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// 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"
// Incr implements a type used by Eq
type Incr int
// Decr implements a type used by Eq
type Decr int
// Eq defines equals conditions
type Eq map[string]interface{}
var _ Cond = Eq{}
func (eq Eq) opWriteTo(op string, w Writer) error {
var i = 0
for k, v := range eq {
switch v.(type) {
case []int, []int64, []string, []int32, []int16, []int8, []uint, []uint64, []uint32, []uint16, []interface{}:
if err := In(k, v).WriteTo(w); err != nil {
return err
}
case expr:
if _, err := fmt.Fprintf(w, "%s=(", k); err != nil {
return err
}
if err := v.(expr).WriteTo(w); err != nil {
return err
}
if _, err := fmt.Fprintf(w, ")"); err != nil {
return err
}
case *Builder:
if _, err := fmt.Fprintf(w, "%s=(", k); err != nil {
return err
}
if err := v.(*Builder).WriteTo(w); err != nil {
return err
}
if _, err := fmt.Fprintf(w, ")"); err != nil {
return err
}
case Incr:
if _, err := fmt.Fprintf(w, "%s=%s+?", k, k); err != nil {
return err
}
w.Append(int(v.(Incr)))
case Decr:
if _, err := fmt.Fprintf(w, "%s=%s-?", k, k); err != nil {
return err
}
w.Append(int(v.(Decr)))
default:
if _, err := fmt.Fprintf(w, "%s=?", k); err != nil {
return err
}
w.Append(v)
}
if i != len(eq)-1 {
if _, err := fmt.Fprint(w, op); err != nil {
return err
}
}
i = i + 1
}
return nil
}
// WriteTo writes SQL to Writer
func (eq Eq) WriteTo(w Writer) error {
return eq.opWriteTo(" AND ", w)
}
// And implements And with other conditions
func (eq Eq) And(conds ...Cond) Cond {
return And(eq, And(conds...))
}
// Or implements Or with other conditions
func (eq Eq) Or(conds ...Cond) Cond {
return Or(eq, Or(conds...))
}
// IsValid tests if this Eq is valid
func (eq Eq) IsValid() bool {
return len(eq) > 0
}
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