/// <summary>
/// Process expression result for compiling
/// </summary>
/// <param name="expressionContext"></param>
/// <param name="parameters"></param>
/// <param name="extraExpressions"></param>
/// <returns></returns>
protected virtual Expression ProcessExpressionResultForCompile(IActivationExpressionResult expressionContext,
out ParameterExpression[] parameters, out Expression[] extraExpressions)
{
if (expressionContext.Request.InjectionContextRequired())
{
AddInjectionContextExpression(expressionContext);
}
var finalExpression = expressionContext.Expression;
if (!finalExpression.Type.IsByRef)
{
finalExpression = Expression.Convert(finalExpression, typeof(object));
}
if (finalExpression.NodeType == ExpressionType.Convert &&
!expressionContext.Expression.Type.GetTypeInfo().IsValueType)
{
finalExpression = ((UnaryExpression)finalExpression).Operand;
}
parameters = expressionContext.ExtraParameters().ToArray();
extraExpressions = expressionContext.ExtraExpressions().ToArray();
return(finalExpression);
}
/// <summary>
/// Default constructor
/// </summary>
/// <param name="expressionResult"></param>
public DynamicMethodGenerationRequest(IActivationExpressionResult expressionResult, Func <DynamicMethodGenerationRequest, Expression, bool> tryGenerateIL, ParameterExpression[] extraParameters)
{
ExpressionResult = expressionResult;
TryGenerateIL = tryGenerateIL;
ExtraParameters = extraParameters;
ExpressionRequest = ExpressionResult.Request;
}
/// <summary>
/// Select the best strategy from collection to satisfy request
/// </summary>
/// <param name="collection"></param>
/// <param name="scope"></param>
/// <param name="request"></param>
/// <returns></returns>
protected virtual IActivationExpressionResult SelectStrategyFromCollection(IActivationStrategyCollection <ICompiledExportStrategy> collection, IInjectionScope scope, IActivationExpressionRequest request)
{
var filter = request.Filter;
IActivationExpressionResult result = null;
foreach (var strategy in collection.GetStrategies())
{
if (filter != null && !filter(strategy))
{
continue;
}
if (strategy.HasConditions)
{
var context = request.GetStaticInjectionContext();
if (!strategy.Conditions.All(condition => condition.MeetsCondition(strategy, context)))
{
continue;
}
}
result = strategy.GetActivationExpression(scope, request);
if (result != null)
{
break;
}
}
return(result);
}
/// <summary>
/// Compiles an expression result to a delegate
/// </summary>
/// <param name="expressionContext"></param>
/// <param name="parameters"></param>
/// <param name="extraExpressions"></param>
/// <param name="finalExpression"></param>
/// <returns></returns>
protected virtual ActivationStrategyDelegate CompileExpressionResultToDelegate(
IActivationExpressionResult expressionContext, ParameterExpression[] parameters, Expression[] extraExpressions,
Expression finalExpression)
{
Expression compileExpression;
if (parameters.Length == 0 &&
extraExpressions.Length == 0)
{
compileExpression = finalExpression;
}
else
{
var list = new List <Expression>(expressionContext.ExtraExpressions())
{
finalExpression
};
compileExpression = Expression.Block(expressionContext.ExtraParameters(), list);
}
var compiled =
Expression.Lambda <ActivationStrategyDelegate>(compileExpression,
expressionContext.Request.Constants.ScopeParameter,
expressionContext.Request.Constants.RootDisposalScope,
expressionContext.Request.Constants.InjectionContextParameter).Compile();
return(compiled);
}
/// <summary>
/// try to create delegate using IL generation
/// </summary>
/// <param name="expressionContext">expression context</param>
/// <param name="finalExpression">final expression to convert</param>
/// <param name="newDelegate">created delegate</param>
/// <returns>true if delegate was created</returns>
public virtual bool TryCreateDelegate(IActivationExpressionResult expressionContext, Expression finalExpression,
out ActivationStrategyDelegate newDelegate)
{
newDelegate = null;
try
{
var request = new DynamicMethodGenerationRequest(expressionContext, TryGenerateIL);
var constants = new List <object>();
if (!ImplementationFactory.Locate <IConstantExpressionCollector>().GetConstantExpressions(finalExpression, constants))
{
return(false);
}
request.Constants = constants;
var target = ImplementationFactory.Locate <IDynamicMethodTargetCreator>().CreateMethodTarget(request);
if (target == null)
{
return(false);
}
request.Target = target;
var method = new DynamicMethod(string.Empty,
typeof(object),
new[]
{
target.GetType(),
typeof(IExportLocatorScope),
typeof(IDisposalScope),
typeof(IInjectionContext)
},
target.GetType(),
true);
request.ILGenerator = method.GetILGenerator();
if (!TryGenerateIL(request, finalExpression))
{
return(false);
}
request.ILGenerator.Emit(OpCodes.Ret);
newDelegate = (ActivationStrategyDelegate)method.CreateDelegate(typeof(ActivationStrategyDelegate), target);
return(true);
}
catch (Exception)
{
// ignore exception and compile linq expression normally
}
return(false);
}
/// <summary>
/// Replace values in expression
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public IActivationExpressionResult Replace(Expression expression)
{
_result = _request.Services.Compiler.CreateNewResult(_request);
_result.Expression = Visit(expression);
return(_result);
}
public T CompileOptimizedDelegate <T>(IInjectionScope scope, IActivationExpressionResult expressionContext)
{
ParameterExpression[] parameters;
Expression[] extraExpressions;
var finalExpression = ProcessExpressionResultForCompile(expressionContext, out parameters, out extraExpressions);
var compiled = CompileExpressionResultToOpitimzed <T>(expressionContext, parameters, extraExpressions, finalExpression);
return(compiled);
}
//TODO: Typo in method name.
protected virtual T CompileExpressionResultToOpitimzed <T>(
IActivationExpressionResult expressionContext, ParameterExpression[] parameters, Expression[] extraExpressions,
Expression finalExpression)
{
Expression compileExpression;
if (parameters.Length == 0 &&
extraExpressions.Length == 0)
{
compileExpression = finalExpression;
}
else
{
var list = new List <Expression>(expressionContext.ExtraExpressions())
{
finalExpression
};
compileExpression = Expression.Block(expressionContext.ExtraParameters(), list);
}
var parameterList = new List <ParameterExpression>();
var invokeMethod = typeof(T).GetTypeInfo().GetDeclaredMethod("Invoke");
var parameterInfos = invokeMethod.GetParameters();
if (parameterInfos.Length > 3)
{
throw new Exception("Delegate type not supported: " + typeof(T).Name);
}
if (parameterInfos.Length > 0)
{
parameterList.Add(expressionContext.Request.Constants.ScopeParameter);
}
if (parameterInfos.Length > 1)
{
parameterList.Add(expressionContext.Request.Constants.RootDisposalScope);
}
if (parameterInfos.Length > 2)
{
parameterList.Add(expressionContext.Request.Constants.InjectionContextParameter);
}
var compiled =
Expression.Lambda <T>(compileExpression, parameterList).Compile();
return(compiled);
}
private static ParameterExpression CreateVariablExpression(TypeActivationConfiguration activationConfiguration,
IActivationExpressionResult activationExpressionResult)
{
var variablExpression = Expression.Variable(activationConfiguration.ActivationType);
activationExpressionResult.AddExtraParameter(variablExpression);
activationExpressionResult.AddExtraExpression(Expression.Assign(variablExpression,
activationExpressionResult.Expression));
activationExpressionResult.Expression = variablExpression;
return(variablExpression);
}
/// <summary>
/// Create an array of expressions based off an array of types
/// </summary>
/// <param name="strategy"></param>
/// <param name="scope"></param>
/// <param name="request"></param>
/// <param name="resultType"></param>
/// <param name="types"></param>
/// <returns></returns>
public static IActivationExpressionResult[] CreateExpressionsForTypes(IActivationStrategy strategy, IInjectionScope scope,
IActivationExpressionRequest request, Type resultType, params Type[] types)
{
var resultArray = new IActivationExpressionResult[types.Length];
for (var i = 0; i < types.Length; i++)
{
var arg1Request = request.NewRequest(types[i], strategy, resultType, RequestType.Other, null, true, true);
resultArray[i] = request.Services.ExpressionBuilder.GetActivationExpression(scope, arg1Request);
}
return(resultArray);
}
protected override T CompileExpressionResultToOpitimzed <T>(IActivationExpressionResult expressionContext, ParameterExpression[] parameters,
Expression[] extraExpressions, Expression finalExpression)
{
T delegateValue =
(T)(object)_linqToDynamicMethodConverter.TryCreateDelegate(expressionContext, parameters, extraExpressions, finalExpression, typeof(T));
if (delegateValue != null)
{
return(delegateValue);
}
expressionContext.Request.RequestingScope.ScopeConfiguration.Trace?.Invoke($"Could not generate delegate for {expressionContext.Request.ActivationType.FullName} using DynamicMethod falling back to linq expressions");
return(base.CompileExpressionResultToOpitimzed <T>(expressionContext, parameters, extraExpressions, finalExpression));
}
private void AddInjectionContextExpression(IActivationExpressionResult expressionContext)
{
var method = typeof(IInjectionContextCreator).GetRuntimeMethod("CreateContext",
new[]
{
typeof(object)
});
var newExpression = Expression.Call(Expression.Constant(_injectionContextCreator),
method,
Expression.Constant(null, typeof(object)));
var assign =
Expression.Assign(expressionContext.Request.InjectionContextParameter, newExpression);
var ifThen =
Expression.IfThen(
Expression.Equal(expressionContext.Request.InjectionContextParameter,
Expression.Constant(null, typeof(IInjectionContext))),
assign);
expressionContext.AddExtraExpression(ifThen, insertBeginning: true);
}
/// <summary>
/// Creates member injection statements
/// </summary>
/// <param name="scope"></param>
/// <param name="request"></param>
/// <param name="activationConfiguration"></param>
/// <param name="result"></param>
/// <returns></returns>
protected virtual IActivationExpressionResult CreateMemberInjectExpressions(IInjectionScope scope, IActivationExpressionRequest request, TypeActivationConfiguration activationConfiguration, IActivationExpressionResult result)
{
var members = GetMemberInjectionInfoForConfiguration(scope, request, activationConfiguration);
if (members.Count == 0)
{
return(result);
}
ParameterExpression variable = result.Expression as ParameterExpression;
var newResult = request.Services.Compiler.CreateNewResult(request);
if (variable == null)
{
variable = Expression.Variable(result.Expression.Type);
newResult.AddExpressionResult(result);
newResult.AddExtraParameter(variable);
newResult.AddExtraExpression(Expression.Assign(variable, result.Expression));
}
foreach (var memberKVP in members)
{
var expression = memberKVP.Value.CreateExpression;
if (expression == null)
{
var memberType = memberKVP.Key.GetMemeberType();
var newRequest =
request.NewRequest(memberType, activationConfiguration.ActivationStrategy,
activationConfiguration.ActivationType, RequestType.Member, memberKVP.Key, false, true);
if (memberKVP.Value.LocateKey == null &&
scope.ScopeConfiguration.Behaviors.KeyedTypeSelector(memberType))
{
newRequest.SetLocateKey(memberKVP.Key.Name);
}
else
{
newRequest.SetLocateKey(memberKVP.Value.LocateKey);
}
newRequest.IsDynamic = memberKVP.Value.IsDynamic;
newRequest.SetIsRequired(memberKVP.Value.IsRequired);
newRequest.SetFilter(memberKVP.Value.Filter);
if (memberKVP.Value.DefaultValue != null)
{
newRequest.SetDefaultValue(
new DefaultValueInformation {
DefaultValue = memberKVP.Value.DefaultValue
});
}
var memberResult = request.Services.ExpressionBuilder.GetActivationExpression(scope, newRequest);
if (memberResult == null)
{
if (memberKVP.Value.IsRequired)
{
throw new LocateException(newRequest.GetStaticInjectionContext());
}
}
else
{
Expression memberExpression;
if (memberKVP.Key is FieldInfo)
{
memberExpression = Expression.Field(variable, memberKVP.Key as FieldInfo);
}
else if (memberKVP.Key is PropertyInfo)
{
memberExpression = Expression.Property(variable, (PropertyInfo)memberKVP.Key);
}
else
{
throw new LocateException(request.GetStaticInjectionContext(), $"{memberKVP.Key.GetType().Name} member type not supported");
}
newResult.AddExpressionResult(memberResult);
newResult.AddExtraExpression(Expression.Assign(memberExpression, memberResult.Expression));
}
}
else
{
Expression memberExpression;
if (memberKVP.Key is FieldInfo)
{
memberExpression = Expression.Field(variable, memberKVP.Key as FieldInfo);
}
else if (memberKVP.Key is PropertyInfo)
{
memberExpression = Expression.Property(variable, (PropertyInfo)memberKVP.Key);
}
else
{
throw new LocateException(request.GetStaticInjectionContext(), $"{memberKVP.Key.GetType().Name} member type not supported");
}
newResult.AddExtraExpression(Expression.Assign(memberExpression, expression));
}
}
newResult.Expression = variable;
return(newResult);
}
/// <summary>
/// Create enrichment expressions
/// </summary>
/// <param name="scope">scope for strategy</param>
/// <param name="request">request</param>
/// <param name="activationConfiguration">activation configuration</param>
/// <param name="result">expression result</param>
/// <returns></returns>
public IActivationExpressionResult CreateExpression(IInjectionScope scope, IActivationExpressionRequest request,
TypeActivationConfiguration activationConfiguration, IActivationExpressionResult result)
{
var expression = result.Expression;
foreach (var enrichmentDelegate in activationConfiguration.EnrichmentDelegates.Reverse())
{
var invokeMethod = enrichmentDelegate.GetType().GetRuntimeMethods().First(m => m.Name == "Invoke");
var expressions = new List <Expression>();
foreach (var parameter in invokeMethod.GetParameters())
{
if (parameter.ParameterType == expression.Type)
{
expressions.Add(expression);
}
else
{
var arg1Request = request.NewRequest(parameter.ParameterType, activationConfiguration.ActivationStrategy, expression.Type, RequestType.Other, null, true, true);
var activationExpression = request.Services.ExpressionBuilder.GetActivationExpression(scope, arg1Request);
result.AddExpressionResult(activationExpression);
expressions.Add(activationExpression.Expression);
}
}
expression = Expression.Call(Expression.Constant(enrichmentDelegate), invokeMethod,
expressions);
}
result.Expression = expression;
return(result);
}
public IActivationExpressionResult CreateExpression(IInjectionScope scope, IActivationExpressionRequest request,
TypeActivationConfiguration activationConfiguration, IActivationExpressionResult result)
{
var closedActionType = typeof(Action <>).MakeGenericType(activationConfiguration.ActivationType);
object disposalDelegate = null;
if (closedActionType == activationConfiguration.DisposalDelegate?.GetType())
{
disposalDelegate = activationConfiguration.DisposalDelegate;
}
MethodInfo closedGeneric;
Expression[] parameterExpressions;
var resultExpression = result.Expression;
if (resultExpression.Type != activationConfiguration.ActivationType)
{
resultExpression = Expression.Convert(resultExpression, activationConfiguration.ActivationType);
}
if (disposalDelegate != null)
{
closedGeneric = AddMethodWithCleanup.MakeGenericMethod(activationConfiguration.ActivationType);
parameterExpressions = new[] { request.DisposalScopeExpression, resultExpression, Expression.Convert(Expression.Constant(disposalDelegate), closedActionType) };
}
else
{
closedGeneric = AddMethod.MakeGenericMethod(activationConfiguration.ActivationType);
parameterExpressions = new[] { request.DisposalScopeExpression, resultExpression };
}
var disposalCall = Expression.Call(closedGeneric, parameterExpressions);
var disposalResult = request.Services.Compiler.CreateNewResult(request, disposalCall);
disposalResult.AddExpressionResult(result);
return(disposalResult);
}
private static Delegate CompileFuncDelage <T>(IActivationExpressionRequest request, IInjectionScope scope,
IActivationExpressionResult result)
{
return(request.Services.Compiler.CompileOptimizedDelegate <Func <T> >(scope, result));
}
private IActivationExpressionResult CreateTimedCreateExpression(IInjectionScope scope, IActivationExpressionRequest request, TypeActivationConfiguration activationConfiguration, IActivationExpressionResult expression)
{
var result = request.Services.Compiler.CreateNewResult(request);
var returnVar = Expression.Variable(typeof(object));
var staticContext = request.GetStaticInjectionContext();
var callExpression = Expression.Call(Expression.Constant(this),
PreBuildUpMethodInfo,
Expression.Constant(staticContext),
request.Constants.ScopeParameter,
request.InjectionContextParameter);
result.AddExtraParameter(returnVar);
result.AddExtraExpression(Expression.Assign(returnVar, callExpression));
result.AddExtraExpression(
Expression.IfThen(Expression.Equal(returnVar,
Expression.Constant(null, typeof(object))),
Expression.Assign(returnVar, expression.Expression)));
result.Expression = Expression.Call(Expression.Constant(this),
PostBuildUpMethodInfo,
returnVar,
Expression.Constant(staticContext),
request.ScopeParameter,
request.InjectionContextParameter);
return(result);
}
/// <summary>
/// Create expressions for calling methods
/// </summary>
/// <param name="scope">scope for strategy</param>
/// <param name="request">request</param>
/// <param name="activationConfiguration">configuration information</param>
/// <param name="activationExpressionResult">expression result</param>
/// <returns>expression result</returns>
public IActivationExpressionResult CreateExpression(IInjectionScope scope, IActivationExpressionRequest request, TypeActivationConfiguration activationConfiguration, IActivationExpressionResult activationExpressionResult)
{
ParameterExpression variableExpression = null;
foreach (var selector in activationConfiguration.MemberInjectionSelectors)
{
foreach (var methodInjectionInfo in selector.GetMethods(activationConfiguration.ActivationType, request.RequestingScope, request))
{
if (variableExpression == null)
{
variableExpression = CreateVariablExpression(activationConfiguration, activationExpressionResult);
}
AddMethodCall(scope, request, activationConfiguration, activationExpressionResult, methodInjectionInfo, variableExpression);
}
}
foreach (var methodInjectionInfo in activationConfiguration.MethodInjections)
{
if (variableExpression == null)
{
variableExpression = CreateVariablExpression(activationConfiguration, activationExpressionResult);
}
AddMethodCall(scope, request, activationConfiguration, activationExpressionResult, methodInjectionInfo, variableExpression);
}
if (activationConfiguration.ActivationMethod != null)
{
if (variableExpression == null)
{
variableExpression = CreateVariablExpression(activationConfiguration, activationExpressionResult);
}
AddMethodCall(scope, request, activationConfiguration, activationExpressionResult, activationConfiguration.ActivationMethod, variableExpression);
}
return(activationExpressionResult);
}
/// <summary>
/// Default constructor
/// </summary>
/// <param name="expressionResult"></param>
public DynamicMethodGenerationRequest(IActivationExpressionResult expressionResult, Func <DynamicMethodGenerationRequest, Expression, bool> tryGenerateIL)
{
ExpressionResult = expressionResult;
TryGenerateIL = tryGenerateIL;
ExpressionRequest = ExpressionResult.Request;
}
/// <summary>
/// try to create delegate using IL generation
/// </summary>
/// <param name="expressionContext">expression context</param>
/// <param name="parameters"></param>
/// <param name="extraExpressions"></param>
/// <param name="finalExpression">final expression to convert</param>
/// <param name="newDelegate">created delegate</param>
/// <returns>true if delegate was created</returns>
public virtual bool TryCreateDelegate(IActivationExpressionResult expressionContext, ParameterExpression[] parameters, Expression[] extraExpressions, Expression finalExpression, out ActivationStrategyDelegate newDelegate)
{
newDelegate = null;
try
{
var request = new DynamicMethodGenerationRequest(expressionContext, TryGenerateIL, parameters);
var constants = new List <object>();
foreach (var expression in extraExpressions)
{
if (!ImplementationFactory.Locate <IConstantExpressionCollector>().GetConstantExpressions(expression, constants))
{
return(false);
}
}
if (!ImplementationFactory.Locate <IConstantExpressionCollector>().GetConstantExpressions(finalExpression, constants))
{
return(false);
}
request.Constants = constants;
var target = ImplementationFactory.Locate <IDynamicMethodTargetCreator>().CreateMethodTarget(request);
if (target == null)
{
return(false);
}
request.Target = target;
var method = new DynamicMethod(string.Empty,
typeof(object),
new[]
{
target.GetType(),
typeof(IExportLocatorScope),
typeof(IDisposalScope),
typeof(IInjectionContext)
},
target.GetType(),
true);
request.ILGenerator = method.GetILGenerator();
foreach (var parameter in parameters)
{
request.ILGenerator.DeclareLocal(parameter.Type);
}
foreach (var expression in extraExpressions)
{
if (!TryGenerateIL(request, expression))
{
return(false);
}
}
if (!TryGenerateIL(request, finalExpression))
{
return(false);
}
request.ILGenerator.Emit(OpCodes.Ret);
newDelegate = (ActivationStrategyDelegate)method.CreateDelegate(typeof(ActivationStrategyDelegate), target);
return(true);
}
catch (Exception exp)
{
expressionContext.Request.RequestingScope.ScopeConfiguration.Trace?.Invoke($"Exception thrown while compiling dynamic method {exp.Message}");
}
return(false);
}
/// <summary>
/// Allow constructor selector to override method
/// </summary>
/// <param name="injectionScope"></param>
/// <param name="configuration"></param>
/// <param name="request"></param>
/// <param name="constructor"></param>
/// <param name="expression"></param>
/// <returns></returns>
protected virtual IActivationExpressionResult OverrideExpression(IInjectionScope injectionScope, TypeActivationConfiguration configuration, IActivationExpressionRequest request, ConstructorInfo constructor, IActivationExpressionResult expression)
{
return(expression);
}
/// <summary>
/// Compile a delegate
/// </summary>
/// <param name="scope"></param>
/// <param name="expressionContext"></param>
/// <returns></returns>
public virtual ActivationStrategyDelegate CompileDelegate(IInjectionScope scope, IActivationExpressionResult expressionContext)
{
ParameterExpression[] parameters;
Expression[] extraExpressions;
var finalExpression = ProcessExpressionResultForCompile(expressionContext, out parameters, out extraExpressions);
var compiled = CompileExpressionResultToDelegate(expressionContext, parameters, extraExpressions, finalExpression);
return(compiled);
}
/// <summary>
/// Compiles an expression result to a delegate
/// </summary>
/// <param name="expressionContext"></param>
/// <param name="parameters"></param>
/// <param name="extraExpressions"></param>
/// <param name="finalExpression"></param>
/// <returns></returns>
protected override ActivationStrategyDelegate CompileExpressionResultToDelegate(IActivationExpressionResult expressionContext,
ParameterExpression[] parameters, Expression[] extraExpressions, Expression finalExpression)
{
ActivationStrategyDelegate dynamicDelegate;
// try to create delegate, if not fall back to normal Linq Expression compile
if (_linqToDynamicMethodConverter.TryCreateDelegate(expressionContext, parameters, extraExpressions, finalExpression, out dynamicDelegate))
{
return(dynamicDelegate);
}
expressionContext.Request.RequestingScope.ScopeConfiguration.Trace?.Invoke($"Could not generate delegate for {expressionContext.Request.ActivationType.FullName} using DynamicMethod falling back to linq expressions");
return(base.CompileExpressionResultToDelegate(expressionContext, parameters, extraExpressions, finalExpression));
}
/// <summary>
/// Create member initialization statement if needed
/// </summary>
/// <param name="scope">scope for strategy</param>
/// <param name="request">expression request</param>
/// <param name="activationConfiguration">activation configuration</param>
/// <param name="result">initialization expression</param>
/// <returns></returns>
public IActivationExpressionResult CreateExpression(IInjectionScope scope, IActivationExpressionRequest request, TypeActivationConfiguration activationConfiguration, IActivationExpressionResult result)
{
var expression = result.Expression as NewExpression;
if (expression != null)
{
return(CreateNewMemeberInitExpression(scope, request, activationConfiguration, result, expression));
}
throw new NotSupportedException("Currently only memeber injection works for New expressions");
}
/// <summary>
/// Compiles an expression result to a delegate
/// </summary>
/// <param name="expressionContext"></param>
/// <param name="parameters"></param>
/// <param name="extraExpressions"></param>
/// <param name="finalExpression"></param>
/// <returns></returns>
protected override ActivationStrategyDelegate CompileExpressionResultToDelegate(IActivationExpressionResult expressionContext,
ParameterExpression[] parameters, Expression[] extraExpressions, Expression finalExpression)
{
if (parameters.Length == 0 &&
extraExpressions.Length == 0)
{
ActivationStrategyDelegate dynamicDelegate;
// try to create delegate, if not fall back to normal Linq Expression compile
if (_linqToDynamicMethodConverter.TryCreateDelegate(expressionContext, finalExpression, out dynamicDelegate))
{
return(dynamicDelegate);
}
}
return(base.CompileExpressionResultToDelegate(expressionContext, parameters, extraExpressions, finalExpression));
}
/// <summary>
/// Create member init expression
/// </summary>
/// <param name="scope">scope for configuration</param>
/// <param name="request">request</param>
/// <param name="activationConfiguration">activation configuration</param>
/// <param name="result">result from instantation</param>
/// <param name="newExpression">instantiation expression</param>
/// <returns></returns>
protected virtual IActivationExpressionResult CreateNewMemeberInitExpression(IInjectionScope scope, IActivationExpressionRequest request, TypeActivationConfiguration activationConfiguration, IActivationExpressionResult result, NewExpression newExpression)
{
var bindings = new List <MemberBinding>();
var members = GetMemberInjectionInfoForConfiguration(scope, request, activationConfiguration);
foreach (var memberKVP in members)
{
var expression = memberKVP.Value.CreateExpression;
if (expression == null)
{
var memberType = memberKVP.Key.GetMemeberType();
var newRequest =
request.NewRequest(memberType, activationConfiguration.ActivationStrategy, activationConfiguration.ActivationType, RequestType.Member, memberKVP.Key, false, true);
if (memberKVP.Value.LocateKey == null &&
scope.ScopeConfiguration.Behaviors.KeyedTypeSelector(memberType))
{
newRequest.SetLocateKey(memberKVP.Key.Name);
}
else
{
newRequest.SetLocateKey(memberKVP.Value.LocateKey);
}
newRequest.IsDynamic = memberKVP.Value.IsDynamic;
newRequest.SetIsRequired(memberKVP.Value.IsRequired);
newRequest.SetFilter(memberKVP.Value.Filter);
if (memberKVP.Value.DefaultValue != null)
{
newRequest.SetDefaultValue(new DefaultValueInformation {
DefaultValue = memberKVP.Value.DefaultValue
});
}
var memberResult = request.Services.ExpressionBuilder.GetActivationExpression(scope, newRequest);
if (memberResult == null)
{
if (memberKVP.Value.IsRequired)
{
throw new LocateException(newRequest.GetStaticInjectionContext());
}
}
else
{
bindings.Add(Expression.Bind(memberKVP.Key, memberResult.Expression));
result.AddExpressionResult(memberResult);
}
}
else
{
bindings.Add(Expression.Bind(memberKVP.Key, expression));
}
}
if (bindings.Count > 0)
{
result.Expression = Expression.MemberInit(newExpression, bindings);
}
return(result);
}
/// <summary>
/// Create member initialization statement if needed
/// </summary>
/// <param name="scope">scope for strategy</param>
/// <param name="request">expression request</param>
/// <param name="activationConfiguration">activation configuration</param>
/// <param name="result">initialization expression</param>
/// <returns></returns>
public IActivationExpressionResult CreateExpression(IInjectionScope scope, IActivationExpressionRequest request, TypeActivationConfiguration activationConfiguration, IActivationExpressionResult result)
{
var expression = result.Expression as NewExpression;
if (expression != null)
{
return(CreateNewMemeberInitExpression(scope, request, activationConfiguration, result, expression));
}
return(CreateMemberInjectExpressions(scope, request, activationConfiguration, result));
}
/// <summary>
/// Create expression to add instance to disposal scope
/// </summary>
/// <param name="scope">scope for strategy</param>
/// <param name="request">request</param>
/// <param name="activationConfiguration">activation configuration</param>
/// <param name="result">result for instantiation</param>
/// <returns></returns>
public IActivationExpressionResult CreateExpression(IInjectionScope scope, IActivationExpressionRequest request, TypeActivationConfiguration activationConfiguration, IActivationExpressionResult result)
{
var closedGeneric = AddMethod.MakeGenericMethod(activationConfiguration.ActivationType);
var closedActionType = typeof(Action <>).MakeGenericType(activationConfiguration.ActivationType);
object disposalDelegate = null;
if (closedActionType == activationConfiguration.DisposalDelegate?.GetType())
{
disposalDelegate = activationConfiguration.DisposalDelegate;
}
var disposalCall =
Expression.Call(request.DisposalScopeExpression, closedGeneric, result.Expression, Expression.Convert(Expression.Constant(disposalDelegate), closedActionType));
var disposalResult = request.Services.Compiler.CreateNewResult(request, disposalCall);
disposalResult.AddExpressionResult(result);
return(disposalResult);
}
/// <summary>
/// Add child expression result
/// </summary>
/// <param name="result">expression result</param>
public void AddExpressionResult(IActivationExpressionResult result)
{
_extraExpressions = _extraExpressions.AddRange(result.ExtraExpressions());
_parameterExpressions = _parameterExpressions.AddRange(result.ExtraParameters());
}
private static void AddMethodCall(IInjectionScope scope, IActivationExpressionRequest request,
TypeActivationConfiguration activationConfiguration, IActivationExpressionResult activationExpressionResult,
MethodInjectionInfo methodInjectionInfo, ParameterExpression variableExpression)
{
var parameterResults = new List <IActivationExpressionResult>();
foreach (var parameter in methodInjectionInfo.Method.GetParameters())
{
var parameterRequest = request.NewRequest(parameter.ParameterType,
activationConfiguration.ActivationStrategy, activationConfiguration.ActivationType,
RequestType.MethodParameter, parameter, false, true);
if (scope.ScopeConfiguration.Behaviors.KeyedTypeSelector(parameter.ParameterType))
{
parameterRequest.SetLocateKey(parameter.Name);
}
var parameterInfo = methodInjectionInfo.ParameterInfos()
.Where(p => p.ParameterName == parameter.Name)
.FirstOrDefault();
if (parameterInfo != null)
{
parameterRequest.SetIsRequired(parameterInfo.IsRequired);
parameterRequest.SetLocateKey(parameterInfo.LocateKey);
}
var result = request.Services.ExpressionBuilder.GetActivationExpression(scope, parameterRequest);
parameterResults.Add(result);
activationExpressionResult.AddExpressionResult(result);
}
activationExpressionResult.AddExtraExpression(Expression.Call(variableExpression,
methodInjectionInfo.Method, parameterResults.Select(r => r.Expression)));
}