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 com.aliyun.odps.data;
  
  import org.apache.arrow.vector.VectorSchemaRoot;
  
  import java.io.Closeable;
  import java.io.IOException;
  
  public interface ArrowRecordReader extends Closeable {
      /**
       * 读取一个batch的记录
       *
       * @return VectorSchemaRoot 成功读到记录返回{@link VectorSchemaRoot}对象, 读取完成返回null
       * @throws IOException 读取过程发生异常, 发生异常后不可重试
       */
      public VectorSchemaRoot read() throws IOException;
  
      /**
       * 返回读取的字节数
       */
      public long bytesRead();
  }
  