final String error =
"Missing file rotation strategy element [or|size|date|interval|time]";
throw new ConfigurationException( error );
}
final Configuration confStrategy = confRotation.getChildren()[ 0 ];
final RotateStrategy rotateStrategy = getRotateStrategy( confStrategy );
final FileStrategy fileStrategy = getFileStrategy( confRotation, file );
logtarget =
new RotatingFileTarget( append, formatter, rotateStrategy, fileStrategy );
}