129 lines
2.6 KiB
Go
129 lines
2.6 KiB
Go
// Copyright 2019 The Xorm Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package statements
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import (
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"fmt"
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"strings"
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"xorm.io/builder"
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"xorm.io/xorm/schemas"
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)
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// ErrUnsupportedExprType represents an error with unsupported express type
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type ErrUnsupportedExprType struct {
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tp string
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}
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func (err ErrUnsupportedExprType) Error() string {
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return fmt.Sprintf("Unsupported expression type: %v", err.tp)
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}
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// Expr represents an SQL express
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type Expr struct {
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ColName string
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Arg interface{}
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}
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type exprParams []Expr
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func (exprs exprParams) ColNames() []string {
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var cols = make([]string, 0, len(exprs))
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for _, expr := range exprs {
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cols = append(cols, expr.ColName)
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}
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return cols
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}
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func (exprs exprParams) addParam(colName string, arg interface{}) {
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exprs = append(exprs, Expr{colName, arg})
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}
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func (exprs exprParams) IsColExist(colName string) bool {
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for _, expr := range exprs {
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if strings.EqualFold(schemas.CommonQuoter.Trim(expr.ColName), schemas.CommonQuoter.Trim(colName)) {
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return true
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}
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}
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return false
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}
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func (exprs exprParams) getByName(colName string) (Expr, bool) {
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for _, expr := range exprs {
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if strings.EqualFold(expr.ColName, colName) {
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return expr, true
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}
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}
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return Expr{}, false
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}
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func (exprs exprParams) WriteArgs(w *builder.BytesWriter) error {
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for i, expr := range exprs {
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switch arg := expr.Arg.(type) {
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case *builder.Builder:
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if _, err := w.WriteString("("); err != nil {
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return err
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}
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if err := arg.WriteTo(w); err != nil {
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return err
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}
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if _, err := w.WriteString(")"); err != nil {
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return err
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}
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case string:
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if arg == "" {
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arg = "''"
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}
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if _, err := w.WriteString(fmt.Sprintf("%v", arg)); err != nil {
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return err
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}
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default:
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if _, err := w.WriteString("?"); err != nil {
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return err
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}
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w.Append(arg)
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}
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if i != len(exprs)-1 {
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if _, err := w.WriteString(","); err != nil {
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return err
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}
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}
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}
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return nil
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}
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func (exprs exprParams) writeNameArgs(w *builder.BytesWriter) error {
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for i, expr := range exprs {
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if _, err := w.WriteString(expr.ColName); err != nil {
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return err
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}
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if _, err := w.WriteString("="); err != nil {
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return err
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}
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switch arg := expr.Arg.(type) {
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case *builder.Builder:
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if _, err := w.WriteString("("); err != nil {
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return err
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}
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if err := arg.WriteTo(w); err != nil {
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return err
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}
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if _, err := w.WriteString("("); err != nil {
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return err
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}
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default:
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w.Append(expr.Arg)
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}
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if i+1 != len(exprs) {
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if _, err := w.WriteString(","); err != nil {
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return err
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}
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}
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}
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return nil
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}
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