PageRefs(PageRefs other,
    PdfReader reader) 
{
            this.reader = reader;
            this.sizep = other.sizep;
            if (other.refsn != null) {
                refsn = new ArrayList(other.refsn);
                for (int k = 0; k <  refsn.size(); ++k) {
                    refsn.set(k, duplicatePdfObject((PdfObject)refsn.get(k), reader));
                }
            }
            else
                this.refsp = (IntHashtable)other.refsp.clone();
}

 public PdfDictionary getPageN(int pageNum) 
{
            PRIndirectReference ref = getPageOrigRef(pageNum);
            return (PdfDictionary)PdfReader.getPdfObject(ref);
}

Gets the dictionary that represents a page.

 public PdfDictionary getPageNRelease(int pageNum) 
{
            PdfDictionary page = getPageN(pageNum);
            releasePage(pageNum);
            return page;
}

 public PRIndirectReference getPageOrigRef(int pageNum) 
{
            try {
                --pageNum;
                if (pageNum <  0 || pageNum  >= size())
                    return null;
                if (refsn != null)
                    return (PRIndirectReference)refsn.get(pageNum);
                else {
                    int n = refsp.get(pageNum);
                    if (n == 0) {
                        PRIndirectReference ref = getSinglePage(pageNum);
                        if (reader.lastXrefPartial == -1)
                            lastPageRead = -1;
                        else
                            lastPageRead = pageNum;
                        reader.lastXrefPartial = -1;
                        refsp.put(pageNum, ref.getNumber());
                        if (keepPages)
                            lastPageRead = -1;
                        return ref;
                    }
                    else {
                        if (lastPageRead != pageNum)
                            lastPageRead = -1;
                        if (keepPages)
                            lastPageRead = -1;
                        return new PRIndirectReference(reader, n);
                    }
                }
            }
            catch (Exception e) {
                throw new ExceptionConverter(e);
            }
}

Gets the page reference to this page.

 public PRIndirectReference getPageOrigRefRelease(int pageNum) 
{
            PRIndirectReference ref = getPageOrigRef(pageNum);
            releasePage(pageNum);
            return ref;
}

 protected PRIndirectReference getSinglePage(int n) 
{
            PdfDictionary acc = new PdfDictionary();
            PdfDictionary top = reader.rootPages;
            int base = 0;
            while (true) {
                for (int k = 0; k <  pageInhCandidates.length; ++k) {
                    PdfObject obj = top.get(pageInhCandidates[k]);
                    if (obj != null)
                        acc.put(pageInhCandidates[k], obj);
                }
                PdfArray kids = (PdfArray)PdfReader.getPdfObjectRelease(top.get(PdfName.KIDS));
                for (Iterator it = kids.listIterator(); it.hasNext();) {
                    PRIndirectReference ref = (PRIndirectReference)it.next();
                    PdfDictionary dic = (PdfDictionary)getPdfObject(ref);
                    int last = reader.lastXrefPartial;
                    PdfObject count = getPdfObjectRelease(dic.get(PdfName.COUNT));
                    reader.lastXrefPartial = last;
                    int acn = 1;
                    if (count != null && count.type() == PdfObject.NUMBER)
                        acn = ((PdfNumber)count).intValue();
                    if (n <  base + acn) {
                        if (count == null) {
                            dic.mergeDifferent(acc);
                            return ref;
                        }
                        reader.releaseLastXrefPartial();
                        top = dic;
                        break;
                    }
                    reader.releaseLastXrefPartial();
                    base += acn;
                }
            }
}

  void insertPage(int pageNum,
    PRIndirectReference ref) 
{
            --pageNum;
            if (refsn != null) {
                if (pageNum  >= refsn.size())
                    refsn.add(ref);
                else
                    refsn.add(pageNum, ref);
            }
            else {
                ++sizep;
                lastPageRead = -1;
                if (pageNum  >= size()) {
                    refsp.put(size(), ref.getNumber());
                }
                else {
                    IntHashtable refs2 = new IntHashtable((refsp.size() + 1) * 2);
                    for (Iterator it = refsp.getEntryIterator(); it.hasNext();) {
                        IntHashtable.Entry entry = (IntHashtable.Entry)it.next();
                        int p = entry.getKey();
                        refs2.put(p  >= pageNum ? p + 1 : p, entry.getValue());
                    }
                    refs2.put(pageNum, ref.getNumber());
                    refsp = refs2;
                }
            }
}

  void keepPages() 
{
            if (refsp == null || keepPages)
                return;
            keepPages = true;
            refsp.clear();
}

  void reReadPages() throws IOException 
{
            refsn = null;
            readPages();
}

  void readPages() throws IOException 
{
            if (refsn != null)
                return;
            refsp = null;
            refsn = new ArrayList();
            pageInh = new ArrayList();
            iteratePages((PRIndirectReference)reader.catalog.get(PdfName.PAGES));
            pageInh = null;
            reader.rootPages.put(PdfName.COUNT, new PdfNumber(refsn.size()));
}

 public  void releasePage(int pageNum) 
{
            if (refsp == null)
                return;
            --pageNum;
            if (pageNum <  0 || pageNum  >= size())
                return;
            if (pageNum != lastPageRead)
                return;
            lastPageRead = -1;
            reader.lastXrefPartial = refsp.get(pageNum);
            reader.releaseLastXrefPartial();
            refsp.remove(pageNum);
}

 public  void resetReleasePage() 
{
            if (refsp == null)
                return;
            lastPageRead = -1;
}

 int size() 
{
            if (refsn != null)
                return refsn.size();
            else
                return sizep;
}