Security Annotations using Java

Mark text for redaction

1. Load the PDF and search all pages for the text that should be redacted.
2. Create a RedactionAnnotation for each matched text fragment and configure its appearance.
3. Add the redaction annotations to their pages and save the document.

public static void markTextRedaction(Path inputFile, Path outputFile, String searchTerm) {
    try (Document document = new Document(inputFile.toString())) {
        TextFragmentAbsorber textFragmentAbsorber = new TextFragmentAbsorber(searchTerm);
        TextSearchOptions textSearchOptions = new TextSearchOptions(true);
        textFragmentAbsorber.setTextSearchOptions(textSearchOptions);
        document.getPages().accept(textFragmentAbsorber);

        for (TextFragment textFragment : textFragmentAbsorber.getTextFragments()) {
            Page page = textFragment.getPage();
            Rectangle annotationRectangle = textFragment.getRectangle();
            RedactionAnnotation annotation = new RedactionAnnotation(page, annotationRectangle);
            annotation.setFillColor(Color.getGray());
            annotation.setBorderColor(Color.getRed());
            annotation.setColor(Color.getWhite());
            annotation.setOverlayText("REDACTED");
            annotation.setTextAlignment(HorizontalAlignment.Center);
            annotation.setRepeat(true);
            page.getAnnotations().add(annotation, true);
        }

        document.save(outputFile.toString());
    }
}