Examples of com.itextpdf.text.pdf.PdfStream

com.itextpdf.text.pdf.PdfStream
PdfStream is the Pdf stream object.
A stream, like a string, is a sequence of characters. However, an application can read a small portion of a stream at a time, while a string must be read in its entirety. For this reason, objects with potentially large amounts of data, such as images and page descriptions, are represented as streams.
A stream consists of a dictionary that describes a sequence of characters, followed by the keyword stream, followed by zero or more lines of characters, followed by the keyword endstream.
All streams must be PdfIndirectObjects. The stream dictionary must be a direct object. The keyword stream that follows the stream dictionary should be followed by a carriage return and linefeed or just a linefeed.
Remark: In this version only the FLATEDECODE-filter is supported.
This object is described in the 'Portable Document Format Reference Manual version 1.7' section 3.2.7 (page 60-63).
@see PdfObject @see PdfDictionary

    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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     * @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));

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          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) {

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        PdfDictionary xobjects = resourceDic.getAsDict(PdfName.XOBJECT);
        if (xobjects == null)
          return "No XObjects";
        for (PdfName entryName : xobjects.getKeys()) {
            PdfStream xobjectStream = xobjects.getAsStream(entryName);
            
            sb.append("------ " + entryName + " - subtype = " + xobjectStream.get(PdfName.SUBTYPE) + " = " + xobjectStream.getAsNumber(PdfName.LENGTH) + " bytes ------\n");
            
            if (!xobjectStream.get(PdfName.SUBTYPE).equals(PdfName.IMAGE)){
            
                byte[] contentBytes = ContentByteUtils.getContentBytesFromContentObject(xobjectStream);
                
                InputStream is = new ByteArrayInputStream(contentBytes);
                int ch;
                while ((ch = is.read()) != -1){
                    sb.append((char)ch);
                }
    
                sb.append("------ " + entryName + " - subtype = " + xobjectStream.get(PdfName.SUBTYPE) + "End of Content" + "------\n");
            }
        }
       
        return sb.toString();
    }

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     * @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));

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