src/pagespeed/kernel/base/json_writer.cc

/*
 * Copyright 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Author: ksimbili@google.com (Kishore Simbili)

#include "pagespeed/kernel/base/json_writer.h"

#include "pagespeed/kernel/base/json.h"
#include "pagespeed/kernel/base/string.h"
#include "pagespeed/kernel/base/string_util.h"

namespace net_instaweb {

class MessageHandler;

JsonWriter::JsonWriter(Writer* writer,
                       const std::vector<ElementJsonPair>* element_json_stack)
    : writer_(writer),
      element_json_stack_(element_json_stack) {
}

JsonWriter::~JsonWriter() {
}

bool JsonWriter::Write(const StringPiece& str,
                       MessageHandler* message_handler) {
  str.AppendToString(&buffer_);
  return true;
}

void JsonWriter::UpdateDictionary() {
  Json::Value& dictionary = *(element_json_stack_->back().second);
  if (!dictionary.isMember(kInstanceHtml)) {
    dictionary[kInstanceHtml] = "";
  }
  const GoogleString& updated_instance_html =
        StrCat(dictionary[kInstanceHtml].asCString(), buffer_);
  dictionary[kInstanceHtml] = updated_instance_html.c_str();
  buffer_.clear();
}

bool JsonWriter::Flush(MessageHandler* message_handler) {
  return writer_->Flush(message_handler);
}

}  // namespace net_instaweb