Merge pull request #38 from shurcooL/add-decodeViaJSON-benchmark
Add decodeViaJSON, benchmark and example (as a test).
diff --git a/mapstructure_benchmark_test.go b/mapstructure_benchmark_test.go
index b50ac36..41d2a41 100644
--- a/mapstructure_benchmark_test.go
+++ b/mapstructure_benchmark_test.go
@@ -1,6 +1,7 @@
package mapstructure
import (
+ "encoding/json"
"testing"
)
@@ -27,6 +28,41 @@
}
}
+// decodeViaJSON takes the map data and passes it through encoding/json to convert it into the
+// given Go native structure pointed to by v. v must be a pointer to a struct.
+func decodeViaJSON(data interface{}, v interface{}) error {
+ // Perform the task by simply marshalling the input into JSON,
+ // then unmarshalling it into target native Go struct.
+ b, err := json.Marshal(data)
+ if err != nil {
+ return err
+ }
+ return json.Unmarshal(b, v)
+}
+
+func Benchmark_DecodeViaJSON(b *testing.B) {
+ type Person struct {
+ Name string
+ Age int
+ Emails []string
+ Extra map[string]string
+ }
+
+ input := map[string]interface{}{
+ "name": "Mitchell",
+ "age": 91,
+ "emails": []string{"one", "two", "three"},
+ "extra": map[string]string{
+ "twitter": "mitchellh",
+ },
+ }
+
+ var result Person
+ for i := 0; i < b.N; i++ {
+ decodeViaJSON(input, &result)
+ }
+}
+
func Benchmark_DecodeBasic(b *testing.B) {
input := map[string]interface{}{
"vstring": "foo",
diff --git a/mapstructure_examples_test.go b/mapstructure_examples_test.go
index f17c214..f42f50e 100644
--- a/mapstructure_examples_test.go
+++ b/mapstructure_examples_test.go
@@ -35,6 +35,37 @@
// mapstructure.Person{Name:"Mitchell", Age:91, Emails:[]string{"one", "two", "three"}, Extra:map[string]string{"twitter":"mitchellh"}}
}
+func ExampleDecodeViaJSON() {
+ type Person struct {
+ Name string
+ Age int
+ Emails []string
+ Extra map[string]string
+ }
+
+ // This input can come from anywhere, but typically comes from
+ // something like decoding JSON where we're not quite sure of the
+ // struct initially.
+ input := map[string]interface{}{
+ "name": "Mitchell",
+ "age": 91,
+ "emails": []string{"one", "two", "three"},
+ "extra": map[string]string{
+ "twitter": "mitchellh",
+ },
+ }
+
+ var result Person
+ err := decodeViaJSON(input, &result)
+ if err != nil {
+ panic(err)
+ }
+
+ fmt.Printf("%#v", result)
+ // Output:
+ // mapstructure.Person{Name:"Mitchell", Age:91, Emails:[]string{"one", "two", "three"}, Extra:map[string]string{"twitter":"mitchellh"}}
+}
+
func ExampleDecode_errors() {
type Person struct {
Name string
