runtime_instantiator.go

/*
 * This file is part of Golaxy Distributed Service Development Framework.
 *
 * Golaxy Distributed Service Development Framework is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * Golaxy Distributed Service Development Framework is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Golaxy Distributed Service Development Framework. If not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright (c) 2024 pangdogs.
 */

package framework

import (
	"reflect"

	"git.golaxy.org/core"
	"git.golaxy.org/core/utils/exception"
)

// IRuntimeInstantiator 运行时实例化接口
type IRuntimeInstantiator interface {
	Instantiate() IRuntime
}

func newRuntimeInstantiator(rtInst any) *_RuntimeInstantiator {
	if rtInst == nil {
		exception.Panicf("%w: %w: rtInst is nil", ErrFramework, core.ErrArgs)
	}

	rtInstRT, ok := rtInst.(reflect.Type)
	if !ok {
		rtInstRT = reflect.ValueOf(rtInst).Type()
	}

	for rtInstRT.Kind() == reflect.Pointer {
		rtInstRT = rtInstRT.Elem()
	}

	if rtInstRT.PkgPath() == "" || rtInstRT.Name() == "" || !reflect.PointerTo(rtInstRT).Implements(reflect.TypeFor[IRuntime]()) {
		exception.Panicf("%w: unsupported type", ErrFramework)
	}

	return &_RuntimeInstantiator{
		instanceRT: rtInstRT,
	}
}

type _RuntimeInstantiator struct {
	RuntimeAssembler
	instanceRT reflect.Type
}

func (r *_RuntimeInstantiator) Instantiate() IRuntime {
	if r.instanceRT == nil {
		exception.Panicf("%w: instanceRT is nil", ErrFramework)
	}
	return reflect.New(r.instanceRT).Interface().(IRuntime)
}