Example #1
0
    public String hasSameContent(JarFile2 file, JarEntry entry) throws IOException {

      String thisName = null;

      Long crcL = new Long(entry.getCrc());

      // check if this jar contains files with the passed in entry's crc
      if (_crcToEntryMap.containsKey(crcL)) {
        // get the Linked List with files with the crc
        LinkedList ll = (LinkedList) _crcToEntryMap.get(crcL);
        // go through the list and check for content match
        ListIterator li = ll.listIterator(0);
        if (li != null) {
          while (li.hasNext()) {
            JarEntry thisEntry = (JarEntry) li.next();

            // check for content match
            InputStream oldIS = getJarFile().getInputStream(thisEntry);
            InputStream newIS = file.getJarFile().getInputStream(entry);

            if (!differs(oldIS, newIS)) {
              thisName = thisEntry.getName();
              return thisName;
            }
          }
        }
      }

      return thisName;
    }
Example #2
0
    public boolean contains(JarFile2 f, JarEntry e) throws IOException {

      JarEntry thisEntry = getEntryByName(e.getName());

      // Look up name in 'this' Jar2File - if not exist return false
      if (thisEntry == null) return false;

      // Check CRC - if no match - return false
      if (thisEntry.getCrc() != e.getCrc()) return false;

      // Check contents - if no match - return false
      InputStream oldIS = getJarFile().getInputStream(thisEntry);
      InputStream newIS = f.getJarFile().getInputStream(e);
      boolean retValue = differs(oldIS, newIS);

      return !retValue;
    }
Example #3
0
    private void index() throws IOException {
      Enumeration entries = _jar.entries();

      _nameToEntryMap = new HashMap();
      _crcToEntryMap = new HashMap();

      _entries = new ArrayList();
      if (_debug) {
        System.out.println("indexing: " + _jar.getName());
      }
      if (entries != null) {
        while (entries.hasMoreElements()) {
          JarEntry entry = (JarEntry) entries.nextElement();

          long crc = entry.getCrc();

          Long crcL = new Long(crc);

          if (_debug) {
            System.out.println("\t" + entry.getName() + " CRC " + crc);
          }

          _nameToEntryMap.put(entry.getName(), entry);
          _entries.add(entry);

          // generate the CRC to entries map
          if (_crcToEntryMap.containsKey(crcL)) {
            // key exist, add the entry to the correcponding
            // linked list

            // get the linked list
            LinkedList ll = (LinkedList) _crcToEntryMap.get(crcL);

            // put in the new entry
            ll.add(entry);

            // put it back in the hash map
            _crcToEntryMap.put(crcL, ll);
          } else {
            // create a new entry in the hashmap for the new key

            // first create the linked list and put in the new
            // entry
            LinkedList ll = new LinkedList();
            ll.add(entry);

            // create the new entry in the hashmap
            _crcToEntryMap.put(crcL, ll);
          }
        }
      }
    }