[jira] [Created] (PDFBOX-4738) Pages do not have objects after splitting

["Yuguang Huang (Jira)" <ji...@apache.org>]

Yuguang Huang created PDFBOX-4738:
-------------------------------------

             Summary: Pages do not have objects after splitting
                 Key: PDFBOX-4738
                 URL: https://issues.apache.org/jira/browse/PDFBOX-4738
             Project: PDFBox
          Issue Type: Bug
            Reporter: Yuguang Huang


 

Hi PDFBOX community, we want to get objs count on pages instead of the whole document. 

Our way to do it is splitting the whole document into multiple documents containing only one page. But it seems then it returns documents/pages without objects, getDocument().getObjects() returns an empty list. 

But if we save each page into bytes then load them into PDDocument, we are able to get the object counts. 

 

Is there any way we can get the page objs count without involving so much IO? Thanks! 

 
{code:java}
private static void printNumObjects(String pdfFilename) throws IOException {
 byte[] fileContent = Files.readAllBytes((new File(pdfFilename)).toPath());
 PDDocument document = PDDocument.load(fileContent);
 List<PDDocument> pages = new Splitter().split(document);
 List<byte[]> pageBytes = pages.stream().map(page -> {
 try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
 page.save(baos);
 page.close();
 return baos.toByteArray();
 } catch (IOException e) {
 LOG.error("Failed to get bytes from page.", e);
 return new byte[0];
 }
 }).collect(Collectors.toList());

 System.out.println("Page objects count from splitted pages:");
 IntStream.range(0, pages.size()).forEach(i -> System.out.println(String.format("page [%d] num of objs [%d]", i + 1, pages.get(i).getDocument().getObjects().size())));

 System.out.println("Page objects count from pages generated from bytes:");
 IntStream.range(0, pageBytes.size()).forEach(i -> {
 try {
 System.out.println(String.format("page [%d] num of objs [%d]", i + 1, PDDocument.load(pageBytes.get(i)).getDocument().getObjects().size()));
 } catch (IOException e) {
 LOG.error("Failed to load page.", e);
 }
 });
}{code}
 

 



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