/**
* Extracts document level attachments
*
* @param filename a file from which document level attachments will be extracted
* @throws IOException
*/
public void extractDocLevelAttachments(String filename) throws IOException {
PdfReader reader = new PdfReader(filename);
PdfDictionary root = reader.getCatalog();
PdfDictionary documentnames = root.getAsDict(PdfName.NAMES);
PdfDictionary embeddedfiles = documentnames.getAsDict(PdfName.EMBEDDEDFILES);
PdfArray filespecs = embeddedfiles.getAsArray(PdfName.NAMES);
PdfDictionary filespec;
PdfDictionary refs;
FileOutputStream fos;
PRStream stream;
for (int i = 0; i < filespecs.size(); ) {
filespecs.getAsString(i++);
filespec = filespecs.getAsDict(i++);
refs = filespec.getAsDict(PdfName.EF);
for (PdfName key : refs.getKeys()) {
fos = new FileOutputStream(String.format(PATH, filespec.getAsString(key).toString()));
stream = (PRStream) PdfReader.getPdfObject(refs.getAsIndirectObject(key));
fos.write(PdfReader.getStreamBytes(stream));
fos.flush();
fos.close();
}
}
reader.close();
}
/**
* Switches to the previous revision.
*
* @throws IOException
* @throws GeneralSecurityException
*/
public void switchToPreviousRevision() throws IOException, GeneralSecurityException {
LOGGER.info("Switching to previous revision.");
latestRevision = false;
dss = reader.getCatalog().getAsDict(PdfName.DSS);
Calendar cal = pkcs7.getTimeStampDate();
if (cal == null) cal = pkcs7.getSignDate();
// TODO: get date from signature
signDate = cal.getTime();
List<String> names = fields.getSignatureNames();
if (names.size() > 1) {
signatureName = names.get(names.size() - 2);
reader = new PdfReader(fields.extractRevision(signatureName));
this.fields = reader.getAcroFields();
names = fields.getSignatureNames();
signatureName = names.get(names.size() - 1);
pkcs7 = coversWholeDocument();
LOGGER.info(
String.format(
"Checking %ssignature %s",
pkcs7.isTsp() ? "document-level timestamp " : "", signatureName));
} else {
LOGGER.info("No signatures in revision");
pkcs7 = null;
}
}
/**
* Parses a string with structured content.
*
* @param reader the PdfReader that has access to the PDF file
* @param os the OutputStream to which the resulting xml will be written
* @param charset the charset to encode the data
* @since 5.0.5
*/
public void convertToXml(PdfReader reader, OutputStream os, String charset) throws IOException {
this.reader = reader;
OutputStreamWriter outs = new OutputStreamWriter(os, charset);
out = new PrintWriter(outs);
// get the StructTreeRoot from the root object
PdfDictionary catalog = reader.getCatalog();
PdfDictionary struct = catalog.getAsDict(PdfName.STRUCTTREEROOT);
// Inspect the child or children of the StructTreeRoot
inspectChild(struct.getDirectObject(PdfName.K));
out.flush();
out.close();
}
