Introducing PSPDFKit Libraries

// Open a document to append a cover page to and create a Document Editor from it.
File file = new File("Assets/default.pdf");
PdfDocument document = new PdfDocument(new FileDataProvider(file));
DocumentEditor documentEditor = document.createDocumentEditor();

// Prepend the document with the cover page.
File coverPage = new File("Assets/coverPage.pdf");
documentEditor.importDocument(0, DocumentEditor.IndexPosition.BeforeIndex, new FileDataProvider(coverPage));

// Save the document to an output file.
File outputFile = File.createTempFile("documentWithCoverPage", ".pdf");
documentEditor.saveDocument(new FileDataProvider(outputFile));

// Open a document to append a cover page to and create a Document Editor from it.
var document = new Document(new FileDataProvider("Assets/default.pdf"));
var documentEditor = document.CreateDocumentEditor();

// Prepend the document with the cover page.
documentEditor.ImportDocument(0, DocumentEditor.IndexPosition.BeforeIndex,
    new FileDataProvider("Assets/coverPage.pdf"));

// Save the document to an output file.
const string filename = "documentWithCoverPage.pdf";
File.Create(filename).Close(); // Create the file and close it to ensure it is not used by this process.
documentEditor.SaveDocument(new FileDataProvider(filename));

// Open the document you want to render.
File file = new File("Assets/default.pdf");
PdfDocument document = new PdfDocument(new FileDataProvider(file));

for (int i = 0; i < document.getPageCount(); i++) {
    // Render a thumbnail for each page.
    PdfPage page = document.getPage(i);
    BufferedImage bufferedImage = page.renderPage(120, 170);

    // Write the render out to a PNG.
    File outputFile = File.createTempFile("page" + i, ".pdf");
    ImageIO.write(bufferedImage, "png", outputFile);
}

// Open the document you want to render.
var document = new Document(new FileDataProvider("Assets/default.pdf"));

for (uint i = 0; i < document.GetPageCount(); i++) {
    // Render a thumbnail for each page.
    var page = document.GetPage(i);
    var bitmap = page.RenderPage(120, 170);

    // Write the render out to a PNG.
    bitmap.Save("page" + i + ".pdf", ImageFormat.Png);
}

// Open the document to apply the Instant Document JSON to.
File documentFile = new File("Assets/default.pdf");
PdfDocument document = new PdfDocument(new FileDataProvider(documentFile));

// Open the Instant document JSON and apply to the document.
File instantFile = new File("Assets/instant.json");
document.importDocumentJson(new FileDataProvider(instantFile));

// Open the document to apply the Instant Document JSON to.
var document = new Document(new FileDataProvider("Assets/default.pdf"));

// Open the Instant document JSON and apply to the document.
document.ImportDocumentJson(new FileDataProvider("Assets/instant.json"));

// Define the redaction annotation to use.
JSONObject redactionAnnotation = new JSONObject();
redactionAnnotation.put("bbox", new float[]{337.77972412109375f, 121.1519775390625f, 166.67999267578125f, 45.39599609375f});
redactionAnnotation.put("creatorName", "User");
redactionAnnotation.put("fillColor", "#000000");
redactionAnnotation.put("opacity", 1);
redactionAnnotation.put("pageIndex", 0);
redactionAnnotation.put("type", "pspdfkit/markup/redaction");
redactionAnnotation.put("v", 1);

// Open each file and apply the same redaction annotation. Upon saving, apply the redactions.
for (File fileToRedact : filesToRedact) {
    PdfDocument document = new PdfDocument(new FileDataProvider(fileToRedact));
    document.getAnnotationProvider().addAnnotationJson(redactionAnnotation);
    document.save(new DocumentSaveOptions.Builder().applyRedactionAnnotations(true).build());
}

// Define the redaction annotation to use.
var redactionAnnotation = new JObject
{
    {
        "bbox",
        new JArray {337.77972412109375f, 121.1519775390625f, 166.67999267578125f, 45.39599609375f}
    },
    {"creatorName", "User"},
    {"fillColor", "#000000"},
    {"opacity", 1},
    {"pageIndex", 0},
    {"type", "pspdfkit/markup/redaction"},
    {"v", 1}
};

// Open each file and apply the same redaction annotation. Upon saving, apply the redactions.
foreach (var fileToRedact in filesToRedact)
{
    var document = new Document(new FileDataProvider(fileToRedact));
    document.GetAnnotationProvider().AddAnnotationJson(redactionAnnotation);
    document.Save(new DocumentSaveOptions
    {
        applyRedactionAnnotations = true
    });
}

// Open the document.
File file = new File("Assets/default.pdf");
PdfDocument document = new PdfDocument(new FileDataProvider(file));

// Open and import the redaction annotations from the Instant Document JSON.
File redactionJsonFile = new File("Assets/redaction.json");
document.importDocumentJson(new FileDataProvider(redactionJsonFile));

// Save the document with the redaction annotations applied.
document.save(new DocumentSaveOptions.Builder().applyRedactionAnnotations(true).build());

// Open the document.
var document = new Document(new FileDataProvider(tempPath));

// Open and import the redaction annotations from the Instant Document JSON.
document.ImportDocumentJson(new FileDataProvider("Assets/redaction.json"));

// Save the document with the redaction annotations applied.
document.Save(new DocumentSaveOptions
{
    applyRedactionAnnotations = true,
});

// Open the document.
File file = new File("default.pdf");
PdfDocument document = new PdfDocument(new FileDataProvider(file));

// Save and flatten the annotations in the document.
document.save(new DocumentSaveOptions.Builder().flattenAnnotations(true).build());

// Open the document.
var document = new Document(new FileDataProvider("default.pdf"));

// Save and flatten the annotations in the document.
document.Save(new DocumentSaveOptions
{
    flattenAnnotations = true
});