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.core.mutate.DeleteDeltaBlockDetails;
  
  /**
   * CarbonDeleteDeltaFileReader contains all methods to read delete delta file data
   */
  public interface CarbonDeleteDeltaFileReader {
  
    /**
     * This method will be used to read complete delete delta file.
     * scenario:
     * Whenever a query is executed then read the delete delta file
     * and exclude the deleted data.
     *
     * @return All deleted records for specified block
     * @throws IOException if an I/O error occurs
     */
    String read() throws IOException;
  
    DeleteDeltaBlockDetails readJson();
  
  }
  