# Package org.apache.jorphan.collections

- Interface Summary
  Interface | Description
  --- | ---
  HashTreeTraverser | By implementing this interface, a class can easily traverse a HashTree object, and be notified via callbacks of certain events.

- Class Summary
  Class | Description
  --- | ---
  Data | Use this class to store database-like data.
  HashTree | This class is used to create a tree structure of objects.
  ListedHashTree | ListedHashTree is a different implementation of the `HashTree` collection class.
  SearchByClass<T> | Useful for finding all nodes in the tree that represent objects of a particular type.

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