Migrating from iText 2 and 4

Migrating from iText 2.1.7 and iText 4.2.0

Compatibilty

One goal of LibrePDF is to mantain compatibility with iText, to be a drop-in replacement of iText.

But compatibility is not always possible, so we collect all changes you need to do in your code:

Changes needed in your code

TiffImage

You must depends on twelvemokeys

        <dependency>
            <groupId>com.twelvemonkeys.imageio</groupId>
            <artifactId>imageio-tiff</artifactId>
            <version>3.4.1</version>
        </dependency>

You can use the standard approach

Image tif = Image.getInstance("iText.tif");

but if you need to read a multipage TIFF

old way RandomAccessFileOrArray + TiffImage

        RandomAccessFileOrArray randomAccess = 
             new RandomAccessFileOrArray(
                  file.getAbsolutePath(),
                  false, 
                  Document.plainRandomAccess); 
        int pages = TiffImage.getNumberOfPages(randomAccess);
        for (int i = 1; i <= pages; i++) {
            Image image = TiffImage.getTiffImage(randomAccess, i);
            document.add(image);
        }

new way

    try (ImageInputStream iis = ImageIO.createImageInputStream(file)) {
        ImageReader reader = getTiffImageReader();
        reader.setInput(iis);
        int pages = reader.getNumImages(true);
        for (int imageIndex = 0; imageIndex < pages; imageIndex++) {
            BufferedImage bufferedImage = reader.read(imageIndex);
            Image image = Image.getInstance(bufferedImage, null, false);
            document.add(image);
        }
    }

    private static ImageReader getTiffImageReader() {
        Iterator<ImageReader> imageReaders = ImageIO.getImageReadersByFormatName("TIFF");
        if (!imageReaders.hasNext()) {
            throw new UnsupportedOperationException("No TIFF Reader found!");
        }
        return imageReaders.next();
    }