/// <summary>
/// Creates a Provider based on the specified type.
/// </summary>
/// <typeparam name="T">The type of provider to create.</typeparam>
/// <param name="providerDescriptor">The provider descriptor.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">providerDescriptor</exception>
/// <exception cref="CreateProviderException">
/// Error creating provider
/// </exception>
protected T CreateProvider <T>(IProviderDescriptor providerDescriptor) where T : IProvider
{
try
{
if (providerDescriptor == null)
{
throw new ArgumentNullException("providerDescriptor");
}
Type type = typeof(T);
if (!type.IsAssignableFrom(providerDescriptor.ProviderType))
{
throw new CreateProviderException(
string.Format("{0} should be assignable from {1}.",
type.Name,
providerDescriptor.ProviderType.Name
));
}
var instance = GenericMethodInvoker.Invoke(
this,
"Create",
providerDescriptor.ProviderType,
new object[] { },
BindingFlags.NonPublic | BindingFlags.Instance
);
if (instance == null)
{
throw new CreateProviderException(
string.Format(
"Could not create instance of type {0}. If you've got a Provider " +
"implementation that exposes constructor arguments then please consider " +
"using any of the existing dependency resolvers or write your " +
"own implementation.",
providerDescriptor.ProviderType.Name));
}
var provider = (IProvider)instance;
provider.Group = providerDescriptor.ProviderGroup;
provider.Name = providerDescriptor.ProviderName;
provider.Settings = providerDescriptor.ProviderSettings;
return((T)instance);
}
catch (Exception ex)
{
if (!(ex is CreateProviderException))
{
throw new CreateProviderException(
"Error creating provider.",
ex);
}
else
{
throw;
}
}
}
/// <summary>
/// Gets a setting with the specified name and of the specified type.
/// </summary>
/// <param name="settingName">The name of the setting to get.</param>
/// <param name="type">The type of the setting.</param>
/// <returns>The setting with the specified name of the specified type</returns>
public dynamic this[string settingName, Type type]
{
get
{
return(GenericMethodInvoker.Invoke(this, "Get",
type, new object[] { settingName }));
}
}
/// <summary>
/// Gets a setting with the specified name and of the specified generic type.
/// </summary>
/// <typeparam name="T">The generic type return.</typeparam>
/// <param name="settingName">The name of the setting to get.</param>
/// <returns>The setting with the specified name of the specified generic type.</returns>
public T Get <T>(string settingName)
{
if (string.IsNullOrEmpty(settingName))
{
throw new ArgumentException("settingName not set.");
}
if (!Contains(settingName))
{
throw new ArgumentException("settingName does not exist.");
}
Type type = typeof(T);
if (type.IsInterface)
{
throw new InvalidOperationException("Type cannot be an interface.");
}
var setting = _settings[settingName];
if (type.IsClass && !type.Equals(typeof(string)))
{
// if data parser wasn't set, then attempt to parse
// setting using the default PipedDataParser
if (string.IsNullOrEmpty(_dataParserType))
{
try
{
return(new PipeDelimitedDataParser().Parse <T>(setting));
}
catch (Exception ex)
{
throw new InvalidOperationException(
"Could not parse data with the default PipedDataParser," +
"please ensure that you set dataParserType and try again.",
ex);
}
}
else
{
var parser = (IDataParser)GenericMethodInvoker.Invoke(
DependencyResolver.Current,
"Resolve",
Type.GetType(_dataParserType),
new object[] { }
);
return(parser.Parse <T>(setting));
}
}
else
{
return((T)Convert.ChangeType(setting, type));
}
}
public async Task Overload_T_string_string()
{
var invoker = new GenericMethodInvoker(typeof(IDummyGrain), "Method", 1);
var mock = new FooGrain();
var result = await invoker.Invoke(mock, new object[]
{
typeof(bool),
typeof(bool), typeof(string), typeof(string),
false, "bar", "foo"
});
Assert.Equal(4, result);
}
public async Task Overload_Int_String_T()
{
var invoker = new GenericMethodInvoker(typeof(IDummyGrain), "Method", 1);
var mock = new FooGrain();
var result = await invoker.Invoke(mock, new object[]
{
typeof(bool),
typeof(int), typeof(string), typeof(bool),
42, "bar", true
});
Assert.Equal(3, result);
}
public async Task Overload_invoke_with_null()
{
var invoker = new GenericMethodInvoker(typeof(IDummyGrain), "Method", 2);
var mock = new FooGrain();
var result = await invoker.Invoke(mock, new object[]
{
typeof(string[]), typeof(double),
typeof(string[]), typeof(double),
null, 0.5d
});
Assert.Equal(6, result);
}
public async Task Overload_multiple_type_parameters()
{
var invoker = new GenericMethodInvoker(typeof(IDummyGrain), "Method", 2);
var mock = new FooGrain();
var result = await invoker.Invoke(mock, new object[]
{
typeof(string[]), typeof(double),
typeof(string[]), typeof(double),
new [] { "a", "b", "c" }, 0.5d
});
Assert.Equal(6, result);
}
public async Task Overload_object_array_covariant_arg()
{
var invoker = new GenericMethodInvoker(typeof(IDummyGrain), "Method", 1);
var mock = new FooGrain();
var result = await invoker.Invoke(mock, new object[]
{
typeof(bool),
typeof(string[]),
new [] { "a", "b", "c" }
});
Assert.Equal(5, result);
}
public async Task Overload_Int()
{
var invoker = new GenericMethodInvoker(typeof(IDummyGrain), "Method", 1);
var mock = new FooGrain();
// callsite: mock.Method<bool>(42);
var result = await invoker.Invoke(mock, new object[]
{
typeof(bool), // type parameter(s)
typeof(int), // argument type(s)
42 // argument(s)
});
Assert.Equal(1, result);
}