question: static int allParametersAndArgumentsMatchWithDefaultParams ( Parameter [ ] params , ClassNode [ ] args ) { int dist = 0 ; ClassNode ptype = null ; for ( int i = 0 , j = 0 ; i < params . length ; i ++ ) { Parameter param = params [ i ] ; ClassNode paramType = param . getType ( ) ; ClassNode arg = j >= args . length ? null : args [ j ] ; if ( arg == null || ! isAssignableTo ( arg , paramType ) ) { if ( ! param . hasInitialExpression ( ) && ( ptype == null || ! ptype . equals ( paramType ) ) ) { return - 1 ; } ptype = null ; } else { j ++ ; if ( ! paramType . equals ( arg ) ) dist += getDistance ( arg , paramType ) ; if ( param . hasInitialExpression ( ) ) { ptype = arg ; } else { ptype = null ; } } } return dist ; }
target:  Checks that arguments and parameter types match, expecting that the number of parameters is strictly greater than the number of arguments, allowing possible inclusion of default parameters.