/// <summary> Create an instance of a type assuming a parameterless constructor. </summary>
public object CreateInstance(Type implementationType)
{
// activator
if (_emptyActivators.TryGetValue(implementationType, out var activator))
{
return(activator());
}
var ctor = implementationType.GetConstructor(Type.EmptyTypes);
_emptyActivators[implementationType] = activator = DynamicMethodFactory.Build(implementationType, ctor);
return(activator());
}
/// <summary> Create an instance of a type assuming a parameterless constructor. </summary>
public object CreateInstance(Type implementationType)
{
// activator
ParameterlessObjectActivator activator;
if (!_emptyActivators.TryGetValue(implementationType, out activator))
{
ConstructorInfo ctor = implementationType.GetConstructor(Type.EmptyTypes);
_emptyActivators[implementationType] = activator = DynamicMethodFactory.Build(implementationType, ctor);
}
return(activator());
}
/// <summary> Create an instance of a type assuming a parameterless constructor. </summary>
public object CreateInstance(Type type)
{
Contract.Assert(!type.IsAbstract && !type.IsInterface,
"Cannot create instances of static, abstract, or interface types.");
// activator
if (_emptyActivators.TryGetValue(type, out var activator))
{
return(activator());
}
var ctor = type.GetConstructor(Type.EmptyTypes);
_emptyActivators[type] = activator = DynamicMethodFactory.Build(type, ctor);
return(activator());
}
/// <summary> Create an instance of a type assuming a set of parameters. </summary>
public object CreateInstance(Type implementationType, object[] args)
{
if (args == null || args.Length == 0)
{
return(CreateInstance(implementationType));
}
// activator
if (!_activators.TryGetValue(implementationType, out var activator))
{
var ctor = GetOrCacheConstructorForType(implementationType);
var parameters = GetOrCacheParametersForConstructor(ctor);
_activators[implementationType] = activator = DynamicMethodFactory.Build(implementationType, ctor, parameters);
}
return(activator(args));
}
