/// <summary>
/// 动态设置指定名称的成员的值。
/// </summary>
/// <param name="name">成员的名称，可以是一个属性或字段。</param>
/// <param name="value">成员的值。</param>
public virtual void Set(string name, object value)
{
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException(nameof(name));
}
var memberInfo = Type.GetMember(name, AllBindingFalgs).FirstOrDefault();
DynamicMemberSetter d = null;
if (memberInfo != null)
{
if (memberInfo.MemberType == MemberTypes.Property)
{
d = DynamicFactory.CreatePropertySetter(memberInfo as PropertyInfo);
}
else if (memberInfo.MemberType == MemberTypes.Field)
{
d = DynamicFactory.CreateFieldSetter(memberInfo as FieldInfo);
}
}
if (d == null)
{
throw new MissingMemberException(Type.FullName, name);
}
d(Instance, value);
}
/// <summary>
/// 动态调用指定名称的泛型方法。
/// </summary>
/// <param name="genericTypes">泛型</param>
/// <param name="name">方法的名称。</param>
/// <param name="args">方法的参数值。</param>
/// <returns>方法执行的结果，如果方法是一个 void 签名则返回 null 值。</returns>
public virtual object Call(Type[] genericTypes, string name, params object[] args)
{
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException(nameof(name));
}
if (genericTypes == null)
{
throw new ArgumentNullException(nameof(genericTypes));
}
if (genericTypes.Length == 0)
{
return(Call(name, args));
}
var key = name + genericTypes.Join(t => t.Name + t.MetadataToken, ", ", "[", "]");
var methodInfo = Type.GetMethod(name, AllBindingFalgs);
if (methodInfo == null)
{
throw new MissingMethodException(Type.FullName, key);
}
if (!methodInfo.IsGenericMethodDefinition)
{
throw new ArgumentException("仅支持尚未构造泛型参数的方法。", name);
}
var d = DynamicFactory.CreateMethodInvoker(methodInfo.MakeGenericMethod(genericTypes));
return(d(Instance, args));
}
/// <summary>
/// 指定预期和实际服务类型，创建一个实例构造器的回调函数。
/// </summary>
/// <param name="expectType">预期服务类型。</param>
/// <param name="actualType">实际服务类型。</param>
/// <returns>实例构造器委托。</returns>
internal InstanceCreatorCallback CreateCallback(Type expectType, Type actualType)
{
this.TestActualType(actualType);
var ctors = actualType.GetConstructors(Aoite.Reflection.Flags.InstanceAnyVisibility);
if (ctors.Length > 1)
{
ctors = ctors.OrderBy(ctor => ctor.GetAttribute <OrderMappingAttribute>()?.Order ?? 0).ToArray();
}
var hasExpectedType = expectType != actualType;
List <Exception> exceptions = new List <Exception>();
foreach (var ctor in ctors)
{
var ps = ctor.GetParameters();
if (ps.Length == 0)
{
return(lmvs => Activator.CreateInstance(actualType, true));
}
var callSites = new ICallSite[ps.Length];
for (int i = 0, lastMappingIndex = 0; i < ps.Length; i++)
{
var p = ps[i];
var pType = p.ParameterType;
var isSimpleType = pType.IsSimpleType();
var pName = p.Name;
ICallSite callSite = null;
if (p.IsDefined(LastMappingAttribute.Type, true) ||
(pType.IsDefined(LastMappingAttribute.Type, true) && !p.IsDefined(IgnoreAttribute.Type, true)))
{
callSite = new LastMappingCallSite(actualType, p, lastMappingIndex++);
}
else if (!this.FindParameterCallSite(expectType, actualType, pType, pName, hasExpectedType, isSimpleType, out callSite))
{
exceptions.Add(new ArgumentException($"实际服务类型{actualType.FullName}()：构造函数的参数“{pName}”尚未配置映射，并且自动分析失败。", pName));
callSites = null;
break;
}
callSites[i] = callSite;
}
if (callSites != null)
{
var ctorHandler = DynamicFactory.CreateConstructorHandler(ctor);
return(lmps => ctorHandler(callSites.Each(cs => cs.Invoke(lmps))));
}
}
throw new AggregateException(actualType.FullName + "没有在映射列表中找到匹配的构造函数。错误内容可以详见 System.Exception.Data 字典。", exceptions);
}
private static Tuple <DynamicMethodInvoker, DynamicMethodInvoker> GetInvoker <TResult>(ICommand <TResult> command)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
return(Invokers.GetOrAdd(command.GetType(), type =>
{
var flags = Reflection.BindingFlags.Static | Reflection.BindingFlags.Public;
var resultType = typeof(TResult);
return Tuple.Create(DynamicFactory.CreateMethodInvoker(CommandBusWapperType.MakeGenericType(type, resultType).GetMethod("Execute", flags))
, DynamicFactory.CreateMethodInvoker(CommandBusWapperType.MakeGenericType(type, resultType).GetMethod("ExecuteAsync", flags)));
}
));
}
/// <summary>
/// 动态调用指定名称的方法。
/// </summary>
/// <param name="name">方法的名称。</param>
/// <param name="args">方法的参数值。</param>
/// <returns>方法执行的结果，如果方法是一个 void 签名则返回 null 值。</returns>
public virtual object Call(string name, params object[] args)
{
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException(nameof(name));
}
var methodInfo = Type.GetMethod(name, AllBindingFalgs);
if (methodInfo == null)
{
throw new MissingMethodException(Type.FullName, name);
}
var d = DynamicFactory.CreateMethodInvoker(methodInfo);
return(d(Instance, args));
}
/// <summary>
/// 将dynamic类型的对象传递到view页面
/// </summary>
/// <param name="entity"></param>
/// <returns></returns>
public static object ToDynamic(this object entity)
{
return(DynamicFactory.ToDynamic(entity));
}
