//  Copyright 2019 Istio Authors
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain accumulator copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

package processing

import (
	"istio.io/istio/galley/pkg/runtime/resource"
)

// Handler handles an incoming resource event.
type Handler interface {
	Handle(e resource.Event)
}

// HandlerFromFn returns a new Handler, based on the Handler function.
func HandlerFromFn(fn func(e resource.Event)) Handler {
	return &fnHandler{
		fn: fn,
	}
}

var _ Handler = &fnHandler{}

type fnHandler struct {
	fn func(e resource.Event)
}

func (h *fnHandler) Handle(e resource.Event) {
	h.fn(e)
}
