Examples with Reader com.google.zxing.Reader used on opensource projects

Example 1 with Reader

use of com.google.zxing.Reader in project zxing by zxing.

the class DecodeServlet method processImage.

private static void processImage(BufferedImage image, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
    LuminanceSource source = new BufferedImageLuminanceSource(image);
    BinaryBitmap bitmap = new BinaryBitmap(new GlobalHistogramBinarizer(source));
    Collection<Result> results = new ArrayList<>(1);
    try {
        Reader reader = new MultiFormatReader();
        ReaderException savedException = null;
        try {
            // Look for multiple barcodes
            MultipleBarcodeReader multiReader = new GenericMultipleBarcodeReader(reader);
            Result[] theResults = multiReader.decodeMultiple(bitmap, HINTS);
            if (theResults != null) {
                results.addAll(Arrays.asList(theResults));
            }
        } catch (ReaderException re) {
            savedException = re;
        }
        if (results.isEmpty()) {
            try {
                // Look for pure barcode
                Result theResult = reader.decode(bitmap, HINTS_PURE);
                if (theResult != null) {
                    results.add(theResult);
                }
            } catch (ReaderException re) {
                savedException = re;
            }
        }
        if (results.isEmpty()) {
            try {
                // Look for normal barcode in photo
                Result theResult = reader.decode(bitmap, HINTS);
                if (theResult != null) {
                    results.add(theResult);
                }
            } catch (ReaderException re) {
                savedException = re;
            }
        }
        if (results.isEmpty()) {
            try {
                // Try again with other binarizer
                BinaryBitmap hybridBitmap = new BinaryBitmap(new HybridBinarizer(source));
                Result theResult = reader.decode(hybridBitmap, HINTS);
                if (theResult != null) {
                    results.add(theResult);
                }
            } catch (ReaderException re) {
                savedException = re;
            }
        }
        if (results.isEmpty()) {
            try {
                throw savedException == null ? NotFoundException.getNotFoundInstance() : savedException;
            } catch (FormatException | ChecksumException e) {
                log.info(e.toString());
                errorResponse(request, response, "format");
            } catch (ReaderException e) {
                // Including NotFoundException
                log.info(e.toString());
                errorResponse(request, response, "notfound");
            }
            return;
        }
    } catch (RuntimeException re) {
        // Call out unexpected errors in the log clearly
        log.log(Level.WARNING, "Unexpected exception from library", re);
        throw new ServletException(re);
    }
    String fullParameter = request.getParameter("full");
    boolean minimalOutput = fullParameter != null && !Boolean.parseBoolean(fullParameter);
    if (minimalOutput) {
        response.setContentType(MediaType.PLAIN_TEXT_UTF_8.toString());
        response.setCharacterEncoding(StandardCharsets.UTF_8.name());
        try (Writer out = new OutputStreamWriter(response.getOutputStream(), StandardCharsets.UTF_8)) {
            for (Result result : results) {
                out.write(result.getText());
                out.write('\n');
            }
        }
    } else {
        request.setAttribute("results", results);
        request.getRequestDispatcher("decoderesult.jspx").forward(request, response);
    }
}

Example 2 with Reader

use of com.google.zxing.Reader in project camel by apache.

the class BarcodeTestBase method checkFormat.

private void checkFormat(File file, BarcodeFormat format) throws IOException {
    Reader reader = new MultiFormatReader();
    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(ImageIO.read(file))));
    Result result;
    try {
        result = reader.decode(bitmap);
    } catch (ReaderException ex) {
        throw new IOException(ex);
    }
    assertEquals(format, result.getBarcodeFormat());
}