Ejemplo n.º 1
0
        private static ParameterBindResult BindParameter(ParameterInfo parameter, CommandLineArguments arguments)
        {
            var expectedType = parameter.ParameterType;
            var value        = default(object);

            try
            {
                if (expectedType == typeof(CommandLineArguments))
                {
                    value = new CommandLineArguments(arguments);
                }
                else if (arguments.TryGetValue(parameter.Name, out value) || arguments.TryGetValue((parameter.Position).ToString(), out value))
                {
                    if (expectedType.IsArray)
                    {
                        var elemType = expectedType.GetElementType();
                        Debug.Assert(elemType != null, "elemType != null");

                        if (value is IList <string> )
                        {
                            var valuesStr = (IList <string>)value;
                            var values    = Array.CreateInstance(elemType, valuesStr.Count);
                            for (var i = 0; i < valuesStr.Count; i++)
                            {
                                value = valuesStr[i];                                 // used on failure in exception block
                                values.SetValue(Convert(valuesStr[i], elemType, parameter), i);
                            }
                            value = values;
                        }
                        else if (value != null)
                        {
                            var values = Array.CreateInstance(elemType, 1);
                            values.SetValue(Convert(value, elemType, parameter), 0);
                            value = values;
                        }
                        else
                        {
                            var values = Array.CreateInstance(elemType, 0);
                            value = values;
                        }
                    }
                    else if (expectedType == typeof(bool) && value == null)
                    {
                        value = true;
                    }
                    else if (value == null)
                    {
                        value = parameter.IsOptional ? parameter.DefaultValue : expectedType.GetTypeInfo().IsValueType ? TypeActivator.CreateInstance(expectedType) : null;
                    }
                    else if (expectedType.GetTypeInfo().IsEnum&& value is IList <string> )
                    {
                        var valuesStr = (IList <string>)value;
                        var values    = new object[valuesStr.Count];
                        for (var i = 0; i < valuesStr.Count; i++)
                        {
                            value     = valuesStr[i];                         // used on failure in exception block
                            values[i] = Convert(value, expectedType, parameter);
                        }

                        if (IsSigned(Enum.GetUnderlyingType(expectedType)))
                        {
                            var combinedValue = 0L;
                            foreach (var enumValue in values)
                            {
                                value          = enumValue;                        // used on failure in exception block
                                combinedValue |= (long)TypeConvert.Convert(value, typeof(long));
                            }

                            value = Enum.ToObject(expectedType, combinedValue);
                        }
                        else
                        {
                            var combinedValue = 0UL;
                            foreach (var enumValue in values)
                            {
                                value          = enumValue;                        // used on failure in exception block
                                combinedValue |= (ulong)TypeConvert.Convert(enumValue, typeof(ulong));
                            }

                            value = Enum.ToObject(expectedType, combinedValue);
                        }
                    }
                    else if (value is IList <string> && expectedType.GetTypeInfo().IsAssignableFrom(typeof(IList <string>).GetTypeInfo()) == false)
                    {
                        throw new FormatException(string.Format("Parameter has {0} values while only one is expected.", ((IList <string>)value).Count));
                    }
                    else
                    {
                        value = Convert(value, expectedType, parameter);
                    }
                }
                else if (parameter.IsOptional)
                {
                    value = parameter.DefaultValue;
                }
                else if (expectedType == typeof(bool))
                {
                    value = false;
                }
                else
                {
                    throw new InvalidOperationException("Missing parameter value.");
                }
            }
            catch (Exception bindingError)
            {
                return(new ParameterBindResult(parameter, bindingError, value));
            }

            if (value != null && value.GetType() != parameter.ParameterType)
            {
                value = TypeConvert.Convert(value, parameter.ParameterType);
            }

            return(new ParameterBindResult(parameter, null, value));
        }
Ejemplo n.º 2
0
        private static bool TryBindParameter(ParameterInfo parameter, CommandLineArguments arguments, out object value)
        {
            var expectedType = parameter.ParameterType;

            if (expectedType == typeof(CommandLineArguments))
            {
                value = new CommandLineArguments(arguments);
            }
            else if (arguments.TryGetValue(parameter.Name, out value) || arguments.TryGetValue((parameter.Position).ToString(), out value))
            {
                if (expectedType.IsArray)
                {
                    var elemType = expectedType.GetElementType();
                    Debug.Assert(elemType != null, "elemType != null");
                    if (value is string[])
                    {
                        var oldArr = value as string[];
                        var newArr = Array.CreateInstance(elemType, oldArr.Length);
                        for (var v = 0; v < oldArr.Length; v++)
                        {
                            newArr.SetValue(TypeConvert.Convert(typeof(string), elemType, oldArr[v]), v);
                        }

                        value = newArr;
                    }
                    else if (value != null)
                    {
                        var newArr = Array.CreateInstance(elemType, 1);
                        newArr.SetValue(TypeConvert.Convert(value.GetType(), elemType, value), 0);
                        value = newArr;
                    }
                    else
                    {
                        var newArr = Array.CreateInstance(elemType, 0);
                        value = newArr;
                    }
                }
                else if (expectedType == typeof(bool) && value == null)
                {
                    value = true;
                }
                else if (value == null)
                {
                    value = parameter.IsOptional ? parameter.DefaultValue : expectedType.IsValueType ? TypeActivator.CreateInstance(expectedType) : null;
                }
                else if (expectedType.IsEnum && value is string[])
                {
                    var valuesStr = (string[])value;
                    var values    = Array.ConvertAll(valuesStr, v => TypeConvert.Convert(typeof(string), expectedType, v));
                    if (IsSigned(Enum.GetUnderlyingType(expectedType)))
                    {
                        var combinedValue = 0L;
                        foreach (var v in values)
                        {
                            combinedValue |= (long)TypeConvert.Convert(expectedType, typeof(long), v);
                        }

                        value = Enum.ToObject(expectedType, combinedValue);
                    }
                    else
                    {
                        var combinedValue = 0UL;
                        foreach (var v in values)
                        {
                            combinedValue |= (ulong)TypeConvert.Convert(expectedType, typeof(ulong), v);
                        }

                        value = Enum.ToObject(expectedType, combinedValue);
                    }
                }
                else
                {
                    value = TypeConvert.Convert(value.GetType(), expectedType, value);
                }
            }
            else if (parameter.IsOptional)
            {
                value = parameter.DefaultValue;
            }
            else if (expectedType == typeof(bool))
            {
                value = false;
            }
            else
            {
                return(false);
            }

            return(true);
        }