Logs can be retrieved based on username, time period, action performed, and specific resource. For this purpose, the method getLogs returns an array while the method getLogCollection returns a collection.
LogEntry[] logentries = registry.getLogs("c1/c2/r3", LogEntry.ALL, "admin", new Date(2010,4,7), new Date(2010,4,12), true);
LogEntryCollection leCollection = registry.getLogCollection("c1/c2/r3", LogEntry.ALL, "admin", new Date(2010,4,7), new Date(2010,4,12), true);
For more information about logs, see Logging and System Logs.