// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://code.google.com/p/protobuf/
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//     * Redistributions of source code must retain the above copyright
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// in the documentation and/or other materials provided with the
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// Author: bduff@google.com (Brian Duff)

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

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

using internal::WireFormat;

void SetVariables(const FieldDescriptor* descriptor, const Params params,
                  map<string, string>* variables) {
  (*variables)["name"] = 
    RenameJavaKeywords(UnderscoresToCamelCase(descriptor));
  (*variables)["number"] = SimpleItoa(descriptor->number());
  (*variables)["extends"] = ClassName(params, descriptor->containing_type());

  string type;
  JavaType java_type = GetJavaType(descriptor->type());
  switch (java_type) {
    case JAVATYPE_ENUM:
      type = "java.lang.Integer";
      break;
    case JAVATYPE_MESSAGE:
      type = ClassName(params, descriptor->message_type());
      break;
    default:
      type = BoxedPrimitiveTypeName(java_type);
      break;
  }
  (*variables)["type"] = type;
}

ExtensionGenerator::
ExtensionGenerator(const FieldDescriptor* descriptor, const Params& params)
  : params_(params), descriptor_(descriptor) {
  SetVariables(descriptor, params, &variables_);
}

ExtensionGenerator::~ExtensionGenerator() {}

void ExtensionGenerator::Generate(io::Printer* printer) const {
  if (descriptor_->is_repeated()) {
    printer->Print(variables_,
      "// Extends $extends$\n"
      "public static final com.google.protobuf.nano.Extension<java.util.List<$type$>> $name$ = \n"
      "    com.google.protobuf.nano.Extension.createRepeated($number$,\n"
      "        new com.google.protobuf.nano.Extension.TypeLiteral<java.util.List<$type$>>(){});\n");
  } else {
    printer->Print(variables_,
      "// Extends $extends$\n"
      "public static final com.google.protobuf.nano.Extension<$type$> $name$ =\n"
      "    com.google.protobuf.nano.Extension.create($number$,\n"
      "        new com.google.protobuf.nano.Extension.TypeLiteral<$type$>(){});\n");
  }
}

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