internal object CreateInstance(IComponentContext context)
{
ConstructorInfo constructorInfo = null;
var impType = context.Component.Implementation;
if (impType.IsAbstract || impType.IsInterface)
{
throw new ActivatorException(
string.Format(Mini_Resources.TypeAbstract,
impType.FullName,
context.Component.Contracts[0].FullName));
}
if (impType.IsOpenGenericType())
{
impType = impType.MakeCloseGenericType(context.GenericParameters);
}
if (context.NamedArgs != null && context.NamedArgs.Count > 0)
{
constructorInfo = impType.FindEligibleConstructor(context.NamedArgs);
if (impType.IsValueType)
{
return(Activator.CreateInstance(impType));
}
context.Instance = constructorInfo.FastInvoke(context.NamedArgs.Values.ToArray());
}
else if (context.Args != null && context.Args.Length > 0)
{
constructorInfo = impType.FindEligibleConstructor(context.Args);
if (impType.IsValueType)
{
return(Activator.CreateInstance(impType));
}
context.Instance = constructorInfo.FastInvoke(context.Args);
}
else
{
const BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.Public;
var ctors = context.Component.ExtendedProperties[impType.FullName + ":ctorInjections"] as ConstructorInjection[];
if (ctors != null && ctors.Length > 0)
{
var validConstructorBinding = ctors.FirstOrDefault(p => p.IsMatch);
if (validConstructorBinding == null)
{
throw new ActivatorException(
string.Format(Mini_Resources.NoConstructorsAvailable, impType, bindingFlags));
}
validConstructorBinding.Inject(context);
}
else
{
if (impType.IsValueType)
{
return(Activator.CreateInstance(impType));
}
throw new ActivatorException(
string.Format(Mini_Resources.NoConstructorsAvailable, impType, bindingFlags));
}
}
return(context.Instance);
}
/// <summary>通过类的构造器信息创建对象实例</summary>
/// <typeparam name="T">返回对象类型</typeparam>
/// <param name="constructorInfo">构造器信息</param>
/// <param name="parameters">参数</param>
/// <returns>新对象实例</returns>
public static T FastInvoke <T>(this ConstructorInfo constructorInfo, params object[] parameters)
{
return((T)constructorInfo.FastInvoke(parameters));
}
static object ConstructorInvoke(ConstructorInfo ctor, object[] parameterValues)
{
return(ctor.FastInvoke(parameterValues));
}
