First submission of code

ecode/ecode.go

@@ -0,0 +1,112 @@
+package ecode
+
+import (
+	"fmt"
+	"strconv"
+)
+
+var (
+	_codes = make(map[int]ECodes, 0)
+)
+
+type ECodes interface {
+	// Code Status get error code.
+	Code() int
+
+	ErrorType() errorType
+
+	Description() string
+
+	// Values get formatted message parameter,it may be nil.
+	Values() []string
+
+	ErrorUri() string
+
+	Error() string
+
+	SetDescription(msg string) ECodes
+	SetDescriptionf(a ...string) ECodes
+	SetErrorUri(url string) ECodes
+}
+
+func New(e int, eType errorType, description string, errorUri string) *ecode {
+	if _, ok := _codes[e]; ok {
+		panic(fmt.Sprintf("ecode: %d already exist", e))
+	}
+	return &ecode{
+		errorType:   eType,
+		code:        e,
+		description: description,
+		errorUri:    errorUri,
+		f:           nil,
+	}
+}
+
+func Cause(e error) ECodes {
+	ec, ok := e.(ECodes)
+	if ok {
+		return ec
+	}
+	return ServerError.SetDescription(e.Error())
+}
+
+type ecode struct {
+	errorType   errorType
+	code        int
+	description string
+	errorUri    string
+	f           []string
+}
+
+func (c *ecode) ErrorType() errorType {
+	return c.errorType
+}
+
+func (c *ecode) Error() string {
+	return strconv.Itoa(c.code)
+}
+func (c *ecode) Code() int { return c.code }
+
+func (c *ecode) Values() []string {
+	return c.f
+}
+func (c *ecode) Description() string {
+	if c.description != "" {
+		if c.f != nil {
+			return fmt.Sprintf(c.description, c.f)
+		}
+		return c.description
+	}
+	return c.description
+}
+func (c *ecode) ErrorUri() string {
+	return c.errorUri
+}
+
+func (c *ecode) SetDescription(msg string) ECodes {
+	return &ecode{
+		errorType:   c.errorType,
+		code:        c.code,
+		description: msg,
+		errorUri:    c.errorUri,
+		f:           c.f,
+	}
+}
+func (c *ecode) SetDescriptionf(a ...string) ECodes {
+	return &ecode{
+		errorType:   c.errorType,
+		code:        c.code,
+		description: c.description,
+		errorUri:    c.errorUri,
+		f:           a,
+	}
+}
+func (c *ecode) SetErrorUri(url string) ECodes {
+	return &ecode{
+		errorType:   c.errorType,
+		code:        c.code,
+		description: c.description,
+		errorUri:    url,
+		f:           c.f,
+	}
+}