public static Expression GetTypedBody <TContext> (Type expectedType, Func <TContext, Expression> bodyProvider, TContext context)
where TContext : BodyContextBase
{
ArgumentUtility.CheckNotNull("expectedType", expectedType);
ArgumentUtility.CheckNotNull("bodyProvider", bodyProvider);
ArgumentUtility.CheckNotNull("context", context);
var body = ProviderUtility.GetNonNullValue(bodyProvider, context, "bodyProvider");
return(ExpressionTypeUtility.EnsureCorrectType(body, expectedType));
}
private static Expression EnsureCorrectType(Expression expression, Type type, int argumentIndex, string parameterName)
{
try
{
return(ExpressionTypeUtility.EnsureCorrectType(expression, type));
}
catch (InvalidOperationException ex)
{
var message = String.Format("The argument at index {0} has an invalid type: {1}", argumentIndex, ex.Message);
throw new ArgumentException(message, parameterName, ex);
}
}
