printer->Annotate("{", "}", descriptor_);

  WriteFieldAccessorDocComment(printer, descriptor_, SETTER,
                               /* builder */ true);
  printer->Print(variables_,
                 "$deprecation$public Builder "
                 "${$set$capitalized_name$$}$($type$ value) {\n"
                 "$null_check$"
                 "  $set_oneof_case_message$;\n"
                 "  $oneof_name$_ = value;\n"
                 "  $on_changed$\n"
                 "  return this;\n"
                 "}\n");
  printer->Annotate("{", "}", descriptor_);

  WriteFieldAccessorDocComment(printer, descriptor_, CLEARER,
                               /* builder */ true);
  printer->Print(
      variables_,
      "$deprecation$public Builder ${$clear$capitalized_name$$}$() {\n"
      "  if ($has_oneof_case_message$) {\n"
      "    $clear_oneof_case_message$;\n"
      "    $oneof_name$_ = null;\n"
      "    $on_changed$\n"
      "  }\n"
      "  return this;\n"
      "}\n");
  printer->Annotate("{", "}", descriptor_);
}

void ImmutablePrimitiveOneofFieldGenerator::GenerateBuildingCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "if ($has_oneof_case_message$) {\n"
                 "  result.$oneof_name$_ = $oneof_name$_;\n"
                 "}\n");
}

void ImmutablePrimitiveOneofFieldGenerator::GenerateMergingCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "set$capitalized_name$(other.get$capitalized_name$());\n");
}

void ImmutablePrimitiveOneofFieldGenerator::GenerateParsingCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "$set_oneof_case_message$;\n"
                 "$oneof_name$_ = input.read$capitalized_type$();\n");
}

void ImmutablePrimitiveOneofFieldGenerator::GenerateSerializationCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "if ($has_oneof_case_message$) {\n"
                 "  output.write$capitalized_type$(\n");
  // $type$ and $boxed_type$ is the same for bytes fields so we don't need to
  // do redundant casts.
  if (GetJavaType(descriptor_) == JAVATYPE_BYTES) {
    printer->Print(variables_, "      $number$, ($type$) $oneof_name$_);\n");
  } else {
    printer->Print(
        variables_,
        "      $number$, ($type$)(($boxed_type$) $oneof_name$_));\n");
  }
  printer->Print("}\n");
}

void ImmutablePrimitiveOneofFieldGenerator::GenerateSerializedSizeCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "if ($has_oneof_case_message$) {\n"
                 "  size += com.google.protobuf.CodedOutputStream\n"
                 "    .compute$capitalized_type$Size(\n");
  // $type$ and $boxed_type$ is the same for bytes fields so we don't need to
  // do redundant casts.
  if (GetJavaType(descriptor_) == JAVATYPE_BYTES) {
    printer->Print(variables_, "        $number$, ($type$) $oneof_name$_);\n");
  } else {
    printer->Print(
        variables_,
        "        $number$, ($type$)(($boxed_type$) $oneof_name$_));\n");
  }
  printer->Print("}\n");
}

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

RepeatedImmutablePrimitiveFieldGenerator::
    RepeatedImmutablePrimitiveFieldGenerator(const FieldDescriptor* descriptor,
                                             int messageBitIndex,
                                             int builderBitIndex,
                                             Context* context)
    : descriptor_(descriptor), name_resolver_(context->GetNameResolver()) {
  SetPrimitiveVariables(descriptor, messageBitIndex, builderBitIndex,
                        context->GetFieldGeneratorInfo(descriptor),
                        name_resolver_, &variables_);
}

RepeatedImmutablePrimitiveFieldGenerator::
    ~RepeatedImmutablePrimitiveFieldGenerator() {}

int RepeatedImmutablePrimitiveFieldGenerator::GetNumBitsForMessage() const {
  return 0;
}

int RepeatedImmutablePrimitiveFieldGenerator::GetNumBitsForBuilder() const {
  return 1;
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateInterfaceMembers(
    io::Printer* printer) const {
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_GETTER);
  printer->Print(variables_,
                 "$deprecation$java.util.List<$boxed_type$> "
                 "get$capitalized_name$List();\n");
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_COUNT);
  printer->Print(variables_,
                 "$deprecation$int get$capitalized_name$Count();\n");
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_INDEXED_GETTER);
  printer->Print(variables_,
                 "$deprecation$$type$ get$capitalized_name$(int index);\n");
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateMembers(
    io::Printer* printer) const {
  printer->Print(variables_, "private $field_list_type$ $name$_;\n");
  PrintExtraFieldInfo(variables_, printer);
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_GETTER);
  printer->Print(variables_,
                 "@java.lang.Override\n"
                 "$deprecation$public java.util.List<$boxed_type$>\n"
                 "    ${$get$capitalized_name$List$}$() {\n"
                 "  return $name$_;\n"  // note:  unmodifiable list
                 "}\n");
  printer->Annotate("{", "}", descriptor_);
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_COUNT);
  printer->Print(
      variables_,
      "$deprecation$public int ${$get$capitalized_name$Count$}$() {\n"
      "  return $name$_.size();\n"
      "}\n");
  printer->Annotate("{", "}", descriptor_);
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_INDEXED_GETTER);
  printer->Print(
      variables_,
      "$deprecation$public $type$ ${$get$capitalized_name$$}$(int index) {\n"
      "  return $repeated_get$(index);\n"
      "}\n");
  printer->Annotate("{", "}", descriptor_);

  if (descriptor_->is_packed()) {
    printer->Print(variables_,
                   "private int $name$MemoizedSerializedSize = -1;\n");
  }
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateBuilderMembers(
    io::Printer* printer) const {
  // One field is the list and the bit field keeps track of whether the
  // list is immutable. If it's immutable, the invariant is that it must
  // either an instance of Collections.emptyList() or it's an ArrayList
  // wrapped in a Collections.unmodifiableList() wrapper and nobody else has
  // a refererence to the underlying ArrayList. This invariant allows us to
  // share instances of lists between protocol buffers avoiding expensive
  // memory allocations. Note, immutable is a strong guarantee here -- not
  // just that the list cannot be modified via the reference but that the
  // list can never be modified.
  printer->Print(variables_,
                 "private $field_list_type$ $name$_ = $empty_list$;\n");

  printer->Print(variables_,
                 "private void ensure$capitalized_name$IsMutable() {\n"
                 "  if (!$get_mutable_bit_builder$) {\n"
                 "    $name$_ = $mutable_copy_list$;\n"
                 "    $set_mutable_bit_builder$;\n"
                 "   }\n"
                 "}\n");

  // Note:  We return an unmodifiable list because otherwise the caller
  //   could hold on to the returned list and modify it after the message
  //   has been built, thus mutating the message which is supposed to be
  //   immutable.
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_GETTER);
  printer->Print(
      variables_,
      "$deprecation$public java.util.List<$boxed_type$>\n"
      "    ${$get$capitalized_name$List$}$() {\n"
      "  return $get_mutable_bit_builder$ ?\n"
      "           java.util.Collections.unmodifiableList($name$_) : $name$_;\n"
      "}\n");
  printer->Annotate("{", "}", descriptor_);
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_COUNT);
  printer->Print(
      variables_,
      "$deprecation$public int ${$get$capitalized_name$Count$}$() {\n"
      "  return $name$_.size();\n"
      "}\n");
  printer->Annotate("{", "}", descriptor_);
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_INDEXED_GETTER);
  printer->Print(
      variables_,
      "$deprecation$public $type$ ${$get$capitalized_name$$}$(int index) {\n"
      "  return $repeated_get$(index);\n"
      "}\n");
  printer->Annotate("{", "}", descriptor_);
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_INDEXED_SETTER,
                               /* builder */ true);
  printer->Print(variables_,
                 "$deprecation$public Builder ${$set$capitalized_name$$}$(\n"
                 "    int index, $type$ value) {\n"
                 "$null_check$"
                 "  ensure$capitalized_name$IsMutable();\n"
                 "  $repeated_set$(index, value);\n"
                 "  $on_changed$\n"
                 "  return this;\n"
                 "}\n");
  printer->Annotate("{", "}", descriptor_);
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_ADDER,
                               /* builder */ true);
  printer->Print(variables_,
                 "$deprecation$public Builder "
                 "${$add$capitalized_name$$}$($type$ value) {\n"
                 "$null_check$"
                 "  ensure$capitalized_name$IsMutable();\n"
                 "  $repeated_add$(value);\n"
                 "  $on_changed$\n"
                 "  return this;\n"
                 "}\n");
  printer->Annotate("{", "}", descriptor_);
  WriteFieldAccessorDocComment(printer, descriptor_, LIST_MULTI_ADDER,
                               /* builder */ true);
  printer->Print(variables_,
                 "$deprecation$public Builder ${$addAll$capitalized_name$$}$(\n"
                 "    java.lang.Iterable<? extends $boxed_type$> values) {\n"
                 "  ensure$capitalized_name$IsMutable();\n"
                 "  com.google.protobuf.AbstractMessageLite.Builder.addAll(\n"
                 "      values, $name$_);\n"
                 "  $on_changed$\n"
                 "  return this;\n"
                 "}\n");
  printer->Annotate("{", "}", descriptor_);
  WriteFieldAccessorDocComment(printer, descriptor_, CLEARER,
                               /* builder */ true);
  printer->Print(
      variables_,
      "$deprecation$public Builder ${$clear$capitalized_name$$}$() {\n"
      "  $name$_ = $empty_list$;\n"
      "  $clear_mutable_bit_builder$;\n"
      "  $on_changed$\n"
      "  return this;\n"
      "}\n");
  printer->Annotate("{", "}", descriptor_);
}

void RepeatedImmutablePrimitiveFieldGenerator::
    GenerateFieldBuilderInitializationCode(io::Printer* printer) const {
  // noop for primitives
}

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

void RepeatedImmutablePrimitiveFieldGenerator::GenerateBuilderClearCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "$name$_ = $empty_list$;\n"
                 "$clear_mutable_bit_builder$;\n");
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateMergingCode(
    io::Printer* printer) const {
  // The code below does two optimizations:
  //   1. If the other list is empty, there's nothing to do. This ensures we
  //      don't allocate a new array if we already have an immutable one.
  //   2. If the other list is non-empty and our current list is empty, we can
  //      reuse the other list which is guaranteed to be immutable.
  printer->Print(variables_,
                 "if (!other.$name$_.isEmpty()) {\n"
                 "  if ($name$_.isEmpty()) {\n"
                 "    $name$_ = other.$name$_;\n"
                 "    $clear_mutable_bit_builder$;\n"
                 "  } else {\n"
                 "    ensure$capitalized_name$IsMutable();\n"
                 "    $name$_.addAll(other.$name$_);\n"
                 "  }\n"
                 "  $on_changed$\n"
                 "}\n");
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateBuildingCode(
    io::Printer* printer) const {
  // The code below ensures that the result has an immutable list. If our
  // list is immutable, we can just reuse it. If not, we make it immutable.
  printer->Print(variables_,
                 "if ($get_mutable_bit_builder$) {\n"
                 "  $name_make_immutable$;\n"
                 "  $clear_mutable_bit_builder$;\n"
                 "}\n"
                 "result.$name$_ = $name$_;\n");
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateParsingCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "if (!$get_mutable_bit_parser$) {\n"
                 "  $name$_ = $create_list$;\n"
                 "  $set_mutable_bit_parser$;\n"
                 "}\n"
                 "$repeated_add$(input.read$capitalized_type$());\n");
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateParsingCodeFromPacked(
    io::Printer* printer) const {
  printer->Print(
      variables_,
      "int length = input.readRawVarint32();\n"
      "int limit = input.pushLimit(length);\n"
      "if (!$get_mutable_bit_parser$ && input.getBytesUntilLimit() > 0) {\n"
      "  $name$_ = $create_list$;\n"
      "  $set_mutable_bit_parser$;\n"
      "}\n"
      "while (input.getBytesUntilLimit() > 0) {\n"
      "  $repeated_add$(input.read$capitalized_type$());\n"
      "}\n"
      "input.popLimit(limit);\n");
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateParsingDoneCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "if ($get_mutable_bit_parser$) {\n"
                 "  $name_make_immutable$; // C\n"
                 "}\n");
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateSerializationCode(
    io::Printer* printer) const {
  if (descriptor_->is_packed()) {
    // We invoke getSerializedSize in writeTo for messages that have packed
    // fields in ImmutableMessageGenerator::GenerateMessageSerializationMethods.
    // That makes it safe to rely on the memoized size here.
    printer->Print(variables_,
                   "if (get$capitalized_name$List().size() > 0) {\n"
                   "  output.writeUInt32NoTag($tag$);\n"
                   "  output.writeUInt32NoTag($name$MemoizedSerializedSize);\n"
                   "}\n"
                   "for (int i = 0; i < $name$_.size(); i++) {\n"
                   "  output.write$capitalized_type$NoTag($repeated_get$(i));\n"
                   "}\n");
  } else {
    printer->Print(
        variables_,
        "for (int i = 0; i < $name$_.size(); i++) {\n"
        "  output.write$capitalized_type$($number$, $repeated_get$(i));\n"
        "}\n");
  }
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateSerializedSizeCode(
    io::Printer* printer) const {
  printer->Print(variables_,
                 "{\n"
                 "  int dataSize = 0;\n");
  printer->Indent();

  if (FixedSize(GetType(descriptor_)) == -1) {
    printer->Print(
        variables_,
        "for (int i = 0; i < $name$_.size(); i++) {\n"
        "  dataSize += com.google.protobuf.CodedOutputStream\n"
        "    .compute$capitalized_type$SizeNoTag($repeated_get$(i));\n"
        "}\n");
  } else {
    printer->Print(
        variables_,
        "dataSize = $fixed_size$ * get$capitalized_name$List().size();\n");
  }

  printer->Print("size += dataSize;\n");

  if (descriptor_->is_packed()) {
    printer->Print(variables_,
                   "if (!get$capitalized_name$List().isEmpty()) {\n"
                   "  size += $tag_size$;\n"
                   "  size += com.google.protobuf.CodedOutputStream\n"
                   "      .computeInt32SizeNoTag(dataSize);\n"
                   "}\n");
  } else {
    printer->Print(
        variables_,
        "size += $tag_size$ * get$capitalized_name$List().size();\n");
  }

  // cache the data size for packed fields.
  if (descriptor_->is_packed()) {
    printer->Print(variables_, "$name$MemoizedSerializedSize = dataSize;\n");
  }

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

void RepeatedImmutablePrimitiveFieldGenerator::GenerateEqualsCode(
    io::Printer* printer) const {
  printer->Print(
      variables_,
      "if (!get$capitalized_name$List()\n"
      "    .equals(other.get$capitalized_name$List())) return false;\n");
}

void RepeatedImmutablePrimitiveFieldGenerator::GenerateHashCode(
    io::Printer* printer) const {
  printer->Print(
      variables_,
      "if (get$capitalized_name$Count() > 0) {\n"
      "  hash = (37 * hash) + $constant_name$;\n"
      "  hash = (53 * hash) + get$capitalized_name$List().hashCode();\n"
      "}\n");
}

std::string RepeatedImmutablePrimitiveFieldGenerator::GetBoxedType() const {
  return BoxedPrimitiveTypeName(GetJavaType(descriptor_));
}

}  // namespace java
}  // namespace compiler
}  // namespace protobuf
}  // namespace google
