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library/net/http/blademaster/binding/default_validator.go

@@ -0,0 +1,45 @@
+package binding
+
+import (
+	"reflect"
+	"sync"
+
+	"gopkg.in/go-playground/validator.v9"
+)
+
+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()
+		if err := v.validate.Struct(obj); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (v *defaultValidator) RegisterValidation(key string, fn validator.Func) error {
+	v.lazyinit()
+	return v.validate.RegisterValidation(key, fn)
+}
+
+func (v *defaultValidator) lazyinit() {
+	v.once.Do(func() {
+		v.validate = validator.New()
+	})
+}
+
+func kindOfData(data interface{}) reflect.Kind {
+	value := reflect.ValueOf(data)
+	valueType := value.Kind()
+	if valueType == reflect.Ptr {
+		valueType = value.Elem().Kind()
+	}
+	return valueType
+}