initial commit

vendor/github.com/go-xorm/builder/cond_eq.go

@@ -0,0 +1,96 @@
+// 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
+}