private bool IsRegistered(Type type, string instanceName = null)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
var key = new ServiceMappingKey(type, instanceName);
return(_registeredServices.ContainsKey(key));
}
public object Resolve(Type type, string instanceName = null)
{
if (!IsRegistered(type, instanceName))
{
return(null);
}
ServiceMappingKey key = new ServiceMappingKey(type, instanceName);
object instance;
if (_instancesCache.TryGetValue(key, out instance))
{
return(instance);
}
instance = Activator.CreateInstance(_registeredServices[key]);
_instancesCache.Add(key, instance);
return(instance);
}
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
ServiceMappingKey compareTo = obj as ServiceMappingKey;
if (ReferenceEquals(this, compareTo))
{
return(true);
}
if (compareTo == null)
{
return(false);
}
return(Type.Equals(compareTo.Type) &&
string.Equals(InstanceName, compareTo.InstanceName, StringComparison.CurrentCultureIgnoreCase));
}
public void ReplaceMapping(Type from, Type to)
{
if (to == null)
{
throw new ArgumentNullException("to");
}
if (!from.GetTypeInfo().IsAssignableFrom(to.GetTypeInfo()))
{
string errorMessage = string.Format("Error trying to register the instance: '{0}' is not assignable from '{1}'",
from.FullName, to.FullName);
throw new InvalidOperationException(errorMessage);
}
ServiceMappingKey key = new ServiceMappingKey(from, null);
if (_registeredServices.ContainsKey(key))
{
_registeredServices[key] = to;
return;
}
_registeredServices.Add(key, to);
}
public void Register(Type from, Type to, string instanceName = null)
{
if (to == null)
{
throw new ArgumentNullException("to");
}
if (!from.GetTypeInfo().IsAssignableFrom(to.GetTypeInfo()))
{
string errorMessage = string.Format("Error trying to register the instance: '{0}' is not assignable from '{1}'",
from.FullName, to.FullName);
throw new InvalidOperationException(errorMessage);
}
ServiceMappingKey key = new ServiceMappingKey(from, instanceName);
if (_registeredServices.ContainsKey(key))
{
const string errorMessageFormat = "The requested mapping already exists - {0}";
throw new InvalidOperationException(string.Format(errorMessageFormat, key.ToString()));
}
_registeredServices.Add(key, to);
}
