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

  /**
   * Defines the sort order of the field (ascending or descending).
   * @param ascending  true is the default, use false for descending order
   */
  public void setSortOrder(boolean ascending) {
    PdfObject o = get(PdfName.S);
    if (o instanceof PdfName) {
      put(PdfName.A, new PdfBoolean(ascending));
    }
    else {
      throw new IllegalArgumentException(MessageLocalization.getComposedMessage("you.have.to.define.a.boolean.array.for.this.collection.sort.dictionary"));

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  /**
   * Defines the sort order of the field (ascending or descending).
   * @param ascending  an array with every element corresponding with a name of a field.
   */
  public void setSortOrder(boolean[] ascending) {
    PdfObject o = get(PdfName.S);
    if (o instanceof PdfArray) {
      if (((PdfArray)o).size() != ascending.length) {
        throw new IllegalArgumentException(MessageLocalization.getComposedMessage("the.number.of.booleans.in.this.array.doesn.t.correspond.with.the.number.of.fields"));
      }
      PdfArray array = new PdfArray();

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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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    StringBuilder barcodes = new StringBuilder();
    StringBuilder textBarcodes = new StringBuilder();
    for (int i = 0; i < xrefSize; i++) {
      God.appWindow.getStatusBar().setInitProgress(i, xrefSize);
      try {
        PdfObject pdfobj = reader.getPdfObject(i);
        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())) {
                getImageFromPageAndAddOcrResultToContent(ocr, pdfContent, barcodes, textBarcodes, ocrName, stream);
              }
            }
          }
        }

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    }
  }


  private static void writePdfImageFromStreamIntoFile(PdfStream stream, final File tmpJpegFile) {
    try {
      PdfObject filterObject = stream.get(PdfName.FILTER);
      String filterName = filterObject.toString();
      if (filterName.equals("/DCTDecode")) {
        writePdfImageFromStreamViaRawImage(stream, tmpJpegFile);
      }
      else {
        writePdfImageFromStreamViaBufferedImage(stream, tmpJpegFile);

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    PdfReader reader = new PdfReader(pdfName);
    StringBuilder pdfContent = new StringBuilder();
    StringBuilder barcodes = new StringBuilder();
    StringBuilder textBarcodes = new StringBuilder();
    for (int i = 0; i < reader.getXrefSize(); i++) {
      PdfObject pdfobj = reader.getPdfObject(i);
      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())) {
              System.out.println("OCR on PDF object " + i);
              getImageFromPageAndAddOcrResultToContent(ocr, pdfContent, barcodes, textBarcodes, ocrName, stream);
            }
          }
        }

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    }
  }


  private static void writePdfImageFromStreamIntoFile(PdfStream stream, final File tmpJpegFile) {
    try {
      PdfObject filterObject = stream.get(PdfName.FILTER);
      String filterName = filterObject.toString();
      if (filterName.equals("/DCTDecode")) {
        writePdfImageFromStreamViaRawImage(stream, tmpJpegFile);
      }
      else {
        writePdfImageFromStreamViaBufferedImage(stream, tmpJpegFile);

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   * @param ocgs  the removal list
   */
  private void removeOCGsFromArray(PdfArray array, Set<String> ocgs) {
    if (array == null)
      return;
    PdfObject o;
    PdfDictionary dict;
    List<Integer> remove = new ArrayList<Integer>();
    for (int i = array.size(); i > 0; ) {
      o = array.getDirectObject(--i);
      if (o.isDictionary()) {
        dict = (PdfDictionary)o;
        if (isToBeRemoved(dict, ocgs)) {
          remove.add(i);
        }
        else {
          removeOCGsFromArray(dict, PdfName.OCGS, ocgs);
        }
      }
      if (o.isArray()) {
        removeOCGsFromArray((PdfArray)o, ocgs);
      }
    }
    for (Integer i : remove) {
      array.remove(i);

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     * Displays an XObject using the registered handler for this XObject's subtype
     * @param xobjectName the name of the XObject to retrieve from the resource dictionary
     */
    private void displayXObject(PdfName xobjectName) throws IOException {
        PdfDictionary xobjects = resources.getAsDict(PdfName.XOBJECT);
        PdfObject xobject = xobjects.getDirectObject(xobjectName);
        PdfStream xobjectStream = (PdfStream)xobject;


        PdfName subType = xobjectStream.getAsName(PdfName.SUBTYPE);
        if (xobject.isStream()){
            XObjectDoHandler handler = xobjectDoHandlers.get(subType);
            if (handler == null)
                handler = xobjectDoHandlers.get(PdfName.DEFAULT);
            handler.handleXObject(this, xobjectStream, xobjects.getAsIndirectObject(xobjectName));
        } else {

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        @Override
        public PdfObject getDirectObject(PdfName key) {
            for (int i = resourcesStack.size() - 1; i >= 0; i--){
                PdfDictionary subResource = resourcesStack.get(i);
                if (subResource != null){
                    PdfObject obj =  subResource.getDirectObject(key);
                    if (obj != null) return obj;
                }
            }
            return super.getDirectObject(key); // shouldn't be necessary, but just in case we've done something crazy
        }

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