Example usage for org.apache.pdfbox.pdfparser PDFStreamParser PDFStreamParser

Introduction

In this page you can find the example usage for org.apache.pdfbox.pdfparser PDFStreamParser PDFStreamParser.

Prototype

public PDFStreamParser(byte[] bytes) throws IOException 

Source Link

Document

Constructor.

Usage

From source file:airviewer.TextInAnnotationReplacer.java

License:Apache License

static void replaceText(PDDocument document, PDAnnotation anAnnotation, String newContents) {

    if (null != anAnnotation.getAppearance() && null != anAnnotation.getAppearance().getNormalAppearance()) {
        try {//from w  w  w  .j  ava  2s .co  m
            PDAppearanceStream annotationAppearanceStream = anAnnotation.getAppearance().getNormalAppearance()
                    .getAppearanceStream();

            PDFStreamParser parser = new PDFStreamParser(annotationAppearanceStream);
            parser.parse();
            List<Object> tokens = parser.getTokens();
            for (int j = 0; j < tokens.size(); j++) {
                Object next = tokens.get(j);
                if (next instanceof Operator) {
                    Operator op = (Operator) next;
                    //Tj and TJ are the two operators that display strings in a PDF
                    if (op.getName().equals("Tj")) {
                        // Tj takes one operand and that is the string to display so lets update that operator
                        COSString previous = (COSString) tokens.get(j - 1);
                        previous.setValue(newContents.getBytes(Charset.forName("UTF-8")));
                    } else if (op.getName().equals("TJ")) {
                        COSArray previous = (COSArray) tokens.get(j - 1);
                        for (int k = 0; k < previous.size(); k++) {
                            Object arrElement = previous.getObject(k);
                            if (arrElement instanceof COSString) {
                                COSString cosString = (COSString) arrElement;
                                cosString.setValue(newContents.getBytes(Charset.forName("UTF-8")));
                            }
                        }
                    }
                }
            }

            try (OutputStream out = annotationAppearanceStream.getStream().createOutputStream()) {
                ContentStreamWriter tokenWriter = new ContentStreamWriter(out);
                tokenWriter.writeTokens(tokens);
            }

            anAnnotation.getAppearance().setNormalAppearance(annotationAppearanceStream);
        } catch (IOException ex) {
            Logger.getLogger(TextInAnnotationReplacer.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

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From source file:org.apache.fop.render.pdf.pdfbox.PDFWriter.java

License:Apache License

public String writeText(PDStream pdStream) throws IOException {
    PDFStreamParser pdfStreamParser = new PDFStreamParser(pdStream);
    pdfStreamParser.parse();/*from   www  .  ja v a2s  .co  m*/
    List<Object> it = pdfStreamParser.getTokens();
    List<COSBase> arguments = new ArrayList<COSBase>();
    for (Object o : it) {
        if (o instanceof Operator) {
            Operator op = (Operator) o;
            readPDFArguments(op, arguments);
            s.append(op.getName() + "\n");
            arguments.clear();
            if (op.getImageParameters() != null) {
                for (Map.Entry<COSName, COSBase> cn : op.getImageParameters().entrySet()) {
                    arguments.add(cn.getKey());
                    arguments.add(cn.getValue());
                }
                readPDFArguments(op, arguments);
                s.append("ID " + new String(op.getImageData(), "ISO-8859-1"));
                arguments.clear();
                s.append("EI\n");
            }
        } else {
            arguments.add((COSBase) o);
        }
    }
    return s.toString();
}

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From source file:Utilities.GlobalVar.java

public static void updateSeqNum(PDDocument doc, String cycle) throws IOException {
    int sequenceNum = 1;
    List pages = doc.getDocumentCatalog().getAllPages();

    for (int i = 0; i < pages.size(); i++) {
        PDPage page = (PDPage) pages.get(i);
        PDStream contents = page.getContents();
        PDFStreamParser parser = new PDFStreamParser(contents.getStream());
        parser.parse();/*from  w w w  .  j av  a2 s . c om*/
        List tokens = parser.getTokens();
        for (int j = 0; j < tokens.size(); j++) {
            Object next = tokens.get(j);
            if (next instanceof PDFOperator) {
                PDFOperator op = (PDFOperator) next;
                // Tj and TJ are the two operators that display strings in a PDF
                if (op.getOperation().equals("Tj")) {
                    // Tj takes one operator and that is the string
                    // to display so lets update that operator
                    COSString previous = (COSString) tokens.get(j - 1);
                    String string = previous.getString();
                    //                        System.out.println(string);
                    //                        System.out.println(string.charAt(5));
                    if (string.contains("/0")) {
                        String seq = cycle + "/" + GlobalVar.globalCountGenerator5Digit(sequenceNum);
                        string = string.replaceFirst(string, seq);
                        previous.reset();
                        previous.append(string.getBytes("ISO-8859-1"));
                        sequenceNum++;
                        break;
                    }
                    //Word you want to change. Currently this code changes word "Solr" to "Solr123"
                    previous.reset();
                    previous.append(string.getBytes("ISO-8859-1"));

                } else if (op.getOperation().equals("TJ")) {
                    COSArray previous = (COSArray) tokens.get(j - 1);
                    for (int k = 0; k < previous.size(); k++) {
                        Object arrElement = previous.getObject(k);
                        if (arrElement instanceof COSString) {
                            COSString cosString = (COSString) arrElement;
                            String string = cosString.getString();
                            //                                System.out.println(string);
                            if (string.contains("/00")) {
                                String seq = cycle + "/" + GlobalVar.globalCountGenerator5Digit(sequenceNum);
                                string = string.replaceFirst(string, seq);
                                cosString.reset();
                                cosString.append(string.getBytes("ISO-8859-1"));
                                sequenceNum++;
                                break;
                            }
                            // Currently this code changes word "Solr" to "Solr123"
                            cosString.reset();
                            cosString.append(string.getBytes("ISO-8859-1"));
                            //                                break;
                        }
                    }
                }
            }
        }
        // now that the tokens are updated we will replace the page content stream.
        PDStream updatedStream = new PDStream(doc);
        OutputStream out = updatedStream.createOutputStream();
        ContentStreamWriter tokenWriter = new ContentStreamWriter(out);
        tokenWriter.writeTokens(tokens);
        page.setContents(updatedStream);
    }
}

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