List of usage examples for org.apache.pdfbox.pdfparser PDFXRefStream addEntry
public void addEntry(COSWriterXRefEntry entry)
From source file:com.aaasec.sigserv.csspsupport.pdfbox.modifications.CsCOSWriter.java
License:Apache License
private void doWriteXRefInc(COSDocument doc, long hybridPrev) throws IOException, COSVisitorException { if (doc.isXRefStream() || hybridPrev != -1) { // the file uses XrefStreams, so we need to update // it with an xref stream. We create a new one and fill it // with data available here // first set an entry for the null entry in the xref table // this is probably not necessary // addXRefEntry(COSWriterXRefEntry.getNullEntry()); // create a new XRefStrema object PDFXRefStream pdfxRefStream = new PDFXRefStream(); // add all entries from the incremental update. List<COSWriterXRefEntry> xRefEntries2 = getXRefEntries(); for (COSWriterXRefEntry cosWriterXRefEntry : xRefEntries2) { pdfxRefStream.addEntry(cosWriterXRefEntry); }//from w w w . j a v a2 s . c om COSDictionary trailer = doc.getTrailer(); // trailer.setLong(COSName.PREV, hybridPrev == -1 ? prev : hybridPrev); trailer.setLong(COSName.PREV, doc.getStartXref()); pdfxRefStream.addTrailerInfo(trailer); // the size is the highest object number+1. we add one more // for the xref stream object we are going to write pdfxRefStream.setSize(getNumber() + 2); setStartxref(getStandardOutput().getPos()); COSStream stream2 = pdfxRefStream.getStream(); doWriteObject(stream2); } if (!doc.isXRefStream() || hybridPrev != -1) { COSDictionary trailer = doc.getTrailer(); trailer.setLong(COSName.PREV, doc.getStartXref()); if (hybridPrev != -1) { COSName xrefStm = COSName.XREF_STM; trailer.removeItem(xrefStm); trailer.setLong(xrefStm, getStartxref()); } addXRefEntry(COSWriterXRefEntry.getNullEntry()); // sort xref, needed only if object keys not regenerated Collections.sort(getXRefEntries()); // remember the position where x ref was written setStartxref(getStandardOutput().getPos()); getStandardOutput().write(XREF); getStandardOutput().writeEOL(); // write start object number and object count for this x ref section // we assume starting from scratch Integer[] xRefRanges = getXRefRanges(getXRefEntries()); int xRefLength = xRefRanges.length; int x = 0; int j = 0; while (x < xRefLength && (xRefLength % 2) == 0) { writeXrefRange(xRefRanges[x], xRefRanges[x + 1]); for (int i = 0; i < xRefRanges[x + 1]; ++i) { writeXrefEntry(xRefEntries.get(j++)); } x += 2; } } }