예제 #1
0
파일: DBAbstract.java 프로젝트: joval/JDBM3
  public synchronized void deleteCollection(String name) {
    try {
      long nameDirectory_recid = getRoot(NAME_DIRECTORY_ROOT);
      if (nameDirectory_recid == 0) throw new IOException("Collection not found");
      HTree<String, Long> dir = fetch(nameDirectory_recid);

      Long recid = dir.get(name);
      if (recid == null) throw new IOException("Collection not found");

      Object o = fetch(recid);
      // we can not use O instance since it is not correctly initialized
      if (o instanceof LinkedList2) {
        LinkedList2 l = (LinkedList2) o;
        l.clear();
        delete(l.rootRecid);
      } else if (o instanceof BTree) {
        ((BTree) o).clear();
      } else if (o instanceof HTree) {
        HTree t = (HTree) o;
        t.clear();
        HTreeDirectory n = (HTreeDirectory) fetch(t.rootRecid, t.SERIALIZER);
        n.deleteAllChildren();
        delete(t.rootRecid);
      } else {
        throw new InternalError("unknown collection type: " + (o == null ? null : o.getClass()));
      }
      delete(recid);
      collections.remove(name);

      dir.remove(name);

    } catch (IOException e) {
      throw new IOError(e);
    }
  }
예제 #2
0
파일: DBAbstract.java 프로젝트: joval/JDBM3
  public synchronized <K> List<K> getLinkedList(String name) {
    Object o = getCollectionInstance(name);
    if (o != null) return (List<K>) o;

    try {
      long recid = getNamedObject(name);
      if (recid == 0) return null;
      LinkedList2<K> list = (LinkedList2<K>) fetch(recid);
      list.setPersistenceContext(this);
      collections.put(name, new WeakReference<Object>(list));
      return list;
    } catch (IOException e) {
      throw new IOError(e);
    }
  }