Future internet applications are becoming bandwidth intensive which demands high capacity optical network infrastructure. The PCE (Path Computation Element) is a central node which computes paths in GMPLS (Generalized Multi Protocol Label Switching) controlled WSON (Wavelength Switched Optical Networks). This work focuses on the idea of switching different path computation algorithms to serve the various path requests of future internet applications. A novel method is proposed to choose the best path computation algorithm according to the current state of the network and the features of the evolving traffic demands.