README
¶
json
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A simple json marshal and unmarshal by customized tags (exported fields only).
If i miss something or you have something interesting, please be part of this project. Let me know! My contact is at the end.
With support for
- Customized tags
- Ignore field using tag "-"
Dependecy Management
Dep
Project dependencies are managed using Dep. Read more about Dep.
- Install dependencies:
dep ensure - Update dependencies:
dep ensure -update
Go
go get github.com/joaosoft/json
Usage
This examples are available in the project at json/examples
Code
type address struct {
Ports []int `db.read:"ports"`
Street string `db.read:"street"`
Number float64 `db.write:"number"`
Map map[string]string `db:"map"`
}
type person struct {
Name string `db:"name"`
Age int `db:"age"`
Address *address `db:"address"`
Numbers []int `db:"numbers"`
Others map[string]*address `db:"others"`
Addresses []*address `db:"addresses"`
}
type contents []content
type content struct {
Data *j.RawMessage `db:"data"`
}
func main() {
marshal()
unmarshal()
}
func marshal() {
fmt.Println("\n\n:: MARSHAL")
marshal_example_1()
marshal_example_2()
}
func unmarshal() {
fmt.Println("\n\n:: UNMARSHAL")
unmarshal_example_1()
unmarshal_example_2()
unmarshal_example_3()
unmarshal_example_4()
unmarshal_example_5()
unmarshal_example_6()
unmarshal_example_7()
}
func marshal_example_1() {
addr := &address{
Street: "street one",
Number: 1.2,
Map: map[string]string{`"ola" "joao"`: `"adeus" "joao"`, "c": "d"},
}
example := person{
Name: "joao",
Age: 30,
Address: addr,
Numbers: []int{1, 2, 3},
Others: map[string]*address{`"ola" "joao"`: addr, "c": addr},
Addresses: []*address{addr, addr},
}
// with tags "db" and "db.read"
// marshal
bytes, err := json.Marshal(example, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Println(string(bytes))
}
func marshal_example_2() {
addr := &address{
Street: "street one",
Number: 1.2,
Map: map[string]string{`"ola" "joao"`: `"adeus" "joao"`, "c": "d"},
}
example := person{
Name: "joao",
Age: 30,
Address: addr,
Numbers: []int{1, 2, 3},
Others: map[string]*address{`"ola" "joao"`: addr, "c": addr},
Addresses: []*address{addr, addr},
}
// with tags "db" and "db.write"
// marshal
bytes, err := json.Marshal(example, "db", "db.write")
if err != nil {
panic(err)
}
fmt.Println(string(bytes))
}
func unmarshal_example_1() {
addr := &address{
Street: "street one",
Number: 1.2,
Map: map[string]string{`"ola" "joao"`: `"adeus" "joao"`, "c": "d"},
}
example := person{
Name: "joao",
Age: 30,
Address: addr,
Numbers: []int{1, 2, 3},
Others: map[string]*address{`"ola" "joao"`: addr, "c": addr},
Addresses: []*address{addr, addr},
}
// with tags "db" and "db.read"
// marshal
bytes, err := json.Marshal(example, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Println(string(bytes))
// unmarshal
var newExample person
err = json.Unmarshal(bytes, &newExample, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n:: Example: %+v", newExample)
fmt.Printf("\n:: Address: %+v\n\n\n", newExample.Address)
}
func unmarshal_example_2() {
addr := &address{
Street: "street one",
Number: 1.2,
Map: map[string]string{`"ola" "joao"`: `"adeus" "joao"`, "c": "d"},
}
example := person{
Name: "joao",
Age: 30,
Address: addr,
Numbers: []int{1, 2, 3},
Others: map[string]*address{`"ola" "joao"`: addr, "c": addr},
Addresses: []*address{addr, addr},
}
// with tags "db" and "db.write"
// marshal
bytes, err := json.Marshal(example, "db", "db.write")
if err != nil {
panic(err)
}
fmt.Println(string(bytes))
// unmarshal
newExample := person{}
err = json.Unmarshal(bytes, &newExample, "db", "db.write")
if err != nil {
panic(err)
}
fmt.Printf("\n:: Example: %+v", newExample)
fmt.Printf("\n:: Address: %+v", newExample.Address)
for key, value := range newExample.Others {
fmt.Printf("\n:: Others Key: %+v", key)
fmt.Printf("\n:: Others Value: %+v", value)
}
for _, value := range newExample.Addresses {
fmt.Printf("\n:: Addresses: %+v", value)
}
}
func unmarshal_example_3() {
addr := &address{
Street: "street one",
Number: 1.2,
Map: map[string]string{`"ola" "joao"`: `"adeus" "joao"`, "c": "d"},
}
example := person{
Name: "joao",
Age: 30,
Address: addr,
Numbers: []int{1, 2, 3},
Others: map[string]*address{`"ola" "joao"`: addr, "c": addr},
Addresses: []*address{addr, addr},
}
persons := []*person{&example, &example}
bytes, err := json.Marshal(persons, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n\n %s", string(bytes))
// unmarshal
var newPersons []*person
err = json.Unmarshal(bytes, &newPersons, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n:: LEN: %d", len(newPersons))
fmt.Printf("\n:: Example 1: %+v", newPersons[0])
fmt.Printf("\n:: Example 1 Address: %+v", newPersons[0].Address)
fmt.Printf("\n:: Example 2: %+v", newPersons[1])
}
func unmarshal_example_4() {
example := []int{1, 2, 3}
bytes, err := json.Marshal(example, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n\n %s", string(bytes))
// unmarshal
var newExample []int
err = json.Unmarshal(bytes, &newExample, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n:: LEN: %d", len(newExample))
fmt.Printf("\n:: Example: %+v", newExample)
}
func unmarshal_example_5() {
example := []int{}
bytes, err := json.Marshal(example, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n\n %s", string(bytes))
// unmarshal
var newExample []int
err = json.Unmarshal(bytes, &newExample, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n:: LEN: %d", len(newExample))
fmt.Printf("\n:: Example: %+v", newExample)
}
func unmarshal_example_6() {
example := map[string]int{"one": 1, "two": 2, "three": 3}
bytes, err := json.Marshal(example, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n\n %s", string(bytes))
// unmarshal
var newExample map[string]int
err = json.Unmarshal(bytes, &newExample, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n:: LEN: %d", len(newExample))
fmt.Printf("\n:: Example: %+v", newExample)
}
func unmarshal_example_7() {
bytes := []byte(`[{"data":{"test": "one", "test": "two"}}]`)
// unmarshal
var newExample contents
err := json.Unmarshal(bytes, &newExample, "db", "db.read")
if err != nil {
panic(err)
}
fmt.Printf("\n:: LEN: %d", len(newExample))
fmt.Printf("\n:: Example: %+v", newExample[0].Data)
}
Result:
:: MARSHAL
{"name":"joao","age":30,"address":{"ports":null,"street":"street one","map":{"c":"d","\"ola\" \"joao\"":"\"adeus\" \"joao\""}},"numbers":[1,2,3],"others":{"\"ola\" \"joao\"":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},"c":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}},"addresses":[{"ports":null,"street":"street one","map":{"c":"d","\"ola\" \"joao\"":"\"adeus\" \"joao\""}},{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}]}
{"name":"joao","age":30,"address":{"number":1.2,"map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},"numbers":[1,2,3],"others":{"\"ola\" \"joao\"":{"number":1.2,"map":{"c":"d","\"ola\" \"joao\"":"\"adeus\" \"joao\""}},"c":{"number":1.2,"map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}},"addresses":[{"number":1.2,"map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},{"number":1.2,"map":{"c":"d","\"ola\" \"joao\"":"\"adeus\" \"joao\""}}]}
:: UNMARSHAL
{"name":"joao","age":30,"address":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},"numbers":[1,2,3],"others":{"c":{"ports":null,"street":"street one","map":{"c":"d","\"ola\" \"joao\"":"\"adeus\" \"joao\""}},"\"ola\" \"joao\"":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}},"addresses":[{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},{"ports":null,"street":"street one","map":{"c":"d","\"ola\" \"joao\"":"\"adeus\" \"joao\""}}]}
:: Example: {Name:joao Age:30 Address:0xc000086200 Numbers:[1 2 3] Others:map[c:0xc000086300 "ola" "joao":0xc000086340 addresses:0xc000086380] Addresses:[0xc0000863c0 0xc000086400]}
:: Address: &{Ports:[] Street:street one Number:0 Map:map["ola" "joao":"adeus" "joao" c:d]}
{"name":"joao","age":30,"address":{"number":1.2,"map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},"numbers":[1,2,3],"others":{"\"ola\" \"joao\"":{"number":1.2,"map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},"c":{"number":1.2,"map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}},"addresses":[{"number":1.2,"map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},{"number":1.2,"map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}]}
:: Example: {Name:joao Age:30 Address:0xc000086500 Numbers:[1 2 3] Others:map[addresses:0xc0000865c0 "ola" "joao":0xc000086600 c:0xc000086640] Addresses:[0xc000086680 0xc0000866c0]}
:: Address: &{Ports:[] Street: Number:1.2 Map:map["ola" "joao":"adeus" "joao" c:d]}
:: Others Key: addresses
:: Others Value: &{Ports:[] Street: Number:1.2 Map:map[c:d "ola" "joao":"adeus" "joao"]}
:: Others Key: "ola" "joao"
:: Others Value: &{Ports:[] Street: Number:1.2 Map:map["ola" "joao":"adeus" "joao" c:d]}
:: Others Key: c
:: Others Value: &{Ports:[] Street: Number:1.2 Map:map["ola" "joao":"adeus" "joao" c:d]}
:: Addresses: &{Ports:[] Street: Number:1.2 Map:map["ola" "joao":"adeus" "joao" c:d]}
:: Addresses: &{Ports:[] Street: Number:1.2 Map:map["ola" "joao":"adeus" "joao" c:d]}
[{"name":"joao","age":30,"address":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},"numbers":[1,2,3],"others":{"\"ola\" \"joao\"":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},"c":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}},"addresses":[{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}]},{"name":"joao","age":30,"address":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},"numbers":[1,2,3],"others":{"\"ola\" \"joao\"":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},"c":{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}},"addresses":[{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}},{"ports":null,"street":"street one","map":{"\"ola\" \"joao\"":"\"adeus\" \"joao\"","c":"d"}}]}]
:: LEN: 2
:: Example 1: &{Name:joao Age:30 Address:0xc000086940 Numbers:[1 2 3] Others:map[addresses:0xc000086a40 "ola" "joao":0xc000086a80 c:0xc000086ac0] Addresses:[0xc000086b00 0xc000086b40]}
:: Example 1 Address: &{Ports:[] Street:street one Number:0 Map:map["ola" "joao":"adeus" "joao" c:d]}
:: Example 2: &{Name:joao Age:30 Address:0xc000086b80 Numbers:[1 2 3] Others:map["ola" "joao":0xc000086c80 c:0xc000086cc0 addresses:0xc000086d00] Addresses:[0xc000086d40 0xc000086d80]}
[1,2,3]
:: LEN: 3
:: Example: [1 2 3]
[]
:: LEN: 0
:: Example: []
{"one":1,"two":2,"three":3}
:: LEN: 3
:: Example: map[three:3 one:1 two:2]
:: LEN: 1
:: Example: &[123 34 116 101 115 116 34 58 32 34 111 110 101 34 44 32 34 116 101 115 116 34 58 32 34 116 119 111 34 125]
Known issues
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LinkedIn: https://www.linkedin.com/in/jo%C3%A3o-ribeiro-b2775438/
If you have something to add, please let me know joaosoft@gmail.com
Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
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var ( TypeString = reflect.TypeOf("") TypeFloat64 = reflect.TypeOf(0.0) TypeBoolean = reflect.TypeOf(true) TypeTimestamp = reflect.TypeOf(&t) )
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var (
ErrorInvalidPointer = errors.New("the object isn't a pointer")
)
Functions ¶
Types ¶
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