public String getHashedMXPImage(final Map<String, String> H, final String key)
	{
		if(H==null)
			return "";
		final String s=H.get(key);
		if(s==null)
			return null;
		if(s.trim().length()==0)
			return null;
		if(s.equalsIgnoreCase("NULL"))
			return "";
		return s;
	}

	@Override @SuppressWarnings({"unchecked","rawtypes"}