Example usage for com.itextpdf.text.pdf PdfDictionary getKeys

List of usage examples for com.itextpdf.text.pdf PdfDictionary getKeys

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Introduction

In this page you can find the example usage for com.itextpdf.text.pdf PdfDictionary getKeys.

Prototype

public Set<PdfName> getKeys()

Source Link

Document

Get all keys that are set.

Usage

From source file:cz.muni.pdfjbim.PdfImageExtractor.java

License:Apache License

private List<Image> getImagesFromPdfDict(PdfDictionary dict, PdfReader doc) throws IOException {
    List<Image> images = new ArrayList<Image>();
    PdfDictionary res = (PdfDictionary) (PdfReader.getPdfObject(dict.get(PdfName.RESOURCES)));
    PdfDictionary xobj = (PdfDictionary) (PdfReader.getPdfObject(res.get(PdfName.XOBJECT)));

    if (xobj != null) {
        for (PdfName name : xobj.getKeys()) {
            PdfObject obj = xobj.get(name);
            if (obj.isIndirect()) {
                PdfDictionary tg = (PdfDictionary) (PdfReader.getPdfObject(obj));
                PdfName subtype = (PdfName) (PdfReader.getPdfObject(tg.get(PdfName.SUBTYPE)));
                if (PdfName.IMAGE.equals(subtype)) {
                    int xrefIdx = ((PRIndirectReference) obj).getNumber();
                    PdfObject pdfObj = doc.getPdfObject(xrefIdx);
                    PdfStream str = (PdfStream) (pdfObj);
                    byte[] bytes = PdfReader.getStreamBytesRaw((PRStream) str);

                    String filter = tg.get(PdfName.FILTER).toString();
                    String width = tg.get(PdfName.WIDTH).toString();
                    String height = tg.get(PdfName.HEIGHT).toString();
                    String bpp = tg.get(PdfName.BITSPERCOMPONENT).toString();

                    if ("/FlateDecode".equals(filter)) {
                        bytes = PdfReader.FlateDecode(bytes, true);
                        try {
                            images.add(Image.getInstance(bytes));
                        } catch (BadElementException ex) {
                            log.warn("problem to process FlatDecoded Image", ex);
                        }//from  w  w w  .j a va  2  s . co  m
                    } else if (PdfName.FORM.equals(subtype) || PdfName.GROUP.equals(subtype)) {
                        images.addAll(getImagesFromPdfDict(tg, doc));
                    }
                }
            }
        }
    }
    return images;
}

From source file:cz.muni.pdfjbim.PdfImageProcessor.java

License:Apache License

/**
 * replace images by they recompressed version according to JBIG2 standard
 * positions and image data given in imagesData
 * @param pdfName represents name of original PDF file
 * @param os represents output stream for writing changed PDF file
 * @param imagesData contains compressed images according to JBIG2 standard and informations about them
 * @throws PdfRecompressionException if version of PDF is lower than 1.4 or was catch DocumentException or IOException
 *//*from  w w w .  ja  va2 s .  c om*/
public void replaceImageUsingIText(String pdfName, OutputStream os, Jbig2ForPdf imagesData)
        throws PdfRecompressionException {
    if (pdfName == null) {
        throw new NullPointerException("pdfName");
    }

    if (os == null) {
        throw new NullPointerException("os");
    }

    if (imagesData == null) {
        throw new NullPointerException("imagesData is null => nothing to recompress");
    }

    Map<PdfObjId, PdfImage> jbig2Images = imagesData.getMapOfJbig2Images();

    PdfReader pdf;
    PdfStamper stp = null;
    try {
        pdf = new PdfReader(pdfName);
        stp = new PdfStamper(pdf, os);
        PdfWriter writer = stp.getWriter();

        int version;
        if ((version = Integer.parseInt(String.valueOf(pdf.getPdfVersion()))) < 4) {
            writer.setPdfVersion(PdfWriter.PDF_VERSION_1_4);
        }

        Iterator itImages = jbig2Images.values().iterator();
        String key;
        if (itImages.hasNext()) {
            PdfImage myImg = (PdfImage) itImages.next();
            key = myImg.getPdfImageInformation().getKey();
        } else {
            key = "im0";
        }

        for (int pageNum = 1; pageNum <= pdf.getNumberOfPages(); pageNum++) {

            PdfDictionary pg = pdf.getPageN(pageNum);
            PdfDictionary resPg = (PdfDictionary) PdfReader.getPdfObject(pg.get(PdfName.RESOURCES));

            PdfDictionary xobjResPg = (PdfDictionary) PdfReader.getPdfObject(resPg.get(PdfName.XOBJECT));

            PdfObject obj = null;
            if (xobjResPg != null) {
                for (Iterator it = xobjResPg.getKeys().iterator(); it.hasNext();) {
                    PdfObject pdfObjIndirect = xobjResPg.get((PdfName) it.next());
                    if (pdfObjIndirect.isIndirect()) {
                        PdfDictionary pdfObj2 = (PdfDictionary) PdfReader.getPdfObject(pdfObjIndirect);
                        PdfDictionary xobj2Res = (PdfDictionary) PdfReader
                                .getPdfObject(pdfObj2.get(PdfName.RESOURCES));
                        if (xobj2Res != null) {
                            for (Iterator it2 = xobj2Res.getKeys().iterator(); it2.hasNext();) {
                                PdfObject resObj = xobj2Res.get((PdfName) it2.next());
                            }
                            PdfDictionary xobj = (PdfDictionary) PdfReader
                                    .getPdfObject(xobj2Res.get(PdfName.XOBJECT));
                            if (xobj == null) {
                                continue;
                            }
                            obj = xobj.get(new PdfName(key));
                        } else {
                            obj = xobjResPg.get(new PdfName(key));
                            if (obj == null) {
                                obj = pdfObjIndirect;
                            }
                        }
                    }
                }
            }

            if ((obj != null) && (obj.isIndirect())) {

                PdfDictionary tg = (PdfDictionary) PdfReader.getPdfObject(obj);
                if (tg == null) {
                    continue;
                }
                PdfName type = (PdfName) PdfReader.getPdfObject(tg.get(PdfName.SUBTYPE));
                if (PdfName.IMAGE.equals(type)) {
                    PRIndirectReference ref = (PRIndirectReference) obj;
                    PdfObjId imId = new PdfObjId(ref.getNumber(), ref.getGeneration());
                    PdfImage jbImage = jbig2Images.get(imId);
                    if (jbImage == null) {
                        continue;
                    }
                    PdfImageInformation jbImageInfo = jbImage.getPdfImageInformation();
                    Image img = Image.getInstance(jbImageInfo.getWidth(), jbImageInfo.getHeight(),
                            jbImage.getImageData(), imagesData.getGlobalData());

                    PdfReader.killIndirect(obj);
                    Image maskImage = img.getImageMask();

                    if (maskImage != null) {
                        writer.addDirectImageSimple(maskImage);
                    }
                    writer.addDirectImageSimple(img, (PRIndirectReference) obj);
                }
            }
        }
        stp.close();
    } catch (IOException ioEx) {
        throw new PdfRecompressionException(ioEx);
    } catch (DocumentException dEx) {
        throw new PdfRecompressionException(dEx);
    } finally {
        Tools.deleteFilesFromList(imagesData.getJbFiles().toArray(new File[0]));
    }
}

From source file:cz.muni.pdfjbim.PdfImageReplacer.java

License:Apache License

/**
 * replace images by they recompressed version according to JBIG2 standard positions and image
 * data given in imagesData//  w  w  w. j a  va  2 s  .  c o m
 *
 * @param originalPdf represents name of original PDF file
 * @param os represents output stream for writing changed PDF file
 * @param imagesData contains compressed images according to JBIG2 standard and informations
 * about them
 * @throws PdfRecompressionException if version of PDF is lower than 1.4 or was catch
 * DocumentException or IOException
 */
public void replaceImageUsingIText(InputStream originalPdf, OutputStream os, List<Jbig2ForPdf> imagesDataList)
        throws PdfRecompressionException {
    if (originalPdf == null) {
        throw new NullPointerException("pdfName");
    }

    if (os == null) {
        throw new NullPointerException("os");
    }

    if (imagesDataList == null) {
        throw new NullPointerException("imagesData is null => nothing to recompress");
    }

    log.info("Replacing old images in PDF with their equivalent encoded according to standard JBIG2");
    PdfReader pdf;
    PdfStamper stp = null;
    try {
        pdf = new PdfReader(originalPdf);
        stp = new PdfStamper(pdf, os);
        PdfWriter writer = stp.getWriter();

        int version;
        if ((version = Integer.parseInt(String.valueOf(pdf.getPdfVersion()))) < 4) {
            log.debug("PDF version of original PDF was {} => changing to PDF version 1.4", pdf.getPdfVersion());
            writer.setPdfVersion(PdfWriter.PDF_VERSION_1_4);
        }

        for (Jbig2ForPdf imagesData : imagesDataList) {

            Map<PdfObjId, PdfImage> jbig2Images = imagesData.getMapOfJbig2Images();

            Iterator itImages = jbig2Images.values().iterator();
            String key;
            if (itImages.hasNext()) {
                PdfImage myImg = (PdfImage) itImages.next();
                key = myImg.getPdfImageInformation().getKey();
            } else {
                key = "im0";
            }

            for (int pageNum = 1; pageNum <= pdf.getNumberOfPages(); pageNum++) {

                PdfDictionary pg = pdf.getPageN(pageNum);
                PdfDictionary resPg = (PdfDictionary) PdfReader.getPdfObject(pg.get(PdfName.RESOURCES));

                PdfDictionary xobjResPg = (PdfDictionary) PdfReader.getPdfObject(resPg.get(PdfName.XOBJECT));

                PdfObject obj = null;
                if (xobjResPg != null) {
                    for (Iterator it = xobjResPg.getKeys().iterator(); it.hasNext();) {
                        PdfObject pdfObjIndirect = xobjResPg.get((PdfName) it.next());
                        if (pdfObjIndirect.isIndirect()) {
                            PdfDictionary pdfObj2 = (PdfDictionary) PdfReader.getPdfObject(pdfObjIndirect);
                            PdfDictionary xobj2Res = (PdfDictionary) PdfReader
                                    .getPdfObject(pdfObj2.get(PdfName.RESOURCES));
                            if (xobj2Res != null) {
                                for (Iterator it2 = xobj2Res.getKeys().iterator(); it2.hasNext();) {
                                    PdfObject resObj = xobj2Res.get((PdfName) it2.next());
                                }
                                PdfDictionary xobj = (PdfDictionary) PdfReader
                                        .getPdfObject(xobj2Res.get(PdfName.XOBJECT));
                                if (xobj == null) {
                                    continue;
                                }
                                obj = xobj.get(new PdfName(key));
                            } else {
                                obj = xobjResPg.get(new PdfName(key));
                                if (obj == null) {
                                    obj = pdfObjIndirect;
                                }
                            }
                        }
                    }
                }

                if ((obj != null) && (obj.isIndirect())) {

                    PdfDictionary tg = (PdfDictionary) PdfReader.getPdfObject(obj);
                    if (tg == null) {
                        continue;
                    }
                    PdfName type = (PdfName) PdfReader.getPdfObject(tg.get(PdfName.SUBTYPE));
                    if (PdfName.IMAGE.equals(type)) {
                        PRIndirectReference ref = (PRIndirectReference) obj;
                        PdfObjId imId = new PdfObjId(ref.getNumber(), ref.getGeneration());
                        PdfImage jbImage = jbig2Images.get(imId);
                        if (jbImage == null) {
                            continue;
                        }

                        log.debug("Replacing image {}", jbImage);
                        PdfImageInformation jbImageInfo = jbImage.getPdfImageInformation();
                        Image img = Image.getInstance(jbImageInfo.getWidth(), jbImageInfo.getHeight(),
                                jbImage.getImageData(), imagesData.getGlobalData());

                        PdfReader.killIndirect(obj);
                        Image maskImage = img.getImageMask();

                        if (maskImage != null) {
                            writer.addDirectImageSimple(maskImage);
                        }
                        writer.addDirectImageSimple(img, (PRIndirectReference) obj);
                    }
                }
            }
        }
    } catch (IOException ioEx) {
        throw new PdfRecompressionException(ioEx);
    } catch (DocumentException dEx) {
        throw new PdfRecompressionException(dEx);
    } finally {
        log.debug("Deleting temporary files created during process of PDF recompression");
        for (Jbig2ForPdf imagesData : imagesDataList) {
            Tools.deleteFilesFromList(imagesData.getJbFiles().toArray(new File[0]));
        }
        try {
            if (stp != null) {
                stp.close();
            }
        } catch (DocumentException ex) {
            log.error("Exception thrown while closing stream", ex);
        } catch (IOException ex) {
            log.error("Exception thrown while closing stream", ex);
        }
    }

}

From source file:de.rub.dez6a3.jpdfsigner.control.JPodPDFViewer.java

License:Open Source License

@Override
public ArrayList getAttachments() throws IOException {
    ArrayList files = new ArrayList();
    PdfReader reader = new PdfReader(conf.getPDFFile());
    PdfDictionary root = reader.getCatalog();
    PdfDictionary documentnames = root.getAsDict(PdfName.NAMES);
    PdfDictionary embeddedfiles = documentnames.getAsDict(PdfName.EMBEDDEDFILES);
    PdfArray filespecs = embeddedfiles.getAsArray(PdfName.NAMES);
    PdfDictionary filespec;/*from   w w  w .java  2s .co m*/
    PdfDictionary refs;
    for (int i = 0; i < filespecs.size();) {
        filespecs.getAsName(i++);
        filespec = filespecs.getAsDict(i++);
        refs = filespec.getAsDict(PdfName.EF);
        Iterator it = refs.getKeys().iterator();
        while (it.hasNext()) {
            PdfName key = (PdfName) it.next();
            if (key.toString().equals("/F")) {

                String filename = "-";
                String desc = "-";
                int size = -1;
                String moddate = "-";
                String compsize = "-";
                PdfObject pdfobj = null;

                try {
                    filename = filespec.getAsString(key).toString();
                } catch (Exception e) {
                    log.warn("Cannot load attachment-name - " + e.getMessage());
                }
                try {
                    desc = filespec.getAsString(PdfName.DESC).toString();
                } catch (Exception e) {
                    log.warn("Cannot load attachment-description - " + e.getMessage());
                }
                byte[] attBytes = null;
                try {
                    PRStream stream = (PRStream) PdfReader.getPdfObject(refs.getAsIndirectObject(key));
                    attBytes = PdfReader.getStreamBytes(stream);
                    size = attBytes.length;
                } catch (Exception e) {
                    log.warn("Cannot load attachment-size - " + e.getMessage());
                }
                try {
                    pdfobj = PdfReader.getPdfObject(refs.getAsIndirectObject(key));
                } catch (Exception e) {
                    log.warn("Cannot load attachment-pdfobject - " + e.getMessage());
                }

                Hashtable fileData = new Hashtable();
                fileData.put(ATTACHMENT_FILENAME_STRING, filename); //filename
                fileData.put(ATTACHMENT_DESCRIPTION_STRING, desc); //Description
                fileData.put(ATTACHMENT_SIZE_INT, size); //size
                fileData.put(ATTACHMENT_BYTES_ARR, attBytes); //bytes
                files.add(fileData);
            }
        }
    }
    return files;
}

From source file:mkl.testarea.itext5.pdfcleanup.StrictPdfCleanUpProcessor.java

License:Open Source License

private PdfName generateNameForXObj(PdfDictionary pageDict) {
    PdfDictionary resourcesDict = pageDict.getAsDict(PdfName.RESOURCES);
    PdfDictionary xobjDict = resourcesDict.getAsDict(PdfName.XOBJECT);

    if (xobjDict != null) {
        for (PdfName xobjName : xobjDict.getKeys()) {
            int xobjNum = getXObjNum(xobjName);

            if (currentXObjNum <= xobjNum) {
                currentXObjNum = xobjNum + 1;
            }// w  w  w  .j  a v a  2s  .  c o  m
        }
    }

    return new PdfName(XOBJ_NAME_PREFIX + currentXObjNum++);
}

From source file:pl.edu.icm.cermine.structure.ITextCharacterExtractor.java

License:Open Source License

/**
 * Processes PDF's fonts dictionary. During the process alternative names
 * of Standard 14 Fonts are changed to the standard ones, provided that
 * the font definition doesn't include Widths array.
 *
 * Font dictionary in PDF file often includes an array of individual glyphs' widths.
 * Widths array is always required except for the Standard 14 Fonts, which widths
 * are kept by iText itself. Unfortunately, if the font uses alternative name instead of
 * standard one (see PDF Reference 1.7, table H.3), iText doesn't recognize the font as
 * one of the Standard 14 Fonts, and is unable to determine glyphs widths. In such cases
 * this method will change alternative names to standard ones before PDF's parsing process
 */// ww w  .  j  av a2  s . co m
private void processAlternativeFontNames(PdfDictionary resources) {
    if (resources == null) {
        return;
    }
    PdfDictionary fontsDictionary = resources.getAsDict(PdfName.FONT);

    if (fontsDictionary == null) {
        return;
    }
    for (PdfName pdfFontName : fontsDictionary.getKeys()) {
        if (!(fontsDictionary.get(pdfFontName) instanceof PRIndirectReference)) {
            return;
        }
        PRIndirectReference indRef = (PRIndirectReference) fontsDictionary.get(pdfFontName);
        if (!(PdfReader.getPdfObjectRelease(indRef) instanceof PdfDictionary)) {
            return;
        }
        PdfDictionary fontDictionary = (PdfDictionary) PdfReader.getPdfObjectRelease(indRef);

        PdfName baseFont = fontDictionary.getAsName(PdfName.BASEFONT);
        if (baseFont != null) {
            String fontName = PdfName.decodeName(baseFont.toString());
            if (fontDictionary.getAsArray(PdfName.WIDTHS) == null
                    && ALT_TO_STANDART_FONTS.containsKey(fontName)) {
                fontDictionary.put(PdfName.BASEFONT, ALT_TO_STANDART_FONTS.get(fontName));
            }
        }
    }
}

From source file:pl.edu.icm.cermine.structure.ITextCharacterExtractor.java

License:Open Source License

private void processAlternativeColorSpace(PdfDictionary resources) {
    if (resources == null) {
        return;/*  w  w  w. j  av a2s  . com*/
    }
    PdfDictionary csDictionary = resources.getAsDict(PdfName.COLORSPACE);
    if (csDictionary == null) {
        return;
    }
    for (PdfName csName : csDictionary.getKeys()) {
        if (csDictionary.getAsArray(csName) != null) {
            csDictionary.put(csName, PdfName.DEVICEGRAY);
        }
    }
}