62 lines
1.0 KiB
Go
62 lines
1.0 KiB
Go
// Copyright 2016 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 builder
|
|
|
|
import "fmt"
|
|
|
|
type condAnd []Cond
|
|
|
|
var _ Cond = condAnd{}
|
|
|
|
// And generates AND conditions
|
|
func And(conds ...Cond) Cond {
|
|
var result = make(condAnd, 0, len(conds))
|
|
for _, cond := range conds {
|
|
if cond == nil || !cond.IsValid() {
|
|
continue
|
|
}
|
|
result = append(result, cond)
|
|
}
|
|
return result
|
|
}
|
|
|
|
func (and condAnd) WriteTo(w Writer) error {
|
|
for i, cond := range and {
|
|
_, isOr := cond.(condOr)
|
|
_, isExpr := cond.(expr)
|
|
wrap := isOr || isExpr
|
|
if wrap {
|
|
fmt.Fprint(w, "(")
|
|
}
|
|
|
|
err := cond.WriteTo(w)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if wrap {
|
|
fmt.Fprint(w, ")")
|
|
}
|
|
|
|
if i != len(and)-1 {
|
|
fmt.Fprint(w, " AND ")
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (and condAnd) And(conds ...Cond) Cond {
|
|
return And(and, And(conds...))
|
|
}
|
|
|
|
func (and condAnd) Or(conds ...Cond) Cond {
|
|
return Or(and, Or(conds...))
|
|
}
|
|
|
|
func (and condAnd) IsValid() bool {
|
|
return len(and) > 0
|
|
}
|