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

    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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        if (info != null) {
          DublinCoreSchema dc = new DublinCoreSchema();
          PdfSchema p = new PdfSchema();
          XmpBasicSchema basic = new XmpBasicSchema();
          PdfName key;
          PdfObject obj;
          for (PdfName pdfName : info.getKeys()) {
            key = pdfName;
            obj = info.get(key);
            if (obj == null)
              continue;
            if (PdfName.TITLE.equals(key)) {
              dc.addTitle(((PdfString)obj).toUnicodeString());
            }
            if (PdfName.AUTHOR.equals(key)) {
              dc.addAuthor(((PdfString)obj).toUnicodeString());
            }
            if (PdfName.SUBJECT.equals(key)) {
              dc.addSubject(((PdfString)obj).toUnicodeString());
              dc.addDescription(((PdfString)obj).toUnicodeString());
            }
            if (PdfName.KEYWORDS.equals(key)) {
              p.addKeywords(((PdfString)obj).toUnicodeString());
            }
            if (PdfName.CREATOR.equals(key)) {
              basic.addCreatorTool(((PdfString)obj).toUnicodeString());
            }
            if (PdfName.PRODUCER.equals(key)) {
              p.addProducer(((PdfString)obj).toUnicodeString());
            }
            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 void merge() throws IOException {
        if (used || validated.isEmpty())
            return;
        used = true;
        PdfDictionary catalog = reader.getCatalog();
        PdfObject dss = catalog.get(PdfName.DSS);
        if (dss == null)
            createDss();
        else
            updateDss();
    }

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        for (PdfObject pi : toDelete) {
            if (!pi.isIndirect())
                continue;
            PRIndirectReference pir = (PRIndirectReference)pi;
            for (int k = 0; k < all.size(); ++k) {
                PdfObject po = all.getPdfObject(k);
                if (!po.isIndirect())
                    continue;
                PRIndirectReference pod = (PRIndirectReference)po;
                if (pir.getNumber() == pod.getNumber()) {
                    all.remove(k);
                    --k;

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  public static PdfViewerPreferencesImp getViewerPreferences(PdfDictionary catalog) {
    PdfViewerPreferencesImp preferences = new PdfViewerPreferencesImp();
    int prefs = 0;
    PdfName name = null;
    // page layout
    PdfObject obj = PdfReader.getPdfObjectRelease(catalog.get(PdfName.PAGELAYOUT));
    if (obj != null && obj.isName()) {
      name = (PdfName) obj;
      if (name.equals(PdfName.SINGLEPAGE))
        prefs |= PdfWriter.PageLayoutSinglePage;
      else if (name.equals(PdfName.ONECOLUMN))
        prefs |= PdfWriter.PageLayoutOneColumn;
      else if (name.equals(PdfName.TWOCOLUMNLEFT))
        prefs |= PdfWriter.PageLayoutTwoColumnLeft;
      else if (name.equals(PdfName.TWOCOLUMNRIGHT))
        prefs |= PdfWriter.PageLayoutTwoColumnRight;
      else if (name.equals(PdfName.TWOPAGELEFT))
        prefs |= PdfWriter.PageLayoutTwoPageLeft;
      else if (name.equals(PdfName.TWOPAGERIGHT))
        prefs |= PdfWriter.PageLayoutTwoPageRight;
    }
    // page mode
    obj = PdfReader.getPdfObjectRelease(catalog.get(PdfName.PAGEMODE));
    if (obj != null && obj.isName()) {
      name = (PdfName) obj;
      if (name.equals(PdfName.USENONE))
        prefs |= PdfWriter.PageModeUseNone;
      else if (name.equals(PdfName.USEOUTLINES))
        prefs |= PdfWriter.PageModeUseOutlines;
      else if (name.equals(PdfName.USETHUMBS))
        prefs |= PdfWriter.PageModeUseThumbs;
      else if (name.equals(PdfName.FULLSCREEN))
        prefs |= PdfWriter.PageModeFullScreen;
      else if (name.equals(PdfName.USEOC))
        prefs |= PdfWriter.PageModeUseOC;
      else if (name.equals(PdfName.USEATTACHMENTS))
        prefs |= PdfWriter.PageModeUseAttachments;
    }
    // set page layout and page mode preferences
    preferences.setViewerPreferences(prefs);
    // other preferences
    obj = PdfReader.getPdfObjectRelease(catalog
        .get(PdfName.VIEWERPREFERENCES));
    if (obj != null && obj.isDictionary()) {
      PdfDictionary vp = (PdfDictionary) obj;
      for (int i = 0; i < VIEWER_PREFERENCES.length; i++) {
        obj = PdfReader.getPdfObjectRelease(vp.get(VIEWER_PREFERENCES[i]));
        preferences.addViewerPreference(VIEWER_PREFERENCES[i], obj);
      }

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                PdfImage image = (PdfImage)obj1;
                if (image.get(PdfName.SMASK) != null)
                    throw new PdfXConformanceException(MessageLocalization.getComposedMessage("the.smask.key.is.not.allowed.in.images"));
                switch (conf) {
                    case PdfWriter.PDFX1A2001:
                        PdfObject cs = image.get(PdfName.COLORSPACE);
                        if (cs == null)
                            return;
                        if (cs.isName()) {
                            if (PdfName.DEVICERGB.equals(cs))
                                throw new PdfXConformanceException(MessageLocalization.getComposedMessage("colorspace.rgb.is.not.allowed"));
                        }
                        else if (cs.isArray()) {
                            if (PdfName.CALRGB.equals(((PdfArray)cs).getPdfObject(0)))
                                throw new PdfXConformanceException(MessageLocalization.getComposedMessage("colorspace.calrgb.is.not.allowed"));
                        }
                        break;
                }
                break;
            case PDFXKEY_GSTATE:
                PdfDictionary gs = (PdfDictionary)obj1;
                PdfObject obj = gs.get(PdfName.BM);
                if (obj != null && !PdfGState.BM_NORMAL.equals(obj) && !PdfGState.BM_COMPATIBLE.equals(obj))
                    throw new PdfXConformanceException(MessageLocalization.getComposedMessage("blend.mode.1.not.allowed", obj.toString()));
                obj = gs.get(PdfName.CA);
                double v = 0.0;
                if (obj != null && (v = ((PdfNumber)obj).doubleValue()) != 1.0)
                    throw new PdfXConformanceException(MessageLocalization.getComposedMessage("transparency.is.not.allowed.ca.eq.1", String.valueOf(v)));
                obj = gs.get(PdfName.ca);

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  /**
   * 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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