I am building a scanner-upload-to-pdf applet. I can sucessfully scan and
upload Group4 compressed multi-page TIFF files via an applet onto our
application server. I can convert these tiff files using the supplied
Tiff2Pdf.java sample provided.
What I am having trouble doing is placing code to take the compressed tiff
images from a ByteArrayOutputStream (using the jai code from Sun) and extact
each tiff and insert them into a PDF file and then upload that pdf onto our
app server.
I've tried converting the output stream to an input stream and then placing
into a RandomAccessFileOrArray with:
ra = new RandomAccessFileOrArray(new
ByteArrayInputStream(output.toByteArray()));
It appears to get the image ok because it shows the scaled width and height,
but when I get to document.add(img), I get the exception as show below:
Processing: page 1 scaledWidth=2016.0 scaledHeight=2645.0
DocumentException: java.lang.NullPointerException
at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
at java.io.BufferedOutputStream.write(Unknown Source)
at java.io.FilterOutputStream.write(Unknown Source)
at
com.lowagie.text.pdf.OutputStreamCounter.write(OutputStreamCounter.java:107)
at com.lowagie.text.pdf.PdfStream.toPdf(PdfStream.java:270)
at
com.lowagie.text.pdf.PdfIndirectObject.writeTo(PdfIndirectObject.java:167)
at com.lowagie.text.pdf.PdfWriter$PdfBody.add(PdfWriter.java:370)
at com.lowagie.text.pdf.PdfWriter$PdfBody.add(PdfWriter.java:350)
at com.lowagie.text.pdf.PdfWriter$PdfBody.add(PdfWriter.java:303)
at com.lowagie.text.pdf.PdfWriter.addToBody(PdfWriter.java:1851)
at com.lowagie.text.pdf.PdfWriter.add(PdfWriter.java:992)
at
com.lowagie.text.pdf.PdfWriter.addDirectImageSimple(PdfWriter.java:971)
at
com.lowagie.text.pdf.PdfContentByte.addImage(PdfContentByte.java:1015)
at com.lowagie.text.pdf.PdfContentByte.addImage(PdfContentByte.java:977)
at UploadApplet.toPDF(UploadApplet.java:189)
at UploadApplet.init(UploadApplet.java:83)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Any guidance is greatly appreciated.
Regards,
Ken Ricci
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