118 lines
2.4 KiB
Go
118 lines
2.4 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 xorm
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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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)
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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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type exprParam struct {
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colName string
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arg interface{}
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}
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type exprParams struct {
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colNames []string
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args []interface{}
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}
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func (exprs *exprParams) Len() int {
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return len(exprs.colNames)
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}
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func (exprs *exprParams) addParam(colName string, arg interface{}) {
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exprs.colNames = append(exprs.colNames, colName)
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exprs.args = append(exprs.args, arg)
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}
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func (exprs *exprParams) isColExist(colName string) bool {
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for _, name := range exprs.colNames {
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if strings.EqualFold(trimQuote(name), trimQuote(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) (exprParam, bool) {
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for i, name := range exprs.colNames {
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if strings.EqualFold(name, colName) {
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return exprParam{name, exprs.args[i]}, true
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}
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}
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return exprParam{}, 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.args {
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switch arg := expr.(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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if _, err := w.WriteString(fmt.Sprintf("%v", arg)); err != nil {
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return err
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}
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}
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if i != len(exprs.args)-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, colName := range exprs.colNames {
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if _, err := w.WriteString(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 := exprs.args[i].(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(exprs.args[i])
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}
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if i+1 != len(exprs.colNames) {
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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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