Refactors binding validation

binding/default_validator.go

@@ -0,0 +1,38 @@
+package binding
+
+import (
+	"reflect"
+	"sync"
+
+	"gopkg.in/bluesuncorp/validator.v5"
+)
+
+type defaultValidator struct {
+	once     sync.Once
+	validate *validator.Validate
+}
+
+var _ StructValidator = &defaultValidator{}
+
+func (v *defaultValidator) ValidateStruct(obj interface{}) error {
+	if kindOfData(obj) == reflect.Struct {
+		v.lazyinit()
+		return v.validate.Struct(obj)
+	}
+	return nil
+}
+
+func (v *defaultValidator) lazyinit() {
+	v.once.Do(func() {
+		v.validate = validator.New("binding", validator.BakedInValidators)
+	})
+}
+
+func kindOfData(data interface{}) reflect.Kind {
+	value := reflect.ValueOf(data)
+	valueType := value.Kind()
+	if valueType == reflect.Ptr {
+		valueType = value.Elem().Kind()
+	}
+	return valueType
+}