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// Copyright 2019 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package xorm
import (
"fmt"
"strings"
"xorm.io/builder"
)
type ErrUnsupportedExprType struct {
tp string
}
func (err ErrUnsupportedExprType) Error() string {
return fmt.Sprintf("Unsupported expression type: %v", err.tp)
}
type exprParam struct {
colName string
arg interface{}
}
type exprParams struct {
colNames []string
args []interface{}
}
func (exprs *exprParams) Len() int {
return len(exprs.colNames)
}
func (exprs *exprParams) addParam(colName string, arg interface{}) {
exprs.colNames = append(exprs.colNames, colName)
exprs.args = append(exprs.args, arg)
}
func (exprs *exprParams) isColExist(colName string) bool {
for _, name := range exprs.colNames {
if strings.EqualFold(trimQuote(name), trimQuote(colName)) {
return true
}
}
return false
}
func (exprs *exprParams) getByName(colName string) (exprParam, bool) {
for i, name := range exprs.colNames {
if strings.EqualFold(name, colName) {
return exprParam{name, exprs.args[i]}, true
}
}
return exprParam{}, false
}
func (exprs *exprParams) writeArgs(w *builder.BytesWriter) error {
for i, expr := range exprs.args {
switch arg := expr.(type) {
case *builder.Builder:
if _, err := w.WriteString("("); err != nil {
return err
}
if err := arg.WriteTo(w); err != nil {
return err
}
if _, err := w.WriteString(")"); err != nil {
return err
}
default:
if _, err := w.WriteString(fmt.Sprintf("%v", arg)); err != nil {
return err
}
}
if i != len(exprs.args)-1 {
if _, err := w.WriteString(","); err != nil {
return err
}
}
}
return nil
}
func (exprs *exprParams) writeNameArgs(w *builder.BytesWriter) error {
for i, colName := range exprs.colNames {
if _, err := w.WriteString(colName); err != nil {
return err
}
if _, err := w.WriteString("="); err != nil {
return err
}
switch arg := exprs.args[i].(type) {
case *builder.Builder:
if _, err := w.WriteString("("); err != nil {
return err
}
if err := arg.WriteTo(w); err != nil {
return err
}
if _, err := w.WriteString("("); err != nil {
return err
}
default:
w.Append(exprs.args[i])
}
if i+1 != len(exprs.colNames) {
if _, err := w.WriteString(","); err != nil {
return err
}
}
}
return nil
}
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