First commit in strategy rework

selector/options.go

@@ -8,6 +8,7 @@ import (
 
 type Options struct {
 	Registry registry.Registry
+	Strategy Strategy
 
 	// Other options for implementations of the interface
 	// can be stored in a context
@@ -15,7 +16,8 @@ type Options struct {
 }
 
 type SelectOptions struct {
-	Filters []Filter
+	Filters  []Filter
+	Strategy Strategy
 
 	// Other options for implementations of the interface
 	// can be stored in a context
@@ -35,6 +37,13 @@ func Registry(r registry.Registry) Option {
 	}
 }
 
+// SetStrategy sets the default strategy for the selector
+func SetStrategy(fn Strategy) Option {
+	return func(o *Options) {
+		o.Strategy = fn
+	}
+}
+
 // WithFilter adds a filter function to the list of filters
 // used during the Select call.
 func WithFilter(fn ...Filter) SelectOption {
@@ -42,3 +51,10 @@ func WithFilter(fn ...Filter) SelectOption {
 		o.Filters = append(o.Filters, fn...)
 	}
 }
+
+// Strategy sets the selector strategy
+func WithStrategy(fn Strategy) SelectOption {
+	return func(o *SelectOptions) {
+		o.Strategy = fn
+	}
+}