code: /*
   * Copyright 2015 recommenders.net.
   *
   * 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.
   */
  package net.recommenders.rival.core;
  
  import java.io.File;
  import java.io.IOException;
  
  /**
   * Parser of files where users or items are not represented as integer ids.
   *
   * @author <a href="http://github.com/abellogin">Alejandro</a>
   *
   * @param <U> generic type of users
   * @param <I> generic type of items
   */
  public interface ParserWithIdMapping<U, I> extends Parser<U, I> {
  
      /**
       * Parse a temporal data file.
       *
       * @param f The file to be parsed.
       * @param mapIdsPrefix The prefix of the file where the id mapping will be
       * stored (and will be read from).
       * @return A dataset created from the file.
       * @throws IOException if the file cannot be read.
       */
      TemporalDataModelIF<U, I> parseTemporalData(File f, String mapIdsPrefix) throws IOException;
  
      /**
       * Parse data file.
       *
       * @param f The file to parse.
       * @param mapIdsPrefix The prefix of the file where the id mapping will be
       * stored (and will be read from).
       * @return The data model created from the file.
       * @throws IOException if the file cannot be read.
       */
      DataModelIF<U, I> parseData(File f, String mapIdsPrefix) throws IOException;
  }
  