content: /*
   * Copyright 2002-2019 Drew Noakes and contributors
   *
   *    Licensed 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
   *
   *        https://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.
   *
   * More information about this project is available at:
   *
   *    https://drewnoakes.com/code/exif/
   *    https://github.com/drewnoakes/metadata-extractor
   */
  package com.drew.metadata.jpeg;
  
  import com.drew.imaging.jpeg.JpegSegmentMetadataReader;
  import com.drew.imaging.jpeg.JpegSegmentType;
  import com.drew.lang.annotations.NotNull;
  import com.drew.metadata.Metadata;
  import com.drew.metadata.StringValue;
  
  import java.util.Collections;
  
  /**
   * Decodes the comment stored within JPEG files, populating a {@link Metadata} object with tag values in a
   * {@link JpegCommentDirectory}.
   *
   * @author Drew Noakes https://drewnoakes.com
   */
  public class JpegCommentReader implements JpegSegmentMetadataReader
  {
      @NotNull
      public Iterable<JpegSegmentType> getSegmentTypes()
      {
          return Collections.singletonList(JpegSegmentType.COM);
      }
  
      public void readJpegSegments(@NotNull Iterable<byte[]> segments, @NotNull Metadata metadata, @NotNull JpegSegmentType segmentType)
      {
          for (byte[] segmentBytes : segments) {
              JpegCommentDirectory directory = new JpegCommentDirectory();
              metadata.addDirectory(directory);
  
              // The entire contents of the directory are the comment
              directory.setStringValue(JpegCommentDirectory.TAG_COMMENT, new StringValue(segmentBytes, null));
          }
      }
  }
  