private boolean isStaticResource ( String uri ) { // find extension int index = uri . lastIndexOf ( ' ' ) ; if ( index == - 1 ) { return false ; // no extension found } String currentExtension = uri . substring ( index ) ; return STATIC_RESOURCE_EXTENSIONS . contains ( currentExtension ) ; }
Method that given a URL checks if the resources is static or not - depending on the request extension like . css . js . png etc .