/**
* 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();
}
private void fillMetrics(byte[] touni, IntHashtable widths, int dw) {
try {
PdfContentParser ps = new PdfContentParser(new PRTokeniser(touni));
PdfObject ob = null;
boolean notFound = true;
int nestLevel = 0;
int maxExc = 50;
while ((notFound || nestLevel > 0)) {
try {
ob = ps.readPRObject();
} catch (Exception ex) {
if (--maxExc < 0) break;
continue;
}
if (ob == null) break;
if (ob.type() == PdfContentParser.COMMAND_TYPE) {
if (ob.toString().equals("begin")) {
notFound = false;
nestLevel++;
} else if (ob.toString().equals("end")) {
nestLevel--;
} else if (ob.toString().equals("beginbfchar")) {
while (true) {
PdfObject nx = ps.readPRObject();
if (nx.toString().equals("endbfchar")) break;
String cid = decodeString((PdfString) nx);
String uni = decodeString((PdfString) ps.readPRObject());
if (uni.length() == 1) {
int cidc = cid.charAt(0);
int unic = uni.charAt(uni.length() - 1);
int w = dw;
if (widths.containsKey(cidc)) w = widths.get(cidc);
metrics.put(Integer.valueOf(unic), new int[] {cidc, w});
}
}
} else if (ob.toString().equals("beginbfrange")) {
while (true) {
PdfObject nx = ps.readPRObject();
if (nx.toString().equals("endbfrange")) break;
String cid1 = decodeString((PdfString) nx);
String cid2 = decodeString((PdfString) ps.readPRObject());
int cid1c = cid1.charAt(0);
int cid2c = cid2.charAt(0);
PdfObject ob2 = ps.readPRObject();
if (ob2.isString()) {
String uni = decodeString((PdfString) ob2);
if (uni.length() == 1) {
int unic = uni.charAt(uni.length() - 1);
for (; cid1c <= cid2c; cid1c++, unic++) {
int w = dw;
if (widths.containsKey(cid1c)) w = widths.get(cid1c);
metrics.put(Integer.valueOf(unic), new int[] {cid1c, w});
}
}
} else {
PdfArray a = (PdfArray) ob2;
for (int j = 0; j < a.size(); ++j, ++cid1c) {
String uni = decodeString(a.getAsString(j));
if (uni.length() == 1) {
int unic = uni.charAt(uni.length() - 1);
int w = dw;
if (widths.containsKey(cid1c)) w = widths.get(cid1c);
metrics.put(Integer.valueOf(unic), new int[] {cid1c, w});
}
}
}
}
}
}
}
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
