/// <summary>
/// Default constructor
/// </summary>
/// <param name="arrayExpressionCreator"></param>
/// <param name="enumerableExpressionCreator"></param>
/// <param name="wrapperExpressionCreator"></param>
public ActivationExpressionBuilder(IArrayExpressionCreator arrayExpressionCreator,
IEnumerableExpressionCreator enumerableExpressionCreator,
IWrapperExpressionCreator wrapperExpressionCreator)
{
EnumerableExpressionCreator = enumerableExpressionCreator;
ArrayExpressionCreator = arrayExpressionCreator;
WrapperExpressionCreator = wrapperExpressionCreator;
}
/// <summary>
/// Get expression for creating enumerable
/// </summary>
/// <param name="scope">scope for strategy</param>
/// <param name="request">request</param>
/// <param name="arrayExpressionCreator">array expression creator</param>
/// <returns></returns>
public IActivationExpressionResult GetEnumerableExpression(IInjectionScope scope, IActivationExpressionRequest request,
IArrayExpressionCreator arrayExpressionCreator)
{
var enumerableCreator = scope.ScopeConfiguration.Behaviors.CustomEnumerableCreator;
return(enumerableCreator != null
? CreateEnumerableExpressionUsingCustomCreator(scope, request, arrayExpressionCreator, enumerableCreator)
: CreateEnumerableExpressionUsingArrayExpression(scope, request, arrayExpressionCreator));
}
/// <summary>
/// Default constructor
/// </summary>
/// <param name="arrayExpressionCreator"></param>
/// <param name="enumerableExpressionCreator"></param>
/// <param name="wrapperExpressionCreator"></param>
/// <param name="contextValueProvider"></param>
public ActivationExpressionBuilder(IArrayExpressionCreator arrayExpressionCreator,
IEnumerableExpressionCreator enumerableExpressionCreator,
IWrapperExpressionCreator wrapperExpressionCreator,
IInjectionContextValueProvider contextValueProvider)
{
EnumerableExpressionCreator = enumerableExpressionCreator;
ArrayExpressionCreator = arrayExpressionCreator;
WrapperExpressionCreator = wrapperExpressionCreator;
_contextValueProvider = contextValueProvider;
}
/// <summary>
/// Create enumerable expression using a custom creator
/// </summary>
/// <param name="scope">injection scope</param>
/// <param name="request">expression request</param>
/// <param name="arrayExpressionCreator">array creator</param>
/// <param name="enumerableCreator">custom enumerable creator</param>
/// <returns></returns>
protected virtual IActivationExpressionResult CreateEnumerableExpressionUsingCustomCreator(IInjectionScope scope,
IActivationExpressionRequest request, IArrayExpressionCreator arrayExpressionCreator,
IEnumerableCreator enumerableCreator)
{
var enumerableType = request.ActivationType.GenericTypeArguments[0];
var arrayType = enumerableType.MakeArrayType();
var newRequest =
request.NewRequest(arrayType, request.RequestingStrategy,
request.RequestingStrategy?.ActivationType, request.RequestType, request.Info, true, true);
newRequest.SetFilter(request.Filter);
newRequest.SetEnumerableComparer(request.EnumerableComparer);
var arrayExpression = arrayExpressionCreator.GetArrayExpression(scope, newRequest);
var enumerableExpression =
Expression.Call(Expression.Constant(enumerableCreator),
CreateEnumerableMethod.MakeGenericMethod(enumerableType),
request.ScopeParameter,
arrayExpression.Expression);
var returnResult = request.Services.Compiler.CreateNewResult(request, enumerableExpression);
returnResult.AddExpressionResult(returnResult);
return(returnResult);
}
/// <summary>
/// Create enumerable expression that is an array
/// </summary>
/// <param name="scope"></param>
/// <param name="request"></param>
/// <param name="arrayExpressionCreator"></param>
/// <returns></returns>
protected virtual IActivationExpressionResult CreateEnumerableExpressionUsingArrayExpression(IInjectionScope scope,
IActivationExpressionRequest request, IArrayExpressionCreator arrayExpressionCreator)
{
var enumerableType = request.ActivationType.GenericTypeArguments[0];
var arrayType = enumerableType.MakeArrayType();
var newRequest = request.NewRequest(arrayType, request.RequestingStrategy,
request.RequestingStrategy?.ActivationType, request.RequestType, request.Info, true, true);
newRequest.SetFilter(request.Filter);
newRequest.SetEnumerableComparer(request.EnumerableComparer);
newRequest.SetLocateKey(request.LocateKey);
var arrayExpression = arrayExpressionCreator.GetArrayExpression(scope, newRequest);
return(arrayExpression);
}
