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.vector.ipc;
  
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  import java.util.Arrays;
  
  /**
   * Magic header/footer helpers for {@link ArrowFileWriter} and {@link ArrowFileReader} formatted
   * files.
   */
  class ArrowMagic {
    private ArrowMagic() {}
  
    private static final byte[] MAGIC = "ARROW1".getBytes(StandardCharsets.UTF_8);
  
    public static final int MAGIC_LENGTH = MAGIC.length;
  
    public static void writeMagic(WriteChannel out, boolean align) throws IOException {
      out.write(MAGIC);
      if (align) {
        out.align();
      }
    }
  
    public static boolean validateMagic(byte[] array) {
      return Arrays.equals(MAGIC, array);
    }
  }
  