Example usage for com.itextpdf.text.pdf PdfLiteral getPosLength

Introduction

In this page you can find the example usage for com.itextpdf.text.pdf PdfLiteral getPosLength.

Prototype

public int getPosLength() 

Source Link

Document

Getter for property posLength.

Usage

From source file:com.swisscom.ais.itext.PDF.java

License:Open Source License

/**
 * Add a signature to pdf document/*  w w w  .  java 2s .c  om*/
 *
 * @param externalSignature  The extern generated signature
 * @param estimatedSize      Size of external signature
 * @throws Exception 
 */
public void createSignedPdf(@Nonnull byte[] externalSignature, int estimatedSize) throws Exception {
    // Check if source pdf is not protected by a certification
    if (pdfReader.getCertificationLevel() == PdfSignatureAppearance.CERTIFIED_NO_CHANGES_ALLOWED)
        throw new Exception(
                "Could not apply signature because source file contains a certification that does not allow any changes to the document");

    if (Soap._debugMode) {
        System.out.println("\nEstimated SignatureSize: " + estimatedSize);
        System.out.println("Actual    SignatureSize: " + externalSignature.length);
        System.out.println("Remaining Size         : " + (estimatedSize - externalSignature.length));
    }

    if (estimatedSize < externalSignature.length) {
        throw new IOException(
                "\nNot enough space for signature (" + (estimatedSize - externalSignature.length) + " bytes)");
    }

    PdfLiteral pdfLiteral = (PdfLiteral) pdfSignature.get(PdfName.CONTENTS);
    byte[] outc = new byte[(pdfLiteral.getPosLength() - 2) / 2];

    Arrays.fill(outc, (byte) 0);

    System.arraycopy(externalSignature, 0, outc, 0, externalSignature.length);
    PdfDictionary dic2 = new PdfDictionary();
    dic2.put(PdfName.CONTENTS, new PdfString(outc).setHexWriting(true));
    pdfSignatureAppearance.close(dic2);

    // Save to file
    OutputStream outputStream = new FileOutputStream(outputFilePath);
    byteArrayOutputStream.writeTo(outputStream);

    if (Soap._debugMode) {
        System.out.println("\nOK writing signature to " + outputFilePath);
    }

    byteArrayOutputStream.close();
    outputStream.close();
}

---