/**
* Unpacks a file attachment.
*
* @param reader The object that reads the PDF document
* @param filespec The dictonary containing the file specifications
* @throws IOException
*/
protected static Object[] unpackFile(PdfReader reader, PdfDictionary filespec)
throws IOException {
Object arr[] = new Object[2]; // use to store name and file bytes
if (filespec == null) {
return null;
}
PdfName type = (PdfName) PdfReader.getPdfObject(filespec.get(PdfName.TYPE));
if (!PdfName.F.equals(type) && !PdfName.FILESPEC.equals(type)) {
return null;
}
PdfDictionary ef = (PdfDictionary) PdfReader.getPdfObject(filespec.get(PdfName.EF));
if (ef == null) {
return null;
}
PdfString fn = (PdfString) PdfReader.getPdfObject(filespec.get(PdfName.F));
if (fn == null) {
return null;
}
File fLast = new File(fn.toUnicodeString());
PRStream prs = (PRStream) PdfReader.getPdfObject(ef.get(PdfName.F));
if (prs == null) {
return null;
}
byte attachmentByte[] = PdfReader.getStreamBytes(prs);
arr[0] = fLast.getName();
arr[1] = attachmentByte;
return arr;
}
