The org.olat.util package provides helpder classes and their functionality used throughout the framework, the managers and the controllers. Following you'll find a brief outline of utility classes whcih might be helpful if you are developping with OLAT.
org.olat.util.bulk: TODO:alex
org.olat.util.cache: Package which provides some implementation of caches used by the DB abstraction layer, the group management and the base security package. See the section on caches for details.
org.olat.util.component: TODO:alex
org.olat.util.controller: TODO:alex
org.olat.util.event: Package which provides a simple event handling system, described in more detail in the section on events.
org.olat.util.i18n: This package handles all i18n within OLAT. See the section on i18n for details.
org.olat.util.locks: Package which provides a manager to handle locks. A workflow may set/remove locks to prevent multiple users from accessing some functionality within OLAT. Locks are persisted accross sessions.
org.olat.util.mail: Contains Emailer, a class providing basic email functionality.
org.olat.util.memento: TODO:alex
org.olat.util.nodes: Provides classes to represent a simple node structure and a helper class NodeHelper to manipulate such structures.
org.olat.util.prefs: Package whcih provides structures persistence classes for handling various persistent preferences.
org.olat.util.radeox: Package extending the Radeox wiki markup.
org.olat.util.rss: Helper classes for handling RSS data.
org.olat.util.storage: TODO:alex
org.olat.util.traversal: Package providing helpder classes for traversing structures.
org.olat.util.tree: Package providing helpder classess to work on tree structures.
org.olat.util.vfs: Implementation of the virtual filesystem. See section on virtual filesystem for details.
org.olat.util.xml: TODO:alex