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util.go
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/
util.go
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package peas
import (
"errors"
"github.com/procyon-projects/goo"
)
func CreateInstance(typ goo.Type, args []interface{}) (interface{}, error) {
if typ.IsFunction() {
fun := typ.ToFunctionType()
if fun.GetFunctionReturnTypeCount() != 1 {
return nil, errors.New("it only supports the construction functions with one return parameter")
}
results := fun.Call(args)
return results[0], nil
} else if typ.IsStruct() {
if len(args) > 0 {
return nil, errors.New("struct type does not support args")
}
return typ.ToStructType().NewInstance(), nil
}
return nil, errors.New("you can only pass Struct or Func types")
}
func getStringMapKeys(mapObj interface{}) []string {
if mapObj == nil {
return nil
}
mapType := goo.GetType(mapObj)
if !mapType.IsMap() {
panic("It is not an instance of map")
}
keyType := mapType.ToMapType().GetKeyType()
if keyType.GetName() != "string" {
panic("the key type of the given map is not string")
}
argMapKeys := mapType.GetGoValue().MapKeys()
mapKeys := make([]string, len(argMapKeys))
for i := 0; i < len(argMapKeys); i++ {
mapKeys[i] = argMapKeys[i].String()
}
return mapKeys
}