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.arrow.dataset.scanner;
  
  import org.apache.arrow.vector.ipc.ArrowReader;
  import org.apache.arrow.vector.types.pojo.Schema;
  
  /** A high level interface for scanning data over dataset. */
  public interface Scanner extends AutoCloseable {
  
    /**
     * Read the dataset as a stream of record batches.
     *
     * @return a {@link ArrowReader}.
     */
    ArrowReader scanBatches();
  
    /**
     * Perform the scan operation.
     *
     * @return a iterable set of {@link ScanTask}s. Each task is considered independent and it is
     *     allowed to execute the tasks concurrently to gain better performance.
     * @deprecated use {@link #scanBatches()} instead.
     */
    @Deprecated
    Iterable<? extends ScanTask> scan();
  
    /**
     * Get the schema of this Scanner.
     *
     * @return the schema instance
     */
    Schema schema();
  }
  