From cf7a05f80f68b5b1c8bcc0089679dd497cec2506 Mon Sep 17 00:00:00 2001
From: =Corey Hulen <corey@hulen.com>
Date: Sun, 14 Jun 2015 23:53:32 -0800
Subject: first commit

---
 .../awslabs/aws-sdk-go/aws/param_validator.go      | 80 ++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/param_validator.go

(limited to 'Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/param_validator.go')

diff --git a/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/param_validator.go b/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/param_validator.go
new file mode 100644
index 000000000..e1cb5cea5
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/awslabs/aws-sdk-go/aws/param_validator.go
@@ -0,0 +1,80 @@
+package aws
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+func ValidateParameters(r *Request) {
+	if r.ParamsFilled() {
+		v := validator{errors: []string{}}
+		v.validateAny(reflect.ValueOf(r.Params), "")
+
+		if count := len(v.errors); count > 0 {
+			format := "%d validation errors:\n- %s"
+			msg := fmt.Sprintf(format, count, strings.Join(v.errors, "\n- "))
+			r.Error = APIError{Code: "InvalidParameter", Message: msg}
+		}
+	}
+}
+
+type validator struct {
+	errors []string
+}
+
+func (v *validator) validateAny(value reflect.Value, path string) {
+	value = reflect.Indirect(value)
+	if !value.IsValid() {
+		return
+	}
+
+	switch value.Kind() {
+	case reflect.Struct:
+		v.validateStruct(value, path)
+	case reflect.Slice:
+		for i := 0; i < value.Len(); i++ {
+			v.validateAny(value.Index(i), path+fmt.Sprintf("[%d]", i))
+		}
+	case reflect.Map:
+		for _, n := range value.MapKeys() {
+			v.validateAny(value.MapIndex(n), path+fmt.Sprintf("[%q]", n.String()))
+		}
+	}
+}
+
+func (v *validator) validateStruct(value reflect.Value, path string) {
+	prefix := "."
+	if path == "" {
+		prefix = ""
+	}
+
+	for i := 0; i < value.Type().NumField(); i++ {
+		f := value.Type().Field(i)
+		if strings.ToLower(f.Name[0:1]) == f.Name[0:1] {
+			continue
+		}
+		fvalue := value.FieldByName(f.Name)
+
+		notset := false
+		if f.Tag.Get("required") != "" {
+			switch fvalue.Kind() {
+			case reflect.Ptr, reflect.Slice:
+				if fvalue.IsNil() {
+					notset = true
+				}
+			default:
+				if !fvalue.IsValid() {
+					notset = true
+				}
+			}
+		}
+
+		if notset {
+			msg := "missing required parameter: " + path + prefix + f.Name
+			v.errors = append(v.errors, msg)
+		} else {
+			v.validateAny(fvalue, path+prefix+f.Name)
+		}
+	}
+}
-- 
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