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.hadoop.readsupport;
  
  import java.io.IOException;
  
  import org.apache.carbondata.core.metadata.schema.table.CarbonTable;
  import org.apache.carbondata.core.metadata.schema.table.column.CarbonColumn;
  
  /**
   * This is the interface to convert data reading from RecordReader to row representation.
   */
  public interface CarbonReadSupport<T> {
  
    /**
     * Initialization if needed based on the projected column list
     *
     * @param carbonColumns column list
     * @param carbonTable table identifier
     */
    default void initialize(CarbonColumn[] carbonColumns, CarbonTable carbonTable)
        throws IOException {
    }
  
    /**
     * convert column data back to row representation
     * @param data column data
     */
    default T readRow(Object[] data) {
      return (T) data;
    }
  
    /**
     * cleanup step if necessary
     */
    default void close() {
    }
  
  }
  