How to use

getImageInputStream

method

in

com.atlassian.core.util.thumbnail.ThumbnailUtil

public BufferedImage scaleImage(int maxWidth, int maxHeight, InputStream imageStream) throws IOException {
  final ImageInputStream imageInputStream = ThumbnailUtil.getImageInputStream(imageStream);
  try {
    return scaleImage(maxWidth, maxHeight, imageInputStream);
  } finally {
    imageInputStream.close();
  }
}

public static ThumbnailDimension dimensionsForImage(final @Nonnull InputStream inputStream) throws IOException {
  final BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream);
  try {
    final ImageInputStream imageInputStream = getImageInputStream(inputStream);
    try {
      final Optional<ImageReader> imageReader = getFirstImageReader(imageInputStream);
      if (!imageReader.isPresent()) {
        throw new IOException("There is no ImageReader available for the given ImageInputStream");
      }
      // Use the first one available
      final ImageReader reader = imageReader.get();
      try {
        reader.setInput(imageInputStream);
        return new ThumbnailDimension(reader.getWidth(0), reader.getHeight(0));
      } finally {
        reader.dispose();
      }
    } finally {
      imageInputStream.close();
    }
  } finally {
    IOUtils.closeQuietly(bufferedInputStream);
  }
}