How to combine OCR with redaction in Java

PdfDocument document = PdfDocument.open(new FileDataProvider(new File("/path/to/JeffsLetter.pdf")));
FileDataProvider ocrProcessedFile = new FileDataProvider(new File("/tmp/JeffsLetterWithOCR.pdf"));

OcrProcessor ocrProcessor = new OcrProcessor.Builder(document).build();
ocrProcessor.performOcr(ocrProcessedFile);

// We can reuse the `document` object we created from the previous section to reload the OCR processed document.
document = PdfDocument.open(ocrProcessedFile);
// And then we redact any email addresses or international phone numbers found in the letter.
RedactionProcessor.create()
    .addRedactionTemplates(new RedactionPreset.Builder(RedactionPreset.Type.EMAIL_ADDRESS).build())
    .addRedactionTemplates(new RedactionPreset.Builder(RedactionPreset.Type.INTERNATIONAL_PHONE_NUMBER).build())
    .redact(document);

/**
 * A function that takes an input and output file path along with OCR language,
 * performs OCR on the input document, outputs it to `outputFile` path, and returns a
 * processed document for further use.
 */
@Nullable
public PdfDocument performOcrAndReturnProcessedDocument(@NotNull final String inputFile,
                                                        @NotNull final String outputFile,
                                                        @NotNull final OcrLanguage language) {
    try {
        PdfDocument document = PdfDocument.open(new FileDataProvider(new File(inputFile)));
        FileDataProvider ocrProcessedFile = new FileDataProvider(new File(outputFile));

        OcrProcessor ocrProcessor = new OcrProcessor.Builder(document)
                .setLanguage(language)
                .build();

        ocrProcessor.performOcr(ocrProcessedFile);

        // Log where our output file goes so we can easily find it.
        System.out.println("OCR processed file outputted to " + ocrProcessedFile.getFile().getAbsolutePath());

        // Reopen the processed file so we have access to the OCR metadata.
        return PdfDocument.open(ocrProcessedFile);
    } catch (IOException | PSPDFKitInitializeException e) {
        e.printStackTrace();
    }
    return null;
}

// Our main function performs OCR and then redacts the text from the image.
public void main() {
    final PdfDocument document = performOcrAndReturnProcessedDocument(
        "/path/to/JeffsLetter.pdf",
        "/tmp/JeffsLetterProcessed.pdf",
        OcrLanguage.English);

    // If the OCR was successful, we'll have a valid `document` to redact.
    if (document != null) {
        try {
            RedactionProcessor.create()
                .addRedactionTemplates(new RedactionPreset.Builder(RedactionPreset.Type.EMAIL_ADDRESS).build())
                .addRedactionTemplates(new RedactionPreset.Builder(RedactionPreset.Type.INTERNATIONAL_PHONE_NUMBER).build())
                .redact(document);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}