/** extracts attachments from PDF File */
  @SuppressWarnings("unchecked")
  protected Map extractAttachments(PdfReader reader) throws IOException {
    Map fileMap = new HashMap();
    PdfDictionary catalog = reader.getCatalog();
    PdfDictionary names = (PdfDictionary) PdfReader.getPdfObject(catalog.get(PdfName.NAMES));
    if (names != null) {
      PdfDictionary embFiles =
          (PdfDictionary) PdfReader.getPdfObject(names.get(new PdfName("EmbeddedFiles")));
      if (embFiles != null) {
        HashMap embMap = PdfNameTree.readTree(embFiles);
        for (Iterator i = embMap.values().iterator(); i.hasNext(); ) {
          PdfDictionary filespec = (PdfDictionary) PdfReader.getPdfObject((PdfObject) i.next());
          Object fileInfo[] = unpackFile(reader, filespec);
          if (fileMap.containsKey(fileInfo[0])) {
            throw new RuntimeException(DUPLICATE_FILE_NAMES);
          }
          fileMap.put(fileInfo[0], fileInfo[1]);
        }
      }
    }
    for (int k = 1; k <= reader.getNumberOfPages(); ++k) {
      PdfArray annots = (PdfArray) PdfReader.getPdfObject(reader.getPageN(k).get(PdfName.ANNOTS));
      if (annots == null) {
        continue;
      }
      for (Iterator i = annots.getArrayList().listIterator(); i.hasNext(); ) {
        PdfDictionary annot = (PdfDictionary) PdfReader.getPdfObject((PdfObject) i.next());
        PdfName subType = (PdfName) PdfReader.getPdfObject(annot.get(PdfName.SUBTYPE));
        if (!PdfName.FILEATTACHMENT.equals(subType)) {
          continue;
        }
        PdfDictionary filespec = (PdfDictionary) PdfReader.getPdfObject(annot.get(PdfName.FS));
        Object fileInfo[] = unpackFile(reader, filespec);
        if (fileMap.containsKey(fileInfo[0])) {
          throw new RuntimeException(DUPLICATE_FILE_NAMES);
        }

        fileMap.put(fileInfo[0], fileInfo[1]);
      }
    }

    return fileMap;
  }
示例#2
0
 /**
  * A factory for fast construction of this class. The constructed object will be a wrapper around
  * the specified <code>List</code>. The calling method must ensure that the <code>List</code> is
  * never externally modified, in order to meet the immutability requirement of {@link PdfObject
  * PdfObject}.
  *
  * @param a the <code>List</code> to be used to back this array.
  * @return the constructed object.
  */
 protected static PdfArray wrap(List a) {
   PdfArray pa = new PdfArray();
   pa._a = Collections.unmodifiableList(a);
   return pa;
 }