content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.carbondata.core.reader;
  
  import java.io.IOException;
  
  import org.apache.carbondata.format.BlockIndex;
  import org.apache.carbondata.format.IndexHeader;
  
  import org.apache.hadoop.conf.Configuration;
  
  /**
   * Reader class which will be used to read the index file
   */
  public class CarbonIndexFileReader {
  
    private Configuration configuration;
  
    public CarbonIndexFileReader() {
  
    }
  
    public CarbonIndexFileReader(Configuration configuration) {
      this.configuration = configuration;
    }
  
    /**
     * reader
     */
    private ThriftReader thriftReader;
  
    /**
     * Below method will be used to read the index header
     *
     * @return index header
     * @throws IOException if any problem  while reader the header
     */
    public IndexHeader readIndexHeader() throws IOException {
      return (IndexHeader) thriftReader.read(IndexHeader::new);
    }
  
    /**
     * Below method will be used to close the reader
     */
    public void closeThriftReader() {
      thriftReader.close();
    }
  
    /**
     * Below method will be used to read the block index from fie
     *
     * @return block index info
     * @throws IOException if problem while reading the block index
     */
    public BlockIndex readBlockIndexInfo() throws IOException {
      return (BlockIndex) thriftReader.read(BlockIndex::new);
    }
  
    /**
     * Open the thrift reader
     *
     * @param filePath
     * @throws IOException
     */
    public void openThriftReader(String filePath) throws IOException {
      thriftReader = new ThriftReader(filePath, configuration);
      thriftReader.open();
    }
  
    /**
     * Open the thrift reader
     *
     * @param fileData
     */
    public void openThriftReader(byte[] fileData) {
      thriftReader = new ThriftReader(fileData);
    }
  
    /**
     * check if any more object is present
     *
     * @return true if any more object can be read
     * @throws IOException
     */
    public boolean hasNext() throws IOException {
      return thriftReader.hasNext();
    }
  }
  