Ejemplo n.º 1
0
  /**
   * Compares two {@link DirectoryEntry} instances of a POI file system. The directories must
   * contain the same streams with the same names and contents.
   *
   * @param d1 The first directory.
   * @param d2 The second directory.
   * @param msg The method may append human-readable comparison messages to this string buffer.
   * @return <code>true</code> if the directories are equal, else <code>false</code>.
   * @exception MarkUnsupportedException if a POI document stream does not support the mark()
   *     operation.
   * @exception NoPropertySetStreamException if the application tries to create a property set from
   *     a POI document stream that is not a property set stream.
   * @throws UnsupportedEncodingException
   * @exception IOException if any I/O exception occurs.
   */
  private static boolean equal(
      final DirectoryEntry d1, final DirectoryEntry d2, final StringBuffer msg)
      throws NoPropertySetStreamException, MarkUnsupportedException, UnsupportedEncodingException,
          IOException {
    boolean equal = true;
    /* Iterate over d1 and compare each entry with its counterpart in d2. */
    for (final Iterator i = d1.getEntries(); equal && i.hasNext(); ) {
      final Entry e1 = (Entry) i.next();
      final String n1 = e1.getName();
      Entry e2 = null;
      try {
        e2 = d2.getEntry(n1);
      } catch (FileNotFoundException ex) {
        msg.append("Document \"" + e1 + "\" exists, document \"" + e2 + "\" does not.\n");
        equal = false;
        break;
      }

      if (e1.isDirectoryEntry() && e2.isDirectoryEntry())
        equal = equal((DirectoryEntry) e1, (DirectoryEntry) e2, msg);
      else if (e1.isDocumentEntry() && e2.isDocumentEntry())
        equal = equal((DocumentEntry) e1, (DocumentEntry) e2, msg);
      else {
        msg.append(
            "One of \""
                + e1
                + "\" and \""
                + e2
                + "\" is a "
                + "document while the other one is a directory.\n");
        equal = false;
      }
    }

    /* Iterate over d2 just to make sure that there are no entries in d2
     * that are not in d1. */
    for (final Iterator i = d2.getEntries(); equal && i.hasNext(); ) {
      final Entry e2 = (Entry) i.next();
      final String n2 = e2.getName();
      Entry e1 = null;
      try {
        e1 = d1.getEntry(n2);
      } catch (FileNotFoundException ex) {
        msg.append("Document \"" + e2 + "\" exitsts, document \"" + e1 + "\" does not.\n");
        equal = false;
        break;
      }
    }
    return equal;
  }
Ejemplo n.º 2
0
 /**
  * Is this one of the kinds of formats which uses CompObj to store all of their data, eg Star
  * Draw, Star Impress or (older) Works? If not, it's likely an embedded resource
  */
 private static MediaType processCompObjFormatType(DirectoryEntry root) {
   try {
     Entry e = root.getEntry("\u0001CompObj");
     if (e != null && e.isDocumentEntry()) {
       DocumentNode dn = (DocumentNode) e;
       DocumentInputStream stream = new DocumentInputStream(dn);
       byte[] bytes = IOUtils.toByteArray(stream);
       /*
        * This array contains a string with a normal ASCII name of the
        * application used to create this file. We want to search for that
        * name.
        */
       if (arrayContains(bytes, MS_GRAPH_CHART_BYTES)) {
         return MS_GRAPH_CHART;
       } else if (arrayContains(bytes, STAR_DRAW)) {
         return SDA;
       } else if (arrayContains(bytes, STAR_IMPRESS)) {
         return SDD;
       } else if (arrayContains(bytes, WORKS_QUILL96)) {
         return WPS;
       }
     }
   } catch (Exception e) {
     /*
      * "root.getEntry" can throw FileNotFoundException. The code inside
      * "if" can throw IOExceptions. Theoretically. Practically no
      * exceptions will likely ever appear.
      *
      * Swallow all of them. If any occur, we just assume that we can't
      * distinguish between Draw and Impress and return something safe:
      * x-tika-msoffice
      */
   }
   return OLE;
 }