Examples of com.itextpdf.text.pdf.PdfObject

com.itextpdf.text.pdf.PdfObject
PdfObject is the abstract superclass of all PDF objects.
PDF supports seven basic types of objects: Booleans, numbers, strings, names, arrays, dictionaries and streams. In addition, PDF provides a null object. Objects may be labeled so that they can be referred to by other objects.
All these basic PDF objects are described in the 'Portable Document Format Reference Manual version 1.3' Chapter 4 (pages 37-54). @see PdfNull @see PdfBoolean @see PdfNumber @see PdfString @see PdfName @see PdfArray @see PdfDictionary @see PdfStream @see PdfIndirectReference

    private static class ShowTextArray implements ContentOperator{
        public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
            PdfArray array = (PdfArray)operands.get(0);
            float tj = 0;
            for (Iterator<PdfObject> i = array.listIterator(); i.hasNext(); ) {
                PdfObject entryObj = i.next();
                if (entryObj instanceof PdfString){
                    processor.displayPdfString((PdfString)entryObj);
                    tj = 0;
                } else {
                    tj = ((PdfNumber)entryObj).floatValue();

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    public void invoke(PdfContentStreamProcessor processor,
        PdfLiteral operator, ArrayList<PdfObject> operands)
        throws Exception {


        PdfObject properties = operands.get(1);


      processor.beginMarkedContent((PdfName)operands.get(0), getPropertiesDictionary(properties, processor.resources));
    }

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          // Second - read the memory based PDF file and read the image. Write
          // this into PNG file.
          PdfReader reader = new PdfReader(baos.toByteArray());
          for (int j = 0; j < reader.getXrefSize(); j++) {
            PdfObject pdfobj = reader.getPdfObject(j);
            if (pdfobj != null) {
              if (pdfobj.isStream()) {
                PdfStream stream = (PdfStream) pdfobj;
                PdfObject pdfsubtype = stream.get(PdfName.SUBTYPE);
                if (pdfsubtype != null) {
                  if (pdfsubtype.toString().equals(PdfName.IMAGE.toString())) {
                    PdfImageObject image = new PdfImageObject((PRStream) stream);
                    BufferedImage bufferedImage = image.getBufferedImage();
                    if (bufferedImage != null) {
                      String pngName = IdUtils.getUniqueID() + ".png";
                      File pngFile = new File(tmpDirectory, pngName);

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    final PdfDictionary pageDictionary = pdfReader.getPageN(pageNumber);


    final PdfDictionary resourceDictionary = pageDictionary.getAsDict(PdfName.RESOURCES);


    final PdfObject contentObject = pageDictionary.get(PdfName.CONTENTS);
    final byte[] contentBytes = readContentBytes(contentObject);
    PdfContentStreamProcessor processor = new PdfContentStreamProcessor(_renderListener);
    processor.processContent(contentBytes, resourceDictionary);
    
  }

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    final byte[] result;
    switch (contentObject.type())
    {
      case PdfObject.INDIRECT:
        final PRIndirectReference ref = (PRIndirectReference) contentObject;
        final PdfObject directObject = PdfReader.getPdfObject(ref);
        result = readContentBytes(directObject);
        break;
      case PdfObject.STREAM:
        final PRStream stream = (PRStream) PdfReader.getPdfObject(contentObject);
        result = PdfReader.getStreamBytes(stream);
        break;
      case PdfObject.ARRAY:
        // Stitch together all content before calling processContent(), because
        // processContent() resets state.
        final ByteArrayOutputStream allBytes = new ByteArrayOutputStream();
        final PdfArray contentArray = (PdfArray) contentObject;
        final ListIterator iter = contentArray.listIterator();
        while (iter.hasNext())
        {
          final PdfObject element = (PdfObject) iter.next();
          allBytes.write(readContentBytes(element));
        }
        result = allBytes.toByteArray();
        break;
      default:

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   * You can only use this method after you have set the value of the item.
   * @param prefix  a prefix
   */
  public void setPrefix(String key, String prefix) {
    PdfName fieldname = new PdfName(key);
    PdfObject o = get(fieldname);
    if (o == null)
      throw new IllegalArgumentException(MessageLocalization.getComposedMessage("you.must.set.a.value.before.adding.a.prefix"));
    PdfDictionary dict = new PdfDictionary(PdfName.COLLECTIONSUBITEM);
    dict.put(PdfName.D, o);
    dict.put(PdfName.P, new PdfString(prefix, PdfObject.TEXT_UNICODE));

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        if (info != null) {
          DublinCoreSchema dc = new DublinCoreSchema();
          PdfSchema p = new PdfSchema();
          XmpBasicSchema basic = new XmpBasicSchema();
          PdfName key;
          PdfObject obj;
          String value;
          for (PdfName pdfName : info.getKeys()) {
            key = pdfName;
            obj = info.get(key);
            if (obj == null)
              continue;
            value = ((PdfString)obj).toUnicodeString();
            if (PdfName.TITLE.equals(key)) {
              dc.addTitle(value);
            }
            if (PdfName.AUTHOR.equals(key)) {
              dc.addAuthor(value);
            }
            if (PdfName.SUBJECT.equals(key)) {
              dc.addSubject(value);
              dc.addDescription(value);
            }
            if (PdfName.KEYWORDS.equals(key)) {
              p.addKeywords(value);
            }
            if (PdfName.CREATOR.equals(key)) {
              basic.addCreatorTool(value);
            }
            if (PdfName.PRODUCER.equals(key)) {
              p.addProducer(value);
            }
            if (PdfName.CREATIONDATE.equals(key)) {
              basic.addCreateDate(PdfDate.getW3CDate(obj.toString()));
            }
            if (PdfName.MODDATE.equals(key)) {
              basic.addModDate(PdfDate.getW3CDate(obj.toString()));
            }
          }
          if (dc.size() > 0) addRdfDescription(dc);
          if (p.size() > 0) addRdfDescription(p);
          if (basic.size() > 0) addRdfDescription(basic);

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    public static Image getInstance(final PRIndirectReference ref) throws BadElementException {
        PdfDictionary dic = (PdfDictionary)PdfReader.getPdfObjectRelease(ref);
        int width = ((PdfNumber)PdfReader.getPdfObjectRelease(dic.get(PdfName.WIDTH))).intValue();
        int height = ((PdfNumber)PdfReader.getPdfObjectRelease(dic.get(PdfName.HEIGHT))).intValue();
        Image imask = null;
        PdfObject obj = dic.get(PdfName.SMASK);
        if (obj != null && obj.isIndirect()) {
            imask = getInstance((PRIndirectReference)obj);
        }
        else {
            obj = dic.get(PdfName.MASK);
            if (obj != null && obj.isIndirect()) {
                PdfObject obj2 = PdfReader.getPdfObjectRelease(obj);
                if (obj2 instanceof PdfDictionary)
                    imask = getInstance((PRIndirectReference)obj);
            }
        }
        Image img = new ImgRaw(width, height, 1, 1, null);

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        if (additional == null)
            return;
        PdfArray value = additional.getAsArray(PdfName.COLORSPACE);
        if (value == null)
            return;
        PdfObject cs = simplifyColorspace(value);
        PdfObject newValue;
        if (cs.isName())
            newValue = cs;
        else {
            newValue = value;
            PdfName first = value.getAsName(0);

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                dic.put(PdfName.GAMMA, new PdfNumber(gamma));
                dic.put(PdfName.WHITEPOINT, new PdfLiteral("[1 1 1]"));
                array.add(dic);
            }
            else {
                PdfObject wp = new PdfLiteral("[1 1 1]");
                array.add(PdfName.CALRGB);
                if (gamma != 1f) {
                    PdfArray gm = new PdfArray();
                    PdfNumber n = new PdfNumber(gamma);
                    gm.add(n);

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