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https://issues.apache.org/jira/browse/PDFBOX-3566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ceakki updated PDFBOX-3566:
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Summary: ClassCastException in JPEGFactory.createFromImage() (was:
ClassCastException in JPEGFactory.createFromImage)
> ClassCastException in JPEGFactory.createFromImage()
> ---------------------------------------------------
>
> Key: PDFBOX-3566
> URL: https://issues.apache.org/jira/browse/PDFBOX-3566
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.3
> Environment: Linux OS, Java 1.8, Oracle Java Advanced Imaging (JAI)
> installed.
> Reporter: ceakki
>
> I was trying to save all the pages from a PDF as images and adding them to a
> newly created PDF.
> {code}
> PDDocument newDoc = new PDDocument();
> PDFRenderer pdfRenderer = new PDFRenderer(oldDoc);
> floag width = ...
> float height = ...
> page.setMediaBox(new PDRectangle(width, height));
> newDoc.addPage(page);
> PDPageContentStream contents = new PDPageContentStream(newDoc, page);
> BufferedImage bufferedImage = pdfRenderer.renderImageWithDPI(0, 200,
> ImageType.RGB);
> PDImageXObject imageXObject = JPEGFactory.createFromImage(newDoc,
> bufferedImage, 0.75);
> contents.drawImage(imageXObject, 0, 0, width, height);
> contents.close();
> ...
> {code}
> Sometimes it's working just fine, sometimes it's trowing a ClassCastException
> in JPEGFactory.createFromImage:
> {noformat}
> java.lang.ClassCastException:
> com.sun.media.imageioimpl.plugins.jpeg.CLibJPEGImageWriteParam cannot be cast
> to javax.imageio.plugins.jpeg.JPEGImageWriteParam
> at
> org.apache.pdfbox.pdmodel.graphics.image.JPEGFactory.encodeImageToJPEGStream(JPEGFactory.java:244)
> at
> org.apache.pdfbox.pdmodel.graphics.image.JPEGFactory.createJPEG(JPEGFactory.java:212)
> at
> org.apache.pdfbox.pdmodel.graphics.image.JPEGFactory.createFromImage(JPEGFactory.java:175)
> at
> org.apache.pdfbox.pdmodel.graphics.image.JPEGFactory.createFromImage(JPEGFactory.java:160)
> at
> com.mimecast.ttpservice.app.jpati.ConvertPDF.saveDoc(ConvertPDF.java:1390)
> {noformat}
> This is happening in the following code of above mentioned class:
> {code}
> imageWriter = ImageIO.getImageWritersBySuffix("jpeg").next();
> ...
> JPEGImageWriteParam jpegParam =
> (JPEGImageWriteParam)imageWriter.getDefaultWriteParam();
> {code}
> In my case I can get more than one ImageWritter when calling
> *ImageIO.getImageWritersBySuffix("jpeg")* as follows:
> {noformat}
> com.sun.imageio.plugins.jpeg.JPEGImageWriter
> com.sun.media.imageioimpl.plugins.jpeg.CLibJPEGImageWriter
> {noformat}
> I suspect that sometimes the *CLibJPEGImageWriter* is returned before
> *JPEGImageWriter*, which produces the ClassCastException a bit later.
> As I need to keep the JAI installed, is it possible to change the above code
> to loop through all ImageWriters found in order to pick the one needed by
> PdfBox?
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