// Copyright 2021 EMQ Technologies Co., Ltd. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package xsql import ( "fmt" "github.com/lf-edge/ekuiper/internal/binder/function" "github.com/lf-edge/ekuiper/pkg/api" "github.com/lf-edge/ekuiper/pkg/ast" ) func validateFuncs(funcName string, args []ast.Expr) error { f, err := function.Function(funcName) if f != nil { var targs []interface{} for _, arg := range args { targs = append(targs, arg) } if mf, ok := f.(MultiFunc); ok { return mf.ValidateWithName(args, funcName) } else { return f.Validate(targs) } } else { if err != nil { return err } else { return fmt.Errorf("function %s not found", funcName) } } } func ExecFunc(funcName string, f api.Function, args []interface{}, fctx api.FunctionContext) (interface{}, bool) { var targs []interface{} for _, arg := range args { targs = append(targs, arg) } if mf, ok := f.(MultiFunc); ok { return mf.ExecWithName(args, fctx, funcName) } else { return f.Exec(args, fctx) } } // MultiFunc hack for builtin functions that works for multiple functions type MultiFunc interface { ValidateWithName(args []ast.Expr, name string) error ExecWithName(args []interface{}, ctx api.FunctionContext, name string) (interface{}, bool) }