Java in a Nutshell, 5th Edition

Name

Filter

Synopsis

This interface defines the method that a class must implement if it wants to filter log messages for a Logger or Handler class. isLoggable( ) should return true if the specified LogRecord contains information that should be logged. It should return false if the LogRecord should be filtered out not appear in any destination log. Note that both Logger and Handler provide built-in filtering based on the severity level of the LogRecord. This Filter interface exists to provide a customized filtering capability.

public interface Filter {
// Public Instance Methods
     boolean isLoggable(LogRecord record);  
}

Passed To

Handler.setFilter( ), Logger.setFilter( )

Returned By

Handler.getFilter( ), Logger.getFilter( )