/// <summary>
/// 递归查找父节点
/// </summary>
/// <param name="dependencyInjectionTreeModel"></param>
/// <param name="type"></param>
/// <returns></returns>
private static DependencyInjectionTreeModel GetDependencyInjectionTree(DependencyInjectionTreeModel dependencyInjectionTreeModel, Type type)
{
if (dependencyInjectionTreeModel == null)
{
return(null);
}
if (dependencyInjectionTreeModel.DependencyInjection.Type == type)
{
return(dependencyInjectionTreeModel);
}
if (dependencyInjectionTreeModel.ParentDependencyInjectionTree == null)
{
return(null);
}
return(GetDependencyInjectionTree(dependencyInjectionTreeModel.ParentDependencyInjectionTree, type));
}
/// <summary>
/// 分析依赖树
/// </summary>
/// <param name="dependencyInjectionTreeModel"></param>
private static void AnalysisDependencyInjectionTree(DependencyInjectionTreeModel dependencyInjectionTreeModel)
{
foreach (var propertyInfo in dependencyInjectionTreeModel.DependencyInjection.Type.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
{
//判断当前属性是否具有DependencyInjectionAttribute特性
var customeAttribute = propertyInfo.GetCustomAttribute(typeof(AutowiredAttribute), false);
if (customeAttribute == null)
{
continue;
}
//等待注入的类型
var injectionType = ((AutowiredAttribute)customeAttribute).RealType ?? propertyInfo.PropertyType;
//自己依赖自己
if (injectionType == dependencyInjectionTreeModel.DependencyInjection.Type)
{
throw new UnableResolveDependencyException($"Unable to resolve dependency {injectionType.FullName}.");
}
//从父树查找是否已经有依赖
var parentInjectionTreeModel = GetDependencyInjectionTree(dependencyInjectionTreeModel.ParentDependencyInjectionTree, injectionType);
if (parentInjectionTreeModel != null)
{
//查找父树的依赖是否是Transient模式,如是则此循环依赖无法支持
if (parentInjectionTreeModel.DependencyInjection.DependencyInjectionMode == DependencyInjectionModeEnum.Transient)
{
throw new UnableResolveDependencyException($"Unable to resolve dependency {injectionType.FullName}. {parentInjectionTreeModel.DependencyInjection.Type.FullName} DependencyInjectionMode should not be Transient when using circular dependencies");
}
continue;
}
//查看是否加入到了容器
var dependencyInjection = DependencyInjections.FirstOrDefault(item => item.Type == injectionType);
if (dependencyInjection == null)
{
//虽然未找到实例,但是可能通过IServiceCollection加入到了容器
continue;
}
var nextDependencyInjectionTreeModel = new DependencyInjectionTreeModel {
DependencyInjection = dependencyInjection,
ParentDependencyInjectionTree = dependencyInjectionTreeModel
};
AnalysisDependencyInjectionTree(nextDependencyInjectionTreeModel);
}
foreach (var fieldInfo in dependencyInjectionTreeModel.DependencyInjection.Type.GetFields(BindingFlags.Public | BindingFlags.NonPublic))
{
//判断当前属性是否具有DependencyInjectionAttribute特性
var customeAttribute = fieldInfo.GetCustomAttribute(typeof(AutowiredAttribute), false);
if (customeAttribute == null)
{
continue;
}
//等待注入的类型
var injectionType = ((AutowiredAttribute)customeAttribute).RealType ?? fieldInfo.FieldType;
//自己依赖自己
if (injectionType == dependencyInjectionTreeModel.DependencyInjection.Type)
{
throw new UnableResolveDependencyException($"Unable to resolve dependency {injectionType.FullName}.");
}
//从父树查找是否已经有依赖
var parentInjectionTreeModel = GetDependencyInjectionTree(dependencyInjectionTreeModel.ParentDependencyInjectionTree, injectionType);
if (parentInjectionTreeModel != null)
{
//查找父树的依赖是否是Transient模式,如是则此循环依赖无法支持
if (parentInjectionTreeModel.DependencyInjection.DependencyInjectionMode == DependencyInjectionModeEnum.Transient)
{
throw new UnableResolveDependencyException($"Unable to resolve dependency {injectionType.FullName}. {parentInjectionTreeModel.DependencyInjection.Type.FullName} DependencyInjectionMode should not be Transient when using circular dependencies");
}
continue;
}
//查看是否加入到了容器
var dependencyInjection = DependencyInjections.FirstOrDefault(item => item.Type == injectionType);
if (dependencyInjection == null)
{
//虽然未找到实例,但是可能通过IServiceCollection加入到了容器
continue;
}
var nextDependencyInjectionTreeModel = new DependencyInjectionTreeModel {
DependencyInjection = dependencyInjection,
ParentDependencyInjectionTree = dependencyInjectionTreeModel
};
AnalysisDependencyInjectionTree(nextDependencyInjectionTreeModel);
}
}
