private void ApplySelectors(HashSet <ImplementationType> implementations, ContainerService.Builder builder)
{
if (builder.Configuration != ServiceConfiguration.empty)
{
return;
}
if (implementationSelectors.Count == 0)
{
return;
}
var selectorDecisions = new List <ImplementationSelectorDecision>();
var typesArray = implementations.Select(x => x.type).ToArray();
foreach (var s in implementationSelectors)
{
s(builder.Type, typesArray, selectorDecisions);
}
foreach (var decision in selectorDecisions)
{
var item = new ImplementationType
{
type = decision.target,
comment = decision.comment,
accepted = decision.action == ImplementationSelectorDecision.Action.Include
};
implementations.Replace(item);
}
}
public static object TryCreate(ContainerService.Builder builder)
{
if (!builder.Type.IsGenericType)
{
return(null);
}
if (builder.Type.GetGenericTypeDefinition() != typeof(Lazy <>))
{
return(null);
}
var resultType = builder.Type.GetGenericArguments()[0];
if (builder.Context.Contracts.Count() > 0)
{
var oldValue = builder.Context.AnalizeDependenciesOnly;
builder.Context.AnalizeDependenciesOnly = true;
var containerService = builder.Context.Container.ResolveCore(new ServiceName(resultType), true, null,
builder.Context);
builder.Context.AnalizeDependenciesOnly = oldValue;
builder.UnionUsedContracts(containerService);
}
var lazyFactoryCtor = typeof(LazyFactory <>).MakeGenericType(resultType).GetConstructors().Single();
var lazyFactory = (ILazyFactory)lazyFactoryCtor.Compile()(null, new object[] { builder.Context.Container });
return(lazyFactory.CreateLazy());
}
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);
}
}
public static object TryCreate(ContainerService.Builder builder)
{
var funcType = builder.Type;
if (!funcType.IsGenericType || !funcType.IsDelegate())
{
return(null);
}
Type resultType;
var signature = FindSignature(funcType, out resultType);
if (signature == null)
{
return(null);
}
var factory = CreateFactory(builder, resultType);
var caster = casters.GetOrAdd(new SignatureDelegateKey(resultType, signature), createCaster);
var typedCaster = (Func <Func <Type, object, object>, object>)caster;
return(typedCaster(factory));
}
public static bool TryCreate(ContainerService.Builder builder)
{
var factoryType = builder.Type.GetNestedType("Factory");
if (factoryType == null)
{
return(false);
}
var method = factoryType.GetMethod("Create", Type.EmptyTypes);
if (method == null)
{
return(false);
}
var factory = builder.Context.Container.Resolve(method.DeclaringType, InternalHelpers.emptyStrings, false);
if (factory.IsOk())
{
builder.CreateInstanceBy(CallTarget.M(method, factory.Single(), new object[0]), true);
}
return(true);
}
private static Func <Type, object, object> CreateFactory(ContainerService.Builder builder, Type resultType)
{
var container = builder.Context.Container;
if (builder.Context.Contracts.Count() > 0)
{
var oldValue = builder.Context.AnalizeDependenciesOnly;
builder.Context.AnalizeDependenciesOnly = true;
var containerService = builder.Context.Container.ResolveCore(new ServiceName(resultType), true,
null, builder.Context);
builder.Context.AnalizeDependenciesOnly = oldValue;
builder.UnionUsedContracts(containerService);
}
builder.EndResolveDependencies();
var factoryContractsArray = builder.FinalUsedContracts;
return((type, arguments) =>
{
var name = ServiceName.Parse(type.UnwrapEnumerable(), factoryContractsArray);
return container.Create(name, name.Type != type, arguments);
});
}
public ContainerService Instantiate(Type type, bool crearteNew, IObjectAccessor arguments)
{
var builder = new ContainerService.Builder(type, this, crearteNew, arguments);
if (builder.Status != ServiceStatus.Ok)
return builder.Build();
var declaredName = builder.GetDeclaredName();
if (!constructingServices.Add(declaredName))
{
var previous = GetTopBuilder();
if (previous == null)
throw new InvalidOperationException(string.Format("assertion failure, service [{0}]", declaredName));
var message = string.Format("cyclic dependency {0}{1} -> {0}",
type.FormatName(), previous.Type == type ? "" : " ...-> " + previous.Type.FormatName());
var cycleBuilder = new ContainerService.Builder(type, this, false, null);
cycleBuilder.SetError(message);
return cycleBuilder.Build();
}
stack.Add(builder);
var expandResult = TryExpandUnions(Container.Configuration);
if (expandResult != null)
{
var poppedContracts = Contracts.PopMany(expandResult.Length);
foreach (var c in expandResult.CartesianProduct())
{
var childService = Resolve(new ServiceName(builder.Type, c));
builder.LinkTo(Container.containerContext, childService, null);
if (builder.Status.IsBad())
break;
}
Contracts.AddRange(poppedContracts);
}
else
Container.Instantiate(builder);
stack.RemoveLast();
constructingServices.Remove(declaredName);
return builder.Build();
}
internal ServiceDependency InstantiateDependency(ParameterInfo formalParameter, ContainerService.Builder builder)
{
ValueWithType actualArgument;
if (builder.Arguments != null && builder.Arguments.TryGet(formalParameter.Name, out actualArgument))
{
return(containerContext.Constant(formalParameter, actualArgument.value));
}
var parameters = builder.Configuration.ParametersSource;
object actualParameter;
if (parameters != null && parameters.TryGet(formalParameter.Name, formalParameter.ParameterType, out actualParameter))
{
return(containerContext.Constant(formalParameter, actualParameter));
}
var dependencyConfiguration = builder.Configuration.GetOrNull(formalParameter);
Type implementationType = null;
if (dependencyConfiguration != null)
{
if (dependencyConfiguration.ValueAssigned)
{
return(containerContext.Constant(formalParameter, dependencyConfiguration.Value));
}
if (dependencyConfiguration.Factory != null)
{
var dependencyBuilder = new ContainerService.Builder(new ServiceName(formalParameter.ParameterType))
{
Context = builder.Context,
DependencyName = formalParameter.Name
};
builder.Context.Stack.Add(dependencyBuilder);
dependencyBuilder.CreateInstanceBy(CallTarget.F(dependencyConfiguration.Factory), true);
builder.Context.Stack.RemoveLast();
return(dependencyBuilder.GetService().AsDependency(containerContext, formalParameter.Name, false));
}
implementationType = dependencyConfiguration.ImplementationType;
}
implementationType = implementationType ?? formalParameter.ParameterType;
FromResourceAttribute resourceAttribute;
if (implementationType == typeof(Stream) && formalParameter.TryGetCustomAttribute(out resourceAttribute))
{
var resourceStream = builder.Type.Assembly.GetManifestResourceStream(builder.Type, resourceAttribute.Name);
if (resourceStream == null)
{
return(containerContext.Error(null, formalParameter.Name,
"can't find resource [{0}] in namespace of [{1}], assembly [{2}]",
resourceAttribute.Name, builder.Type, builder.Type.Assembly.GetName().Name));
}
return(containerContext.Resource(formalParameter, resourceAttribute.Name, resourceStream));
}
var dependencyName = ServiceName.Parse(implementationType.UnwrapEnumerable(),
InternalHelpers.ParseContracts(formalParameter));
if (dependencyName.Type.IsSimpleType())
{
if (!formalParameter.HasDefaultValue)
{
return(containerContext.Error(null, formalParameter.Name,
"parameter [{0}] of service [{1}] is not configured",
formalParameter.Name, builder.Type.FormatName()));
}
return(containerContext.Constant(formalParameter, formalParameter.DefaultValue));
}
var resultService = ResolveCore(dependencyName, false, null, builder.Context);
if (resultService.Status.IsBad())
{
return(containerContext.ServiceError(resultService));
}
var isEnumerable = dependencyName.Type != implementationType;
if (isEnumerable)
{
return(containerContext.Service(resultService, resultService.GetAllValues()));
}
if (resultService.Status == ServiceStatus.NotResolved)
{
if (formalParameter.HasDefaultValue)
{
return(containerContext.Service(resultService, formalParameter.DefaultValue));
}
if (formalParameter.IsDefined <OptionalAttribute>() || formalParameter.IsDefined("CanBeNullAttribute"))
{
return(containerContext.Service(resultService, null));
}
return(containerContext.NotResolved(resultService));
}
return(resultService.AsDependency(containerContext, null, false));
}
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);
}
}
private HashSet <ImplementationType> GetImplementationTypes(ContainerService.Builder builder)
{
var result = new HashSet <ImplementationType>();
var candidates = builder.Configuration.ImplementationTypes ??
containerContext.typesList.InheritorsOf(builder.Type.GetDefinition());
var implementationTypesAreExplicitlyConfigured = builder.Configuration.ImplementationTypes != null;
foreach (var implType in candidates)
{
if (!implementationTypesAreExplicitlyConfigured)
{
var configuration = GetConfiguration(implType, builder.Context);
if (configuration.IgnoredImplementation || implType.IsDefined("IgnoredImplementationAttribute"))
{
result.Add(new ImplementationType
{
type = implType,
comment = "IgnoredImplementation",
accepted = false
});
}
}
if (!implType.IsGenericType)
{
if (!builder.Type.IsGenericType || builder.Type.IsAssignableFrom(implType))
{
result.Add(ImplementationType.Accepted(implType));
}
}
else if (!implType.ContainsGenericParameters)
{
result.Add(ImplementationType.Accepted(implType));
}
else
{
var mapped = containerContext.genericsAutoCloser.AutoCloseDefinition(implType);
foreach (var type in mapped)
{
if (builder.Type.IsAssignableFrom(type))
{
result.Add(ImplementationType.Accepted(type));
}
}
if (builder.Type.IsGenericType)
{
var implInterfaces = implType.ImplementationsOf(builder.Type.GetGenericTypeDefinition());
foreach (var implInterface in implInterfaces)
{
var closed = implType.TryCloseByPattern(implInterface, builder.Type);
if (closed != null)
{
result.Add(ImplementationType.Accepted(closed));
}
}
}
if (builder.Arguments == null)
{
continue;
}
var serviceConstructor = implType.GetConstructor();
if (!serviceConstructor.isOk)
{
continue;
}
foreach (var formalParameter in serviceConstructor.value.GetParameters())
{
if (!formalParameter.ParameterType.ContainsGenericParameters)
{
continue;
}
ValueWithType parameterValue;
if (!builder.Arguments.TryGet(formalParameter.Name, out parameterValue))
{
continue;
}
var parameterType = parameterValue.value == null ? parameterValue.type : parameterValue.value.GetType();
var implInterfaces = formalParameter.ParameterType.IsGenericParameter
? new List <Type>(1)
{
parameterType
}
: parameterType.ImplementationsOf(formalParameter.ParameterType.GetGenericTypeDefinition());
foreach (var implInterface in implInterfaces)
{
var closedItem = implType.TryCloseByPattern(formalParameter.ParameterType, implInterface);
if (closedItem != null)
{
result.Add(ImplementationType.Accepted(closedItem));
}
}
}
}
}
return(result);
}
private void InstantiateInterface(ContainerService.Builder builder)
{
HashSet <ImplementationType> implementationTypes;
try
{
implementationTypes = GetImplementationTypes(builder);
}
catch (Exception e)
{
builder.SetError(e);
return;
}
ApplySelectors(implementationTypes, builder);
if (implementationTypes.Count == 0)
{
builder.SetComment("has no implementations");
return;
}
Func <object> factory = null;
var canUseFactory = true;
foreach (var implementationType in implementationTypes)
{
if (implementationType.accepted)
{
var implementationService = ResolveCore(ServiceName.Parse(implementationType.type, InternalHelpers.emptyStrings),
builder.CreateNew, builder.Arguments, builder.Context);
builder.LinkTo(containerContext, implementationService, implementationType.comment);
if (builder.CreateNew && builder.Arguments == null &&
implementationService.Status == ServiceStatus.Ok && canUseFactory)
{
if (factory == null)
{
if (!factoryCache.TryGetValue(implementationService.Name, out factory))
{
canUseFactory = false;
}
}
else
{
canUseFactory = false;
}
}
if (builder.Status.IsBad())
{
return;
}
}
else
{
var dependency = containerContext.NotResolved(null, implementationType.type.FormatName());
dependency.Comment = implementationType.comment;
builder.AddDependency(dependency, true);
}
}
builder.EndResolveDependencies();
if (factory != null && canUseFactory)
{
factoryCache.TryAdd(builder.GetFinalName(), factory);
}
}
internal ContainerService ResolveCore(ServiceName name, bool createNew, IObjectAccessor arguments, ResolutionContext context)
{
var pushedContracts = context.Contracts.Push(name.Contracts);
var declaredName = new ServiceName(name.Type, context.Contracts.Snapshot());
if (context.HasCycle(declaredName))
{
var message = string.Format("cyclic dependency for service [{0}], stack\r\n{1}",
declaredName.Type.FormatName(), context.FormatStack() + "\r\n\t" + declaredName);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
return(ContainerService.Error(declaredName, message));
}
if (!pushedContracts.isOk)
{
const string messageFormat = "contract [{0}] already declared, stack\r\n{1}";
var message = string.Format(messageFormat, pushedContracts.duplicatedContractName,
context.FormatStack() + "\r\n\t" + name);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
return(ContainerService.Error(name, message));
}
context.ConstructingServices.Add(declaredName);
ServiceConfiguration configuration = null;
Exception configurationException = null;
try
{
configuration = GetConfiguration(declaredName.Type, context);
}
catch (Exception e)
{
configurationException = e;
}
var actualName = configuration != null && configuration.FactoryDependsOnTarget && context.Stack.Count > 0
? declaredName.AddContracts(context.TopBuilder.Type.FormatName())
: declaredName;
ContainerServiceId id = null;
if (!createNew)
{
id = instanceCache.GetOrAdd(actualName, createId);
var acquireResult = id.AcquireInstantiateLock();
if (!acquireResult.acquired)
{
context.ConstructingServices.Remove(declaredName);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
return(acquireResult.alreadyConstructedService);
}
}
var builder = new ContainerService.Builder(actualName);
context.Stack.Add(builder);
builder.Context = context;
builder.DeclaredContracts = actualName.Contracts;
if (configuration == null)
{
builder.SetError(configurationException);
}
else
{
builder.SetConfiguration(configuration);
builder.ExpandedUnions = context.Contracts.TryExpandUnions(Configuration);
if (builder.ExpandedUnions.HasValue)
{
var poppedContracts = context.Contracts.PopMany(builder.ExpandedUnions.Value.contracts.Length);
foreach (var c in builder.ExpandedUnions.Value.contracts.CartesianProduct())
{
var childService = ResolveCore(new ServiceName(name.Type, c), createNew, arguments, context);
builder.LinkTo(containerContext, childService, null);
if (builder.Status.IsBad())
{
break;
}
}
context.Contracts.PushNoCheck(poppedContracts);
}
else
{
builder.CreateNew = createNew;
builder.Arguments = arguments;
Instantiate(builder);
}
}
context.ConstructingServices.Remove(declaredName);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
context.Stack.RemoveLast();
var result = builder.GetService();
if (id != null)
{
id.ReleaseInstantiateLock(builder.Context.AnalizeDependenciesOnly ? null : result);
}
return(result);
}
internal ContainerService ResolveCore(ServiceName name, bool createNew, IObjectAccessor arguments, ResolutionContext context)
{
var pushedContracts = context.Contracts.Push(name.Contracts);
var declaredName = new ServiceName(name.Type, context.Contracts.Snapshot());
if (context.HasCycle(declaredName))
{
var message = string.Format("cyclic dependency for service [{0}], stack\r\n{1}",
declaredName.Type.FormatName(), context.FormatStack() + "\r\n\t" + declaredName);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
return ContainerService.Error(declaredName, message);
}
if (!pushedContracts.isOk)
{
const string messageFormat = "contract [{0}] already declared, stack\r\n{1}";
var message = string.Format(messageFormat, pushedContracts.duplicatedContractName,
context.FormatStack() + "\r\n\t" + name);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
return ContainerService.Error(name, message);
}
context.ConstructingServices.Add(declaredName);
ServiceConfiguration configuration = null;
Exception configurationException = null;
try
{
configuration = GetConfiguration(declaredName.Type, context);
}
catch (Exception e)
{
configurationException = e;
}
var actualName = configuration != null && configuration.FactoryDependsOnTarget && context.Stack.Count > 0
? declaredName.AddContracts(context.TopBuilder.Type.FormatName())
: declaredName;
ContainerServiceId id = null;
if (!createNew)
{
id = instanceCache.GetOrAdd(actualName, createId);
var acquireResult = id.AcquireInstantiateLock();
if (!acquireResult.acquired)
{
context.ConstructingServices.Remove(declaredName);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
return acquireResult.alreadyConstructedService;
}
}
var builder = new ContainerService.Builder(actualName);
context.Stack.Add(builder);
builder.Context = context;
builder.DeclaredContracts = actualName.Contracts;
if (configuration == null)
builder.SetError(configurationException);
else
{
builder.SetConfiguration(configuration);
builder.ExpandedUnions = context.Contracts.TryExpandUnions(Configuration);
if (builder.ExpandedUnions.HasValue)
{
var poppedContracts = context.Contracts.PopMany(builder.ExpandedUnions.Value.contracts.Length);
foreach (var c in builder.ExpandedUnions.Value.contracts.CartesianProduct())
{
var childService = ResolveCore(new ServiceName(name.Type, c), createNew, arguments, context);
builder.LinkTo(containerContext, childService, null);
if (builder.Status.IsBad())
break;
}
context.Contracts.PushNoCheck(poppedContracts);
}
else
{
builder.CreateNew = createNew;
builder.Arguments = arguments;
Instantiate(builder);
}
}
context.ConstructingServices.Remove(declaredName);
context.Contracts.RemoveLast(pushedContracts.pushedContractsCount);
context.Stack.RemoveLast();
var result = builder.GetService();
if (id != null)
id.ReleaseInstantiateLock(builder.Context.AnalizeDependenciesOnly ? null : result);
return result;
}
internal ServiceDependency InstantiateDependency(ParameterInfo formalParameter, ContainerService.Builder builder)
{
ValueWithType actualArgument;
if (builder.Arguments != null && builder.Arguments.TryGet(formalParameter.Name, out actualArgument))
return containerContext.Constant(formalParameter, actualArgument.value);
var parameters = builder.Configuration.ParametersSource;
object actualParameter;
if (parameters != null && parameters.TryGet(formalParameter.Name, formalParameter.ParameterType, out actualParameter))
return containerContext.Constant(formalParameter, actualParameter);
var dependencyConfiguration = builder.Configuration.GetOrNull(formalParameter);
Type implementationType = null;
if (dependencyConfiguration != null)
{
if (dependencyConfiguration.ValueAssigned)
return containerContext.Constant(formalParameter, dependencyConfiguration.Value);
if (dependencyConfiguration.Factory != null)
{
var dependencyBuilder = new ContainerService.Builder(new ServiceName(formalParameter.ParameterType))
{
Context = builder.Context,
DependencyName = formalParameter.Name
};
builder.Context.Stack.Add(dependencyBuilder);
dependencyBuilder.CreateInstanceBy(CallTarget.F(dependencyConfiguration.Factory), true);
builder.Context.Stack.RemoveLast();
return dependencyBuilder.GetService().AsDependency(containerContext, formalParameter.Name, false);
}
implementationType = dependencyConfiguration.ImplementationType;
}
implementationType = implementationType ?? formalParameter.ParameterType;
FromResourceAttribute resourceAttribute;
if (implementationType == typeof (Stream) && formalParameter.TryGetCustomAttribute(out resourceAttribute))
{
var resourceStream = builder.Type.Assembly.GetManifestResourceStream(builder.Type, resourceAttribute.Name);
if (resourceStream == null)
return containerContext.Error(null, formalParameter.Name,
"can't find resource [{0}] in namespace of [{1}], assembly [{2}]",
resourceAttribute.Name, builder.Type, builder.Type.Assembly.GetName().Name);
return containerContext.Resource(formalParameter, resourceAttribute.Name, resourceStream);
}
var dependencyName = ServiceName.Parse(implementationType.UnwrapEnumerable(),
InternalHelpers.ParseContracts(formalParameter));
if (dependencyName.Type.IsSimpleType())
{
if (!formalParameter.HasDefaultValue)
return containerContext.Error(null, formalParameter.Name,
"parameter [{0}] of service [{1}] is not configured",
formalParameter.Name, builder.Type.FormatName());
return containerContext.Constant(formalParameter, formalParameter.DefaultValue);
}
var resultService = ResolveCore(dependencyName, false, null, builder.Context);
if (resultService.Status.IsBad())
return containerContext.ServiceError(resultService);
var isEnumerable = dependencyName.Type != implementationType;
if (isEnumerable)
return containerContext.Service(resultService, resultService.GetAllValues());
if (resultService.Status == ServiceStatus.NotResolved)
{
if (formalParameter.HasDefaultValue)
return containerContext.Service(resultService, formalParameter.DefaultValue);
if (formalParameter.IsDefined<OptionalAttribute>() || formalParameter.IsDefined("CanBeNullAttribute"))
return containerContext.Service(resultService, null);
return containerContext.NotResolved(resultService);
}
return resultService.AsDependency(containerContext, null, false);
}
public ContainerService Resolve(ServiceName name)
{
if (name.Contracts.Length == 0)
return Container.ResolveSingleton(name.Type, this);
var pushedCount = 0;
foreach (var newContract in name.Contracts)
{
foreach (var c in Contracts)
if (newContract.EqualsIgnoringCase(c))
{
var resultBuilder = new ContainerService.Builder(name.Type, this, false, null);
const string messageFormat = "contract [{0}] already declared, all declared contracts [{1}]";
resultBuilder.SetError(string.Format(messageFormat, newContract, InternalHelpers.FormatContractsKey(Contracts)));
Contracts.RemoveLast(pushedCount);
return resultBuilder.Build();
}
Contracts.Add(newContract);
pushedCount++;
}
var result = Container.ResolveSingleton(name.Type, this);
Contracts.RemoveLast(name.Contracts.Length);
return result;
}
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);
}
