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: kenton@google.com (Kenton Varda)
  //  Based on original Protocol Buffers design by
  //  Sanjay Ghemawat, Jeff Dean, and others.
  
  #include <map>
  
  #include <google/protobuf/compiler/java/java_context.h>
  #include <google/protobuf/compiler/java/java_enum_lite.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/io/printer.h>
  #include <google/protobuf/descriptor.pb.h>
  #include <google/protobuf/stubs/strutil.h>
  
  namespace google {
  namespace protobuf {
  namespace compiler {
  namespace java {
  
  EnumLiteGenerator::EnumLiteGenerator(const EnumDescriptor* descriptor,
                                       bool immutable_api, Context* context)
      : descriptor_(descriptor),
        immutable_api_(immutable_api),
        context_(context),
        name_resolver_(context->GetNameResolver()) {
    for (int i = 0; i < descriptor_->value_count(); i++) {
      const EnumValueDescriptor* value = descriptor_->value(i);
      const EnumValueDescriptor* canonical_value =
        descriptor_->FindValueByNumber(value->number());
  
      if (value == canonical_value) {
        canonical_values_.push_back(value);
      } else {
        Alias alias;
        alias.value = value;
        alias.canonical_value = canonical_value;
        aliases_.push_back(alias);
      }
    }
  }
  
  EnumLiteGenerator::~EnumLiteGenerator() {}
  
  void EnumLiteGenerator::Generate(io::Printer* printer) {
    WriteEnumDocComment(printer, descriptor_);
    MaybePrintGeneratedAnnotation(context_, printer, descriptor_, immutable_api_);
    printer->Print(
        "public enum $classname$\n"
        "    implements com.google.protobuf.Internal.EnumLite {\n",
        "classname", descriptor_->name());
    printer->Annotate("classname", descriptor_);
    printer->Indent();
  
    for (int i = 0; i < canonical_values_.size(); i++) {
      std::map<string, string> vars;
      vars["name"] = canonical_values_[i]->name();
      vars["number"] = SimpleItoa(canonical_values_[i]->number());
      WriteEnumValueDocComment(printer, canonical_values_[i]);
      if (canonical_values_[i]->options().deprecated()) {
        printer->Print("@java.lang.Deprecated\n");
      }
      printer->Print(vars,
        "$name$($number$),\n");
      printer->Annotate("name", canonical_values_[i]);
    }
  
    if (SupportUnknownEnumValue(descriptor_->file())) {
      printer->Print("${$UNRECOGNIZED$}$(-1),\n", "{", "", "}", "");
      printer->Annotate("{", "}", descriptor_);
    }
  
    printer->Print(
      ";\n"
      "\n");
  
    // -----------------------------------------------------------------
  
    for (int i = 0; i < aliases_.size(); i++) {
      std::map<string, string> vars;
      vars["classname"] = descriptor_->name();
      vars["name"] = aliases_[i].value->name();
      vars["canonical_name"] = aliases_[i].canonical_value->name();
      WriteEnumValueDocComment(printer, aliases_[i].value);
      printer->Print(vars,
        "public static final $classname$ $name$ = $canonical_name$;\n");
      printer->Annotate("name", aliases_[i].value);
    }
  
    for (int i = 0; i < descriptor_->value_count(); i++) {
      std::map<string, string> vars;
      vars["name"] = descriptor_->value(i)->name();
      vars["number"] = SimpleItoa(descriptor_->value(i)->number());
      vars["{"] = "";
      vars["}"] = "";
      WriteEnumValueDocComment(printer, descriptor_->value(i));
      printer->Print(vars,
        "public static final int ${$$name$_VALUE$}$ = $number$;\n");
      printer->Annotate("{", "}", descriptor_->value(i));
    }
    printer->Print("\n");
  
    // -----------------------------------------------------------------
  
    printer->Print(
        "\n"
        "public final int getNumber() {\n");
    if (SupportUnknownEnumValue(descriptor_->file())) {
      printer->Print(
          "  if (this == UNRECOGNIZED) {\n"
          "    throw new java.lang.IllegalArgumentException(\n"
          "        \"Can't get the number of an unknown enum value.\");\n"
          "  }\n");
    }
    printer->Print(
        "  return value;\n"
        "}\n"
        "\n"
        "/**\n"
        " * @deprecated Use {@link #forNumber(int)} instead.\n"
        " */\n"
        "@java.lang.Deprecated\n"
        "public static $classname$ valueOf(int value) {\n"
        "  return forNumber(value);\n"
        "}\n"
        "\n"
        "public static $classname$ forNumber(int value) {\n"
        "  switch (value) {\n",
        "classname", descriptor_->name());
    printer->Indent();
    printer->Indent();
  
    for (int i = 0; i < canonical_values_.size(); i++) {
      printer->Print(
        "case $number$: return $name$;\n",
        "name", canonical_values_[i]->name(),
        "number", SimpleItoa(canonical_values_[i]->number()));
    }
  
    printer->Outdent();
    printer->Outdent();
    printer->Print(
      "    default: return null;\n"
      "  }\n"
      "}\n"
      "\n"
      "public static com.google.protobuf.Internal.EnumLiteMap<$classname$>\n"
      "    internalGetValueMap() {\n"
      "  return internalValueMap;\n"
      "}\n"
      "private static final com.google.protobuf.Internal.EnumLiteMap<\n"
      "    $classname$> internalValueMap =\n"
      "      new com.google.protobuf.Internal.EnumLiteMap<$classname$>() {\n"
      "        public $classname$ findValueByNumber(int number) {\n"
      "          return $classname$.forNumber(number);\n"
      "        }\n"
      "      };\n"
      "\n",
      "classname", descriptor_->name());
  
    printer->Print(
      "private final int value;\n\n"
      "private $classname$(int value) {\n",
      "classname", descriptor_->name());
    printer->Print(
      "  this.value = value;\n"
      "}\n");
  
    printer->Print(
      "\n"
      "// @@protoc_insertion_point(enum_scope:$full_name$)\n",
      "full_name", descriptor_->full_name());
  
    printer->Outdent();
    printer->Print("}\n\n");
  }
  
  bool EnumLiteGenerator::CanUseEnumValues() {
    if (canonical_values_.size() != descriptor_->value_count()) {
      return false;
    }
    for (int i = 0; i < descriptor_->value_count(); i++) {
      if (descriptor_->value(i)->name() != canonical_values_[i]->name()) {
        return false;
      }
    }
    return true;
  }
  
  }  // namespace java
  }  // namespace compiler
  }  // namespace protobuf
  }  // namespace google
  