NullPointerException while splitting a PDF document. Please advise.

[Joe Hansen]

Hey all,

We are using PDFBox 1.1.0. I am trying to use the
org.apache.pdfbox.util.Splitter class to split a document into two
documents, given a page# to split at. So I extended the Splitter class
and overriden the createNewDocumentIfNecessary as follows. However,
when I call the split method, the createNewDocumentIfNecessary is
executed once and a NullPointerException is thrown.

Please advise!

Thanks for your time!

Regards,
Joe



/* Here's the code */
PDFSplitter pdfSplitter = new PDFSplitter();
pdfSplitter.setNumPages(pdDocument.getNumberOfPages()); // The
document has 14 pages
pdfSplitter.setSplitAfterPageNum(4); // Split it into two documents
with first document containing 4 pages and the second one containing
10 pages.
List documents = pdfSplitter.split(pdDocument);


import java.io.IOException;
import org.apache.pdfbox.util.Splitter;

public class PDFSplitter extends Splitter {
        private int numPages;
        private int splitAfterPageNum;
        
        // Constructors
        public PDFSplitter() { super(); }
        
        // Setter methods
        public void setSplitAfterPageNum(int splitAfterPageNum) {
                this.splitAfterPageNum = splitAfterPageNum;
        }

        public void setNumPages(int numPages) {
                this.numPages = numPages;
        }

        // Override createNewDocumentIfNecessary method
        protected void createNewDocumentIfNecessary() throws IOException {
                System.out.println("Current Page#: " + this.pageNumber + " - 
Split
After:" + this.splitAfterPageNum);
                if((this.pageNumber + 1) == this.splitAfterPageNum ||
(this.pageNumber + 1) == this.numPages) {
                        System.out.println("Splitting here!");
                        super.createNewDocumentIfNecessary();
                }
        }
}