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Changed the cast methods
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- Added "Check" prefix to the ones that also return an error.
- Removed the "Must" prefix from those that always return a valid value.

fixes issue bitly#15
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AzuraMeta committed Jul 17, 2014
1 parent cfb04ab commit a050385
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Showing 6 changed files with 140 additions and 140 deletions.
140 changes: 70 additions & 70 deletions simplejson.go
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Original file line number Diff line number Diff line change
Expand Up @@ -33,8 +33,8 @@ func New() *Json {
}
}

// Interface returns the underlying data
func (j *Json) Interface() interface{} {
// CheckInterface returns the underlying data
func (j *Json) CheckInterface() interface{} {
return j.data
}

Expand All @@ -56,7 +56,7 @@ func (j *Json) MarshalJSON() ([]byte, error) {
// Set modifies `Json` map by `key` and `value`
// Useful for changing single key/value in a `Json` object easily.
func (j *Json) Set(key string, val interface{}) {
m, err := j.Map()
m, err := j.CheckMap()
if err != nil {
return
}
Expand Down Expand Up @@ -104,7 +104,7 @@ func (j *Json) SetPath(branch []string, val interface{}) {

// Del modifies `Json` map by deleting `key` if it is present.
func (j *Json) Del(key string) {
m, err := j.Map()
m, err := j.CheckMap()
if err != nil {
return
}
Expand All @@ -115,7 +115,7 @@ func (j *Json) Del(key string) {
// for `key` in its `map` representation
// and a bool identifying success or failure
func (j *Json) getKey(key string) (*Json, bool) {
m, err := j.Map()
m, err := j.CheckMap()
if err == nil {
if val, ok := m[key]; ok {
return &Json{val}, true
Expand All @@ -128,7 +128,7 @@ func (j *Json) getKey(key string) (*Json, bool) {
// for `index` in its `array` representation
// and a bool identifying success or failure
func (j *Json) getIndex(index int) (*Json, bool) {
a, err := j.Array()
a, err := j.CheckArray()
if err == nil {
if len(a) > index {
return &Json{a[index]}, true
Expand Down Expand Up @@ -175,9 +175,9 @@ func (j *Json) CheckGet(branch ...interface{}) (*Json, bool) {
return jin, true
}

// JsonMap returns a copy of a Json map, but with values as Jsons
func (j *Json) JsonMap() (map[string]*Json, error) {
m, err := j.Map()
// CheckJsonMap returns a copy of a Json map, but with values as Jsons
func (j *Json) CheckJsonMap() (map[string]*Json, error) {
m, err := j.CheckMap()
if err != nil {
return nil, err
}
Expand All @@ -188,9 +188,9 @@ func (j *Json) JsonMap() (map[string]*Json, error) {
return jm, nil
}

// JsonArray returns a copy of an array, but with each value as a Json
func (j *Json) JsonArray() ([]*Json, error) {
a, err := j.Array()
// CheckJsonArray returns a copy of an array, but with each value as a Json
func (j *Json) CheckJsonArray() ([]*Json, error) {
a, err := j.CheckArray()
if err != nil {
return nil, err
}
Expand All @@ -201,267 +201,267 @@ func (j *Json) JsonArray() ([]*Json, error) {
return ja, nil
}

// Map type asserts to `map`
func (j *Json) Map() (map[string]interface{}, error) {
// CheckMap type asserts to `map`
func (j *Json) CheckMap() (map[string]interface{}, error) {
if m, ok := (j.data).(map[string]interface{}); ok {
return m, nil
}
return nil, errors.New("type assertion to map[string]interface{} failed")
}

// Array type asserts to an `array`
func (j *Json) Array() ([]interface{}, error) {
// CheckArray type asserts to an `array`
func (j *Json) CheckArray() ([]interface{}, error) {
if a, ok := (j.data).([]interface{}); ok {
return a, nil
}
return nil, errors.New("type assertion to []interface{} failed")
}

// Bool type asserts to `bool`
func (j *Json) Bool() (bool, error) {
// CheckBool type asserts to `bool`
func (j *Json) CheckBool() (bool, error) {
if s, ok := (j.data).(bool); ok {
return s, nil
}
return false, errors.New("type assertion to bool failed")
}

// String type asserts to `string`
func (j *Json) String() (string, error) {
// CheckString type asserts to `string`
func (j *Json) CheckString() (string, error) {
if s, ok := (j.data).(string); ok {
return s, nil
}
return "", errors.New("type assertion to string failed")
}

// Bytes type asserts to `[]byte`
func (j *Json) Bytes() ([]byte, error) {
// CheckBytes type asserts to `[]byte`
func (j *Json) CheckBytes() ([]byte, error) {
if s, ok := (j.data).(string); ok {
return []byte(s), nil
}
return nil, errors.New("type assertion to []byte failed")
}

// MustJsonArray guarantees the return of a `[]interface{}` (with optional default)
func (j *Json) MustJsonArray(args ...[]*Json) []*Json {
// JsonArray guarantees the return of a `[]interface{}` (with optional default)
func (j *Json) JsonArray(args ...[]*Json) []*Json {
var def []*Json

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustJsonArray() received too many arguments %d", len(args))
log.Panicf("JsonArray() received too many arguments %d", len(args))
}

a, err := j.JsonArray()
a, err := j.CheckJsonArray()
if err == nil {
return a
}

return def
}

// MustJsonMap guarantees the return of a `map[string]interface{}` (with optional default)
func (j *Json) MustJsonMap(args ...map[string]*Json) map[string]*Json {
// JsonMap guarantees the return of a `map[string]interface{}` (with optional default)
func (j *Json) JsonMap(args ...map[string]*Json) map[string]*Json {
var def map[string]*Json

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustJsonMap() received too many arguments %d", len(args))
log.Panicf("JsonMap() received too many arguments %d", len(args))
}

a, err := j.JsonMap()
a, err := j.CheckJsonMap()
if err == nil {
return a
}

return def
}

// MustArray guarantees the return of a `[]interface{}` (with optional default)
// Array guarantees the return of a `[]interface{}` (with optional default)
//
// useful when you want to interate over array values in a succinct manner:
// for i, v := range js.Get("results").MustArray() {
// for i, v := range js.Get("results").Array() {
// fmt.Println(i, v)
// }
func (j *Json) MustArray(args ...[]interface{}) []interface{} {
func (j *Json) Array(args ...[]interface{}) []interface{} {
var def []interface{}

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustArray() received too many arguments %d", len(args))
log.Panicf("Array() received too many arguments %d", len(args))
}

a, err := j.Array()
a, err := j.CheckArray()
if err == nil {
return a
}

return def
}

// MustMap guarantees the return of a `map[string]interface{}` (with optional default)
// Map guarantees the return of a `map[string]interface{}` (with optional default)
//
// useful when you want to interate over map values in a succinct manner:
// for k, v := range js.Get("dictionary").MustMap() {
// for k, v := range js.Get("dictionary").Map() {
// fmt.Println(k, v)
// }
func (j *Json) MustMap(args ...map[string]interface{}) map[string]interface{} {
func (j *Json) Map(args ...map[string]interface{}) map[string]interface{} {
var def map[string]interface{}

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustMap() received too many arguments %d", len(args))
log.Panicf("Map() received too many arguments %d", len(args))
}

a, err := j.Map()
a, err := j.CheckMap()
if err == nil {
return a
}

return def
}

// MustString guarantees the return of a `string` (with optional default)
// String guarantees the return of a `string` (with optional default)
//
// useful when you explicitly want a `string` in a single value return context:
// myFunc(js.Get("param1").MustString(), js.Get("optional_param").MustString("my_default"))
func (j *Json) MustString(args ...string) string {
// myFunc(js.Get("param1").String(), js.Get("optional_param").String("my_default"))
func (j *Json) String(args ...string) string {
var def string

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustString() received too many arguments %d", len(args))
log.Panicf("String() received too many arguments %d", len(args))
}

s, err := j.String()
s, err := j.CheckString()
if err == nil {
return s
}

return def
}

// MustInt guarantees the return of an `int` (with optional default)
// Int guarantees the return of an `int` (with optional default)
//
// useful when you explicitly want an `int` in a single value return context:
// myFunc(js.Get("param1").MustInt(), js.Get("optional_param").MustInt(5150))
func (j *Json) MustInt(args ...int) int {
// myFunc(js.Get("param1").Int(), js.Get("optional_param").Int(5150))
func (j *Json) Int(args ...int) int {
var def int

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustInt() received too many arguments %d", len(args))
log.Panicf("Int() received too many arguments %d", len(args))
}

i, err := j.Int()
i, err := j.CheckInt()
if err == nil {
return i
}

return def
}

// MustFloat64 guarantees the return of a `float64` (with optional default)
// Float64 guarantees the return of a `float64` (with optional default)
//
// useful when you explicitly want a `float64` in a single value return context:
// myFunc(js.Get("param1").MustFloat64(), js.Get("optional_param").MustFloat64(5.150))
func (j *Json) MustFloat64(args ...float64) float64 {
// myFunc(js.Get("param1").Float64(), js.Get("optional_param").Float64(5.150))
func (j *Json) Float64(args ...float64) float64 {
var def float64

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustFloat64() received too many arguments %d", len(args))
log.Panicf("Float64() received too many arguments %d", len(args))
}

f, err := j.Float64()
f, err := j.CheckFloat64()
if err == nil {
return f
}

return def
}

// MustBool guarantees the return of a `bool` (with optional default)
// Bool guarantees the return of a `bool` (with optional default)
//
// useful when you explicitly want a `bool` in a single value return context:
// myFunc(js.Get("param1").MustBool(), js.Get("optional_param").MustBool(true))
func (j *Json) MustBool(args ...bool) bool {
// myFunc(js.Get("param1").Bool(), js.Get("optional_param").Bool(true))
func (j *Json) Bool(args ...bool) bool {
var def bool

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustBool() received too many arguments %d", len(args))
log.Panicf("Bool() received too many arguments %d", len(args))
}

b, err := j.Bool()
b, err := j.CheckBool()
if err == nil {
return b
}

return def
}

// MustInt64 guarantees the return of an `int64` (with optional default)
// Int64 guarantees the return of an `int64` (with optional default)
//
// useful when you explicitly want an `int64` in a single value return context:
// myFunc(js.Get("param1").MustInt64(), js.Get("optional_param").MustInt64(5150))
func (j *Json) MustInt64(args ...int64) int64 {
// myFunc(js.Get("param1").Int64(), js.Get("optional_param").Int64(5150))
func (j *Json) Int64(args ...int64) int64 {
var def int64

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustInt64() received too many arguments %d", len(args))
log.Panicf("Int64() received too many arguments %d", len(args))
}

i, err := j.Int64()
i, err := j.CheckInt64()
if err == nil {
return i
}

return def
}

// MustUInt64 guarantees the return of an `uint64` (with optional default)
// UInt64 guarantees the return of an `uint64` (with optional default)
//
// useful when you explicitly want an `uint64` in a single value return context:
// myFunc(js.Get("param1").MustUint64(), js.Get("optional_param").MustUint64(5150))
func (j *Json) MustUint64(args ...uint64) uint64 {
// myFunc(js.Get("param1").Uint64(), js.Get("optional_param").Uint64(5150))
func (j *Json) Uint64(args ...uint64) uint64 {
var def uint64

switch len(args) {
case 0:
case 1:
def = args[0]
default:
log.Panicf("MustUint64() received too many arguments %d", len(args))
log.Panicf("Uint64() received too many arguments %d", len(args))
}

i, err := j.Uint64()
i, err := j.CheckUint64()
if err == nil {
return i
}
Expand Down
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