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pluggable: add Registry.TryInstantiate #270

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Merged
merged 1 commit into from
Nov 10, 2025
Merged

pluggable: add Registry.TryInstantiate #270

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17 changes: 13 additions & 4 deletions pluggable/pluggable.go
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,11 @@
// }
package pluggable

import "fmt"
import (
"fmt"

. "github.com/majewsky/gg/option"
)

// Plugin is the base interface for plugins that type Registry can instantiate.
type Plugin interface {
Expand Down Expand Up @@ -74,10 +78,15 @@ func (r *Registry[T]) Add(factory func() T) {
// Since T is usually an application-specific interface type, this means that
// nil will be returned.
func (r *Registry[T]) Instantiate(pluginTypeID string) T {
var zero T
return r.TryInstantiate(pluginTypeID).UnwrapOr(zero)
}

// TryInstantiate is like Instantiate, but returns None instead of nil for unknown plugins.
func (r *Registry[T]) TryInstantiate(pluginTypeID string) Option[T] {
factory, exists := r.factories[pluginTypeID]
if exists {
return factory()
return Some(factory())
}
var zero T
return zero
return None[T]()
}
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