content: /*
   * Copyright 2021 4Paradigm
   *
   * 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 com._4paradigm.openmldb.importer;
  
  import org.apache.commons.csv.CSVFormat;
  import org.apache.commons.csv.CSVParser;
  import org.apache.commons.csv.CSVRecord;
  
  import java.io.FileReader;
  import java.io.IOException;
  import java.io.Reader;
  import java.util.Iterator;
  import java.util.Map;
  
  public class LocalCSVFileReader implements CSVFileReader {
  
      private final Iterator<CSVRecord> iter;
      private final Map<String, Integer> headerMap;
  
      public LocalCSVFileReader(String filePath) throws IOException {
          Reader in = new FileReader(filePath);
          CSVFormat format = CSVFormat.Builder.create().setHeader().build();
          CSVParser parser = format.parse(in);
          iter = parser.iterator();
          headerMap = parser.getHeaderMap();
      }
  
      @Override
      public boolean hasNext() {
          return iter.hasNext();
      }
  
      @Override
      public CSVRecord next() {
          return iter.next();
      }
  
      @Override
      public Map<String, Integer> getHeader() {
          return headerMap;
      }
  }
  