@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((crc32 == null) ? 0 : crc32.hashCode());
		result = prime * result + (int) (fileSize ^ (fileSize >>> 32));
		result = prime * result
				+ ((imageAttributes == null) ? 0 : imageAttributes.hashCode());
		return result;
	}