Sanitizing a byte steam in Java

private InputStream sanitizeStream(InputStream in) throws IOException{

	BufferedInputStream bis = new BufferedInputStream(in);
	OutputStream output = new ByteArrayOutputStream();

	//Sanitize input stream
	int ch;
	while ((ch = bis.read()) != -1) {

		if ((ch == 0x9) || (ch == 0xA) || (ch == 0xD)
		    || ((ch >= 0x20) && (ch = 0xE000) && (ch = 0x10000) && (ch <= 0x10FFFF))) {

			output.write((int) ch);
		}

	}

	InputStream decodedInput = new ByteArrayInputStream(
			((ByteArrayOutputStream) output).toByteArray());

	return decodedInput;
}