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.file;
  
  import org.apache.arrow.dataset.jni.JniLoader;
  
  /**
   * JniWrapper for filesystem based {@link org.apache.arrow.dataset.source.Dataset} implementations.
   */
  public class JniWrapper {
  
    private static final JniWrapper INSTANCE = new JniWrapper();
  
    public static JniWrapper get() {
      JniLoader.get().ensureLoaded();
      return INSTANCE;
    }
  
    private JniWrapper() {}
  
    /**
     * Create FileSystemDatasetFactory and return its native pointer. The pointer is pointing to a
     * intermediate shared_ptr of the factory instance.
     *
     * @param uri file uri to read, either a file or a directory
     * @param fileFormat file format ID.
     * @param serializedFragmentScanOptions serialized FragmentScanOptions.
     * @return the native pointer of the arrow::dataset::FileSystemDatasetFactory instance.
     * @see FileFormat
     */
    public native long makeFileSystemDatasetFactory(
        String uri, int fileFormat, String[] serializedFragmentScanOptions);
  
    /**
     * Create FileSystemDatasetFactory and return its native pointer. The pointer is pointing to a
     * intermediate shared_ptr of the factory instance.
     *
     * @param uris List of file uris to read, each path pointing to an individual file
     * @param fileFormat file format ID.
     * @param serializedFragmentScanOptions serialized FragmentScanOptions.
     * @return the native pointer of the arrow::dataset::FileSystemDatasetFactory instance.
     * @see FileFormat
     */
    public native long makeFileSystemDatasetFactoryWithFiles(
        String[] uris, int fileFormat, String[] serializedFragmentScanOptions);
  
    /**
     * Write the content in a {@link org.apache.arrow.c.ArrowArrayStream} into files. This internally
     * depends on C++ write API: FileSystemDataset::Write.
     *
     * @param streamAddress the ArrowArrayStream address
     * @param fileFormat target file format (ID)
     * @param uri target file uri
     * @param partitionColumns columns used to partition output files
     * @param maxPartitions maximum partitions to be included in written files
     * @param baseNameTemplate file name template used to make partitions. E.g. "dat_{i}", i is
     *     current partition ID around all written files.
     */
    public native void writeFromScannerToFile(
        long streamAddress,
        long fileFormat,
        String uri,
        String[] partitionColumns,
        int maxPartitions,
        String baseNameTemplate);
  }
  