refactor exprParam #1825
93
internal/statements/expr.go
Normal file
93
internal/statements/expr.go
Normal file
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@ -0,0 +1,93 @@
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// 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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func (expr *Expr) WriteArgs(w *builder.BytesWriter) error {
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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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return nil
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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) Add(name string, arg interface{}) {
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*exprs = append(*exprs, Expr{name, 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) WriteArgs(w *builder.BytesWriter) error {
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for i, expr := range exprs {
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if err := expr.WriteArgs(w); err != nil {
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return err
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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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@ -1,128 +0,0 @@
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// 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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@ -324,9 +324,9 @@ func (statement *Statement) TableName() string {
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// Incr Generate "Update ... Set column = column + arg" statement
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func (statement *Statement) Incr(column string, arg ...interface{}) *Statement {
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if len(arg) > 0 {
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statement.IncrColumns.addParam(column, arg[0])
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statement.IncrColumns.Add(column, arg[0])
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} else {
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statement.IncrColumns.addParam(column, 1)
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statement.IncrColumns.Add(column, 1)
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}
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return statement
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}
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@ -334,9 +334,9 @@ func (statement *Statement) Incr(column string, arg ...interface{}) *Statement {
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// Decr Generate "Update ... Set column = column - arg" statement
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func (statement *Statement) Decr(column string, arg ...interface{}) *Statement {
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if len(arg) > 0 {
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statement.DecrColumns.addParam(column, arg[0])
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statement.DecrColumns.Add(column, arg[0])
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} else {
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statement.DecrColumns.addParam(column, 1)
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statement.DecrColumns.Add(column, 1)
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}
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return statement
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}
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@ -344,9 +344,9 @@ func (statement *Statement) Decr(column string, arg ...interface{}) *Statement {
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// SetExpr Generate "Update ... Set column = {expression}" statement
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func (statement *Statement) SetExpr(column string, expression interface{}) *Statement {
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if e, ok := expression.(string); ok {
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statement.ExprColumns.addParam(column, statement.dialect.Quoter().Replace(e))
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statement.ExprColumns.Add(column, statement.dialect.Quoter().Replace(e))
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} else {
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statement.ExprColumns.addParam(column, expression)
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statement.ExprColumns.Add(column, expression)
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}
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return statement
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}
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