private static Expression TryCreatePropertySetterExpression(
PropertyInfo property,
IContainer container,
ConstructionFactorySettings settings,
ParameterExpression contextExpression,
ParameterExpression serviceExpression)
{
var activator = TryGetActivator(property.PropertyType, property.Name, container, settings);
if (activator == null)
{
return(null);
}
var propertyValueExpression = CreateActivationExpression(activator, contextExpression);
var setterExpression = Expression.Call(serviceExpression, property.SetMethod, new[] { propertyValueExpression });
return(setterExpression);
}
private static ServiceIdentity GetServiceIdentity(Type serviceType, string referenceName, ConstructionFactorySettings settings)
{
// First try to get a specific identity based on the parameter name.
if (settings.UsePrefixResolution)
{
var identity = serviceType.TryGetServiceIdentity(referenceName);
if (identity != null)
{
return(identity);
}
}
// Use default identity if no specific could be created based on parameter name.
return(new ServiceIdentity(serviceType));
}
private static IActivator TryGetActivator(Type serviceType, string referenceName, IContainer container, ConstructionFactorySettings settings)
{
var typeInfo = serviceType.GetTypeInfo();
if (typeInfo.IsValueType)
{
return(null);
}
var serviceIdentity = GetServiceIdentity(serviceType, referenceName, settings);
var activator = container.GetActivator(serviceIdentity);
if (activator == null)
{
return(null);
}
return(activator);
}
private static IActivator[] TryGetParameterActivators(ParameterInfo[] parameters, IContainer container, ConstructionFactorySettings settings)
{
var activators = new IActivator[parameters.Length];
for (var i = 0; i < parameters.Length; i++)
{
var parameter = parameters[i];
var activator = TryGetActivator(parameter.ParameterType, parameter.Name, container, settings);
if (activator == null)
{
return(null);
}
activators[i] = activator;
}
return(activators);
}
private static ConstructorDetails TryGetConstructorDetails(TypeInfo typeInfo, IContainer container, ConstructionFactorySettings settings)
{
var candidates =
from constructor in typeInfo.DeclaredConstructors
where constructor.IsStatic == false
let parameters = constructor.GetParameters()
orderby parameters.Length descending
let activators = TryGetParameterActivators(parameters, container, settings)
where activators != null
select new ConstructorDetails
{
ConstructorInfo = constructor,
Parameters = parameters,
Activators = activators
};
return(candidates.FirstOrDefault());
}
