internal void Instantiate(ContainerService.Builder builder)
{
LifestyleAttribute lifestyle;
if (builder.Type.IsSimpleType())
{
builder.SetError("can't create simple type");
}
else if (builder.Type == typeof(IContainer))
{
builder.AddInstance(this, false, false);
}
else if (builder.Configuration.ImplementationAssigned)
{
builder.AddInstance(builder.Configuration.Implementation, builder.Configuration.ContainerOwnsInstance, true);
}
else if (builder.Configuration.Factory != null)
{
if (!builder.Context.AnalizeDependenciesOnly)
{
builder.CreateInstanceBy(CallTarget.F(builder.Configuration.Factory), builder.Configuration.ContainerOwnsInstance);
}
}
else if (builder.Type.IsValueType)
{
builder.SetError("can't create value type");
}
else if (builder.Type.IsGenericType && builder.Type.ContainsGenericParameters)
{
builder.SetError("can't create open generic");
}
else if (!builder.CreateNew && builder.Type.TryGetCustomAttribute(out lifestyle) &&
lifestyle.Lifestyle == Lifestyle.PerRequest)
{
const string messageFormat = "service [{0}] with PerRequest lifestyle can't be resolved, use Func<{0}> instead";
builder.SetError(string.Format(messageFormat, builder.Type.FormatName()));
}
else if (builder.Type.IsAbstract)
{
InstantiateInterface(builder);
}
else
{
InstantiateImplementation(builder);
}
}
private void InstantiateImplementation(ContainerService.Builder builder)
{
if (builder.DontUse())
{
builder.SetComment("DontUse");
return;
}
var result = FactoryCreator.TryCreate(builder) ?? LazyCreator.TryCreate(builder);
if (result != null)
{
builder.AddInstance(result, true, false);
return;
}
if (NestedFactoryCreator.TryCreate(builder))
{
return;
}
if (CtorFactoryCreator.TryCreate(builder))
{
return;
}
if (builder.Type.IsDelegate())
{
builder.SetError(string.Format("can't create delegate [{0}]", builder.Type.FormatName()));
return;
}
var constructor = builder.Type.GetConstructor();
if (!constructor.isOk)
{
builder.SetError(constructor.errorMessage);
return;
}
var formalParameters = constructor.value.GetParameters();
var actualArguments = new object[formalParameters.Length];
var hasServiceNameParameters = false;
for (var i = 0; i < formalParameters.Length; i++)
{
var formalParameter = formalParameters[i];
if (formalParameter.ParameterType == typeof(ServiceName))
{
hasServiceNameParameters = true;
continue;
}
var dependency = InstantiateDependency(formalParameter, builder).CastTo(formalParameter.ParameterType);
builder.AddDependency(dependency, false);
if (dependency.ContainerService != null)
{
builder.UnionUsedContracts(dependency.ContainerService);
}
if (builder.Status != ServiceStatus.Ok && !builder.Context.AnalizeDependenciesOnly)
{
return;
}
actualArguments[i] = dependency.Value;
}
foreach (var d in builder.Configuration.ImplicitDependencies)
{
var dependency = ResolveCore(ServiceName.Parse(d.Type, d.Contracts), false, null, builder.Context)
.AsDependency(containerContext, null, false);
dependency.Comment = "implicit";
builder.AddDependency(dependency, false);
if (dependency.ContainerService != null)
{
builder.UnionUsedContracts(dependency.ContainerService);
}
if (builder.Status != ServiceStatus.Ok)
{
return;
}
}
builder.EndResolveDependencies();
if (builder.Context.AnalizeDependenciesOnly)
{
return;
}
var dependenciesResolvedByArguments = builder.Arguments == null ? null : builder.Arguments.GetUsed();
List <string> unusedConfigurationKeys = null;
foreach (var k in builder.Configuration.GetUnusedDependencyKeys())
{
var resolvedByArguments = dependenciesResolvedByArguments != null &&
k.name != null &&
dependenciesResolvedByArguments.Contains(k.name);
if (resolvedByArguments)
{
continue;
}
if (unusedConfigurationKeys == null)
{
unusedConfigurationKeys = new List <string>();
}
unusedConfigurationKeys.Add(k.ToString());
}
if (unusedConfigurationKeys != null)
{
builder.SetError(string.Format("unused dependency configurations [{0}]", unusedConfigurationKeys.JoinStrings(",")));
return;
}
if (hasServiceNameParameters)
{
for (var i = 0; i < formalParameters.Length; i++)
{
if (formalParameters[i].ParameterType == typeof(ServiceName))
{
actualArguments[i] = builder.GetFinalName();
}
}
}
if (builder.CreateNew || builder.DeclaredContracts.Length == builder.FinalUsedContracts.Length)
{
builder.CreateInstanceBy(CallTarget.M(constructor.value, null, actualArguments), true);
if (builder.CreateNew && builder.Arguments == null)
{
var compiledConstructor = constructor.value.Compile();
factoryCache.TryAdd(builder.GetFinalName(), () =>
{
var instance = compiledConstructor(null, actualArguments);
var component = instance as IInitializable;
if (component != null)
{
component.Initialize();
}
return(instance);
});
}
return;
}
var serviceForUsedContractsId = instanceCache.GetOrAdd(builder.GetFinalName(), createId);
var acquireResult = serviceForUsedContractsId.AcquireInstantiateLock();
if (acquireResult.acquired)
{
builder.CreateInstanceBy(CallTarget.M(constructor.value, null, actualArguments), true);
serviceForUsedContractsId.ReleaseInstantiateLock(builder.Context.AnalizeDependenciesOnly
? null
: builder.GetService());
}
else
{
builder.Reuse(acquireResult.alreadyConstructedService);
}
}
public static bool TryCreate(ContainerService.Builder builder)
{
if (!builder.Type.IsDelegate() || builder.Type.FullName.StartsWith("System.Func`"))
{
return(false);
}
var invokeMethod = builder.Type.GetMethod("Invoke");
if (!builder.Type.IsNestedPublic)
{
builder.SetError(string.Format("can't create delegate [{0}]. must be nested public", builder.Type.FormatName()));
return(true);
}
if (invokeMethod.ReturnType != builder.Type.DeclaringType)
{
builder.SetError(string.Format("can't create delegate [{0}]. return type must match declaring", builder.Type.FormatName()));
return(true);
}
const BindingFlags ctorBindingFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
var constructors = builder.Type.DeclaringType.GetConstructors(ctorBindingFlags)
.Where(x => Match(invokeMethod, x))
.ToArray();
if (constructors.Length == 0)
{
builder.SetError("can't find matching ctor");
return(true);
}
if (constructors.Length > 1)
{
builder.SetError("more than one matched ctors found");
return(true);
}
var delegateParameters = invokeMethod.GetParameters();
var delegateParameterNameToIndexMap = new Dictionary <string, int>();
for (var i = 0; i < delegateParameters.Length; i++)
{
delegateParameterNameToIndexMap[delegateParameters[i].Name] = i;
}
var dynamicMethodParameterTypes = new Type[delegateParameters.Length + 1];
dynamicMethodParameterTypes[0] = typeof(object[]);
for (var i = 1; i < dynamicMethodParameterTypes.Length; i++)
{
dynamicMethodParameterTypes[i] = delegateParameters[i - 1].ParameterType;
}
var dynamicMethod = new DynamicMethod("", invokeMethod.ReturnType,
dynamicMethodParameterTypes, typeof(ReflectionHelpers), true);
var il = dynamicMethod.GetILGenerator();
var ctorParameters = constructors[0].GetParameters();
var serviceTypeToIndex = new Dictionary <Type, int>();
var services = new List <object>();
foreach (var p in ctorParameters)
{
int delegateParameterIndex;
if (delegateParameterNameToIndexMap.TryGetValue(p.Name, out delegateParameterIndex))
{
var delegateParameterType = delegateParameters[delegateParameterIndex].ParameterType;
if (!p.ParameterType.IsAssignableFrom(delegateParameterType))
{
const string messageFormat = "type mismatch for [{0}], delegate type [{1}], ctor type [{2}]";
builder.SetError(string.Format(messageFormat,
p.Name, delegateParameterType.FormatName(), p.ParameterType.FormatName()));
return(true);
}
il.EmitLdArg(delegateParameterIndex + 1);
delegateParameterNameToIndexMap.Remove(p.Name);
}
else
{
int serviceIndex;
if (!serviceTypeToIndex.TryGetValue(p.ParameterType, out serviceIndex))
{
object value;
if (p.ParameterType == typeof(ServiceName))
{
value = null;
}
else
{
var dependency = builder.Context.Container.InstantiateDependency(p, builder).CastTo(p.ParameterType);
builder.AddDependency(dependency, false);
if (dependency.ContainerService != null)
{
builder.UnionUsedContracts(dependency.ContainerService);
}
if (builder.Status != ServiceStatus.Ok)
{
return(true);
}
value = dependency.Value;
}
serviceIndex = serviceTypeToIndex.Count;
serviceTypeToIndex.Add(p.ParameterType, serviceIndex);
services.Add(value);
}
il.Emit(OpCodes.Ldarg_0);
il.EmitLdInt32(serviceIndex);
il.Emit(OpCodes.Ldelem_Ref);
il.Emit(p.ParameterType.IsValueType ? OpCodes.Unbox_Any : OpCodes.Castclass, p.ParameterType);
}
}
if (delegateParameterNameToIndexMap.Count > 0)
{
builder.SetError(string.Format("delegate has not used parameters [{0}]",
delegateParameterNameToIndexMap.Keys.JoinStrings(",")));
return(true);
}
builder.EndResolveDependencies();
int serviceNameIndex;
if (serviceTypeToIndex.TryGetValue(typeof(ServiceName), out serviceNameIndex))
{
services[serviceNameIndex] = new ServiceName(builder.Type.DeclaringType, builder.FinalUsedContracts);
}
il.Emit(OpCodes.Newobj, constructors[0]);
il.Emit(OpCodes.Ret);
var context = serviceTypeToIndex.Count == 0 ? null : services.ToArray();
builder.AddInstance(dynamicMethod.CreateDelegate(builder.Type, context), true, false);
return(true);
}