Used version: pdfbox-0.8.0
Hi,
I'm trying to generate a RubberStamp with a custom appearance in a PDF,
using the pdfbox. I wrote the following test-code, but it throws an
exception at the line, where I am trying to save the document. After
testing and searching for a whole day, I could not find any example nor
do I have any further ideas.
Please give me a hint, how I can give a RubberStamp a custom apperance,
using an external jpg (that should be included in the PDF afterwards).
Here is the test-code I wrote:
(I came to this solution by analyzing the structure of a manually set
custom RubberStamp)
------------ Used test code ------------
//Generating a new document and adding a new page
PDDocument document = new PDDocument();
PDPage page = new PDPage();
document.addPage(page);
//Get all annotations
List annotations = page.getAnnotations();
//Generate a new RubberStamp
PDAnnotationRubberStamp aRubber = new PDAnnotationRubberStamp();
aRubber.setName("fancy_name");
aRubber.setContents("This is the content of the generated stamp!");
//Generate a custom appearance for the RubberStamp
FileInputStream fin = new FileInputStream("fancyImage.jpg");
PDJpeg mypic = new PDJpeg(document,fin);
PDResources myResources = new PDResources();
myResources.getXObjects().put("Im0", mypic);
COSStream s = new COSStream(document.getDocument().getScratchFile());
PDAppearanceStream myDic = new PDAppearanceStream(s);
myDic.setResources(myResources);
PDAppearanceDictionary appearance = new PDAppearanceDictionary(new
COSDictionary());
appearance.setNormalAppearance(new HashMap<String, COSObjectable>());
appearance.getNormalAppearance().put("default", myDic);
//Set the appearance of the RubberStamp to the custom look
aRubber.setAppearance(appearance);
//Define and set the target rectangle
PDRectangle myrect = new PDRectangle();
myrect.setUpperRightX(250);
myrect.setUpperRightY(550);
myrect.setLowerLeftX(275);
myrect.setLowerLeftY(575);
aRubber.setRectangle(myrect);
//Add the new RubberStamp to the document
annotations.add(aRubber);
// Finally write the new file and close it
document.save("output_final.pdf");
document.close();
------------ /Used test code ------------
When running the code, I get the following excpetion:
------------ Exception ------------
Exception in thread "main" org.apache.pdfbox.exceptions.COSVisitorException
at
org.apache.pdfbox.pdfwriter.COSWriter.visitFromStream(COSWriter.java:939)
at org.apache.pdfbox.cos.COSStream.accept(COSStream.java:201)
at
org.apache.pdfbox.pdfwriter.COSWriter.doWriteObject(COSWriter.java:430)
at org.apache.pdfbox.pdfwriter.COSWriter.doWriteBody(COSWriter.java:361)
at
org.apache.pdfbox.pdfwriter.COSWriter.visitFromDocument(COSWriter.java:768)
at org.apache.pdfbox.cos.COSDocument.accept(COSDocument.java:379)
at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1070)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:893)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:874)
at Annotation.main(Annotation.java:177)
java.lang.NullPointerException
at org.apache.pdfbox.cos.COSStream.getFilteredStream(COSStream.java:136)
at
org.apache.pdfbox.pdfwriter.COSWriter.visitFromStream(COSWriter.java:913)
at org.apache.pdfbox.cos.COSStream.accept(COSStream.java:201)
at
org.apache.pdfbox.pdfwriter.COSWriter.doWriteObject(COSWriter.java:430)
at org.apache.pdfbox.pdfwriter.COSWriter.doWriteBody(COSWriter.java:361)
at
org.apache.pdfbox.pdfwriter.COSWriter.visitFromDocument(COSWriter.java:768)
at org.apache.pdfbox.cos.COSDocument.accept(COSDocument.java:379)
at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1070)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:893)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:874)
at Annotation.main(Annotation.java:177)
------------ /Exception ------------
Thanks for all your help!
Greetings,
Erik
