It's a golang hessian library used by dubbogo.
type Circular struct {
Num int
Previous *Circular
Next *Circular
}
func (Circular) JavaClassName() string {
return "com.company.Circular"
}
c := &Circular{}
c.Num = 12345
c.Previous = c
c.Next = c
e := NewEncoder()
err := e.Encode(c)
if err != nil {
panic(err)
}
bytes := e.Buffer()decodedObject, err := NewDecoder(bytes).Decode()
if err != nil {
panic(err)
}
circular, ok := obj.(*Circular)
// ...Hessian encoder default converts filed names of struct to lower camelcase, but you can customize it using hessian tag.
Example:
type MyUser struct {
UserFullName string `hessian:"user_full_name"`
FamilyPhoneNumber string // default convert to => familyPhoneNumber
}
func (MyUser) JavaClassName() string {
return "com.company.myuser"
}
user := &MyUser{
UserFullName: "username",
FamilyPhoneNumber: "010-12345678",
}
e := hessian.NewEncoder()
err := e.Encode(user)
if err != nil {
panic(err)
}The encoded bytes of the struct MyUser is as following:
00000000 43 12 63 6f 6d 2e 63 6f 6d 70 61 6e 79 2e 6d 79 |C.com.company.my|
00000010 75 73 65 72 92 0e 75 73 65 72 5f 66 75 6c 6c 5f |user..user_full_|
00000020 6e 61 6d 65 11 66 61 6d 69 6c 79 50 68 6f 6e 65 |name.familyPhone|
00000030 4e 75 6d 62 65 72 60 08 75 73 65 72 6e 61 6d 65 |Number`.username|
00000040 0c 30 31 30 2d 31 32 33 34 35 36 37 38 |.010-12345678|
Hessian decoder finds the correct target field though comparing all filed names of struct one by one until matching.
The following example shows the order of the matching rules:
type MyUser struct {
MobilePhone string `hessian:"mobile-phone"`
}
// You must define the tag of struct for lookup filed form encoded binary bytes, in this case：
// 00000000 43 12 63 6f 6d 2e 63 6f 6d 70 61 6e 79 2e 6d 79 |C.com.company.my|
// 00000010 75 73 65 72 91 0c 6d 6f 62 69 6c 65 2d 70 68 6f |user..mobile-pho|
// 00000020 6e 65 60 0b 31 37 36 31 32 33 34 31 32 33 34 |ne`.17612341234|
//
// mobile-phone(tag lookup) => mobilePhone(lowerCameCase) => MobilePhone(SameCase) => mobilephone(lowercase)
// ^ will matched
type MyUser struct {
MobilePhone string
}
// The following encoded binary bytes will be hit automatically:
//
// 00000000 43 12 63 6f 6d 2e 63 6f 6d 70 61 6e 79 2e 6d 79 |C.com.company.my|
// 00000010 75 73 65 72 91 0b 6d 6f 62 69 6c 65 50 68 6f 6e |user..mobilePhon|
// 00000020 65 60 0b 31 37 36 31 32 33 34 31 32 33 34 |e`.17612341234|
//
// mobile-phone(tag lookup) => mobilePhone(lowerCameCase) => MobilePhone(SameCase) => mobilephone(lowercase)
// ^ will matched
//
// 00000000 43 12 63 6f 6d 2e 63 6f 6d 70 61 6e 79 2e 6d 79 |C.com.company.my|
// 00000010 75 73 65 72 91 0b 4d 6f 62 69 6c 65 50 68 6f 6e |user..MobilePhon|
// 00000020 65 60 0b 31 37 36 31 32 33 34 31 32 33 34 |e`.17612341234|
//
// mobile-phone(tag lookup) => mobilePhone(lowerCameCase) => MobilePhone(SameCase) => mobilephone(lowercase)
// ^ will matched
//
// 00000000 43 12 63 6f 6d 2e 63 6f 6d 70 61 6e 79 2e 6d 79 |C.com.company.my|
// 00000010 75 73 65 72 91 0b 6d 6f 62 69 6c 65 70 68 6f 6e |user..mobilephon|
// 00000020 65 60 0b 31 37 36 31 32 33 34 31 32 33 34 |e`.17612341234|
//
// mobile-phone(tag lookup) => mobilePhone(lowerCameCase) => MobilePhone(SameCase) => mobilephone(lowercase)
// ^ will matchedYou can use hessian.SetTagIdentifier to customize tag-identifier of hessian, which takes effect to both encoder and decoder.
Example:
hessian.SetTagIdentifier("json")
type MyUser struct {
UserFullName string `json:"user_full_name"`
FamilyPhoneNumber string // default convert to => familyPhoneNumber
}
func (MyUser) JavaClassName() string {
return "com.company.myuser"
}
user := &MyUser{
UserFullName: "username",
FamilyPhoneNumber: "010-12345678",
}
e := hessian.NewEncoder()
err := e.Encode(user)
if err != nil {
panic(err)
}The encoded bytes of the struct MyUser is as following:
00000000 43 12 63 6f 6d 2e 63 6f 6d 70 61 6e 79 2e 6d 79 |C.com.company.my|
00000010 75 73 65 72 92 0e 75 73 65 72 5f 66 75 6c 6c 5f |user..user_full_|
00000020 6e 61 6d 65 11 66 61 6d 69 6c 79 50 68 6f 6e 65 |name.familyPhone|
00000030 4e 75 6d 62 65 72 60 08 75 73 65 72 6e 61 6d 65 |Number`.username|
00000040 0c 30 31 30 2d 31 32 33 34 35 36 37 38 |.010-12345678|
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