[
https://issues.apache.org/jira/browse/PDFBOX-4814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17084818#comment-17084818
]
Andreas Küllinger commented on PDFBOX-4814:
-------------------------------------------
There is my easy code to reproduce it with merge utility:
package pdfboxtest;
import java.io.File;
import org.apache.pdfbox.multipdf.PDFMergerUtility;
import org.apache.pdfbox.pdmodel.PDDocument;
public class Test2
{
public static void main(String[] args)
{
File f1 = new File("C:\\PDFnoocg.pdf");
File f2 = new File("C:\\PDFocg1.pdf");
File f3 = new File("C:\\PDFocg2.pdf");
File fr = new File("C:\\merged.pdf");
try {
PDFMergerUtility merge = new PDFMergerUtility();
PDDocument pd1 = PDDocument.load(f1);
PDDocument pd2 = PDDocument.load(f2);
PDDocument pd3 = PDDocument.load(f3);
merge.appendDocument(pd1, pd2);
pd1.save(fr);
pd1.close();
pd2.close();
PDDocument pdr = PDDocument.load(fr);
merge.appendDocument(pdr, pd3);
pdr.save(fr);
pdr.close();
pd3.close();
}
catch (Exception e) {
System.out.println("Error" + e.getLocalizedMessage());
e.printStackTrace();
}
}
}[^PDFocg2.pdf]
> Wrong COSType for OCProperties after merge
> ------------------------------------------
>
> Key: PDFBOX-4814
> URL: https://issues.apache.org/jira/browse/PDFBOX-4814
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.19
> Reporter: Andreas Küllinger
> Priority: Major
>
> If you merge a PDF document with OCProperties to a PDF document without
> OCProperties, the result of the merge is that the OCProperties type is no
> longer a COSDictionary but a COSObject. If a third document with OCProperties
> is merged with the previously created merge result, this leads to the
> following ClassCastException:
> org.apache.pdfbox.cos.COSObject cannot be cast to
> org.apache.pdfbox.cos.COSDictionary at
> org.apache.pdfbox.multipdf.PDFCloneUtility.cloneMerge(PDFCloneUtility.java:227)
> at
> org.apache.pdfbox.multipdf.PDFCloneUtility.cloneMerge(PDFCloneUtility.java:229)
> at
> org.apache.pdfbox.multipdf.PDFMergerUtility.appendDocument(PDFMergerUtility.java:730)
> at pdfboxtest.Test.main(Test.java:38)
> According to PDF Specification, OCProperties is always a dictionary.
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