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v2fly/common/type.go

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package common
import (
"context"
"reflect"
)
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// ConfigCreator is a function to create an object by a config.
type ConfigCreator func(ctx context.Context, config interface{}) (interface{}, error)
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var (
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typeCreatorRegistry = make(map[reflect.Type]ConfigCreator)
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)
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// RegisterConfig registers a global config creator. The config can be nil but must have a type.
func RegisterConfig(config interface{}, configCreator ConfigCreator) error {
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configType := reflect.TypeOf(config)
if _, found := typeCreatorRegistry[configType]; found {
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return newError("Common: " + configType.Name() + " is already registered.")
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}
typeCreatorRegistry[configType] = configCreator
return nil
}
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// CreateObject creates an object by its config. The config type must be registered through RegisterConfig().
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func CreateObject(ctx context.Context, config interface{}) (interface{}, error) {
configType := reflect.TypeOf(config)
creator, found := typeCreatorRegistry[configType]
if !found {
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return nil, newError("Common: " + configType.String() + " is not registered.")
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}
return creator(ctx, config)
}