/
reflections.go
91 lines (77 loc) · 2.08 KB
/
reflections.go
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package jsonrpc
import (
"reflect"
"unicode"
"utf8"
"json"
)
// Fuck yeah, UTF8 compatible!
func isPublicMethod(method reflect.Method) bool {
return unicode.IsUpper(utf8.NewString(method.Name).At(0))
}
func (this *JsonRPC) cacheMethods() {
this.methods = make(map[string]reflect.Method)
num := this.object.Type().NumMethod()
for i := 0; i < num; i++ {
method := this.object.Type().Method(i)
if isPublicMethod(method) {
this.methods[method.Name] = method
}
}
}
func createUnmarshallingInterface(pointerType reflect.Type) interface{} {
if pointerType.Kind() != reflect.Ptr {
panic("Parameters have to be pointers")
}
valueType := pointerType.Elem()
valuePointer := reflect.New(valueType)
return valuePointer.Interface()
}
func createParameterArray(method reflect.Method) []interface{} {
numIn := method.Type.NumIn()
r := make([]interface{}, numIn-1)
// First parameter is receiver, no unmarshalling
// necessary there, hence i := 1
for i := 1; i < method.Type.NumIn(); i++ {
intype := method.Type.In(i)
r[i-1] = createUnmarshallingInterface(intype)
}
return r
}
func typeParams(method reflect.Method, raw_params []interface{}) []reflect.Value {
params := createParameterArray(method)
data, e := json.Marshal(raw_params)
if e != nil {
panic(e)
}
e = json.Unmarshal(data, ¶ms)
if e != nil {
panic(e)
}
result := make([]reflect.Value, len(params))
for i := range params {
result[i] = reflect.ValueOf(params[i])
}
return result
}
func executeCall(rcv reflect.Value, method reflect.Method, raw_params []interface{}) []interface{} {
params := []reflect.Value{rcv}
params = append(params, typeParams(method, raw_params)...)
reflected_results := method.Func.Call(params)
result := value2Interface(reflected_results)
return result
}
func interface2Value(in []interface{}) []reflect.Value {
out := make([]reflect.Value, 0)
for _, i := range in {
out = append(out, reflect.ValueOf(i))
}
return out
}
func value2Interface(in []reflect.Value) []interface{} {
out := make([]interface{}, 0)
for _, i := range in {
out = append(out, i.Interface())
}
return out
}