예제 #1
0
        /// <summary>
        /// Gets a relative weight of how much the conversion is matching the given types.
        /// Implementation must follow that of DynValueToObjectOfType.. it's not very DRY in that sense.
        /// However here we are in perf-sensitive path.. TODO : double-check the gain and see if a DRY impl is better.
        /// </summary>
        internal static int DynValueToObjectOfTypeWeight(DynValue value, Type desiredType, bool isOptional)
        {
            if (desiredType.IsByRef)
            {
                desiredType = desiredType.GetElementType();
            }

            var customConverter = Script.GlobalOptions.CustomConverters.GetScriptToClrCustomConversion(value.Type, desiredType);

            if (customConverter != null)
            {
                return(WEIGHT_CUSTOM_CONVERTER_MATCH);
            }

            if (desiredType == typeof(DynValue))
            {
                return(WEIGHT_EXACT_MATCH);
            }

            if (desiredType == typeof(object))
            {
                return(WEIGHT_EXACT_MATCH);
            }

            StringConversions.StringSubtype stringSubType = StringConversions.GetStringSubtype(desiredType);

            Type nt           = Nullable.GetUnderlyingType(desiredType);
            Type nullableType = null;

            if (nt != null)
            {
                nullableType = desiredType;
                desiredType  = nt;
            }

            switch (value.Type)
            {
            case DataType.Void:
                if (isOptional)
                {
                    return(WEIGHT_VOID_WITH_DEFAULT);
                }
                else if (desiredType.IsValueType || (nullableType != null))
                {
                    return(WEIGHT_VOID_WITHOUT_DEFAULT);
                }
                break;

            case DataType.Nil:
                if (desiredType.IsValueType)
                {
                    if (nullableType != null)
                    {
                        return(WEIGHT_NIL_TO_NULLABLE);
                    }

                    if (isOptional)
                    {
                        return(WEIGHT_NIL_WITH_DEFAULT);
                    }
                }
                else
                {
                    return(WEIGHT_NIL_TO_REFTYPE);
                }
                break;

            case DataType.Boolean:
                if (desiredType == typeof(bool))
                {
                    return(WEIGHT_EXACT_MATCH);
                }
                if (stringSubType != StringConversions.StringSubtype.None)
                {
                    return(WEIGHT_BOOL_TO_STRING);
                }
                break;

            case DataType.Number:
                if (desiredType.IsEnum)
                {                           // number to enum conv
                    return(WEIGHT_NUMBER_TO_ENUM);
                }
                if (NumericConversions.NumericTypes.Contains(desiredType))
                {
                    return(GetNumericTypeWeight(desiredType));
                }
                if (stringSubType != StringConversions.StringSubtype.None)
                {
                    return(WEIGHT_NUMBER_TO_STRING);
                }
                break;

            case DataType.String:
                if (stringSubType == StringConversions.StringSubtype.String)
                {
                    return(WEIGHT_EXACT_MATCH);
                }
                else if (stringSubType == StringConversions.StringSubtype.StringBuilder)
                {
                    return(WEIGHT_STRING_TO_STRINGBUILDER);
                }
                else if (stringSubType == StringConversions.StringSubtype.Char)
                {
                    return(WEIGHT_STRING_TO_CHAR);
                }
                break;

            case DataType.Function:
                if (desiredType == typeof(Closure))
                {
                    return(WEIGHT_EXACT_MATCH);
                }
                else if (desiredType == typeof(ScriptFunctionDelegate))
                {
                    return(WEIGHT_EXACT_MATCH);
                }
                break;

            case DataType.ClrFunction:
                if (desiredType == typeof(CallbackFunction))
                {
                    return(WEIGHT_EXACT_MATCH);
                }
                else if (desiredType == typeof(Func <ScriptExecutionContext, CallbackArguments, DynValue>))
                {
                    return(WEIGHT_EXACT_MATCH);
                }
                break;

            case DataType.UserData:
                if (value.UserData.Object != null)
                {
                    var udObj  = value.UserData.Object;
                    var udDesc = value.UserData.Descriptor;

                    if (udDesc.IsTypeCompatible(desiredType, udObj))
                    {
                        return(WEIGHT_EXACT_MATCH);
                    }

                    if (stringSubType != StringConversions.StringSubtype.None)
                    {
                        return(WEIGHT_USERDATA_TO_STRING);
                    }
                }
                break;

            case DataType.Table:
                if (desiredType == typeof(Table) || desiredType.IsAssignableFrom(typeof(Table)))
                {
                    return(WEIGHT_EXACT_MATCH);
                }
                else if (TableConversions.CanConvertTableToType(value.Table, desiredType))
                {
                    return(WEIGHT_TABLE_CONVERSION);
                }
                break;

            case DataType.Tuple:
                break;
            }

            return(WEIGHT_NO_MATCH);
        }
예제 #2
0
        /// <summary>
        /// Converts a DynValue to a CLR object of a specific type
        /// </summary>
        internal static object DynValueToObjectOfType(DynValue value, Type desiredType, object defaultValue, bool isOptional)
        {
            if (desiredType.IsByRef)
            {
                desiredType = desiredType.GetElementType();
            }

            var converter = Script.GlobalOptions.CustomConverters.GetScriptToClrCustomConversion(value.Type, desiredType);

            if (converter != null)
            {
                var v = converter(value);
                if (v != null)
                {
                    return(v);
                }
            }

            if (desiredType == typeof(DynValue))
            {
                return(value);
            }

            if (desiredType == typeof(object))
            {
                return(DynValueToObject(value));
            }

            StringConversions.StringSubtype stringSubType = StringConversions.GetStringSubtype(desiredType);
            string str = null;

            Type nt           = Nullable.GetUnderlyingType(desiredType);
            Type nullableType = null;

            if (nt != null)
            {
                nullableType = desiredType;
                desiredType  = nt;
            }

            switch (value.Type)
            {
            case DataType.Void:
                if (isOptional)
                {
                    return(defaultValue);
                }
                else if (!desiredType.IsValueType || (nullableType != null))
                {
                    return(null);
                }
                break;

            case DataType.Nil:
                if (desiredType.IsValueType)
                {
                    if (nullableType != null)
                    {
                        return(null);
                    }

                    if (isOptional)
                    {
                        return(defaultValue);
                    }
                }
                else
                {
                    return(null);
                }
                break;

            case DataType.Boolean:
                if (desiredType == typeof(bool))
                {
                    return(value.Boolean);
                }
                if (stringSubType != StringConversions.StringSubtype.None)
                {
                    str = value.Boolean.ToString();
                }
                break;

            case DataType.Number:
                if (desiredType.IsEnum)
                {                           // number to enum conv
                    Type underType = Enum.GetUnderlyingType(desiredType);
                    return(NumericConversions.DoubleToType(underType, value.Number));
                }
                if (NumericConversions.NumericTypes.Contains(desiredType))
                {
                    object d = NumericConversions.DoubleToType(desiredType, value.Number);
                    if (d.GetType() == desiredType)
                    {
                        return(d);
                    }
                    break;
                }
                if (stringSubType != StringConversions.StringSubtype.None)
                {
                    str = value.Number.ToString();
                }
                break;

            case DataType.String:
                if (stringSubType != StringConversions.StringSubtype.None)
                {
                    str = value.String;
                }
                break;

            case DataType.Function:
                if (desiredType == typeof(Closure))
                {
                    return(value.Function);
                }
                else if (desiredType == typeof(ScriptFunctionDelegate))
                {
                    return(value.Function.GetDelegate());
                }
                break;

            case DataType.ClrFunction:
                if (desiredType == typeof(CallbackFunction))
                {
                    return(value.Callback);
                }
                else if (desiredType == typeof(Func <ScriptExecutionContext, CallbackArguments, DynValue>))
                {
                    return(value.Callback.ClrCallback);
                }
                break;

            case DataType.UserData:
                if (value.UserData.Object != null)
                {
                    var udObj  = value.UserData.Object;
                    var udDesc = value.UserData.Descriptor;

                    if (udDesc.IsTypeCompatible(desiredType, udObj))
                    {
                        return(udObj);
                    }

                    if (stringSubType != StringConversions.StringSubtype.None)
                    {
                        str = udDesc.AsString(udObj);
                    }
                }
                break;

            case DataType.Table:
                if (desiredType == typeof(Table) || desiredType.IsAssignableFrom(typeof(Table)))
                {
                    return(value.Table);
                }
                else
                {
                    object o = TableConversions.ConvertTableToType(value.Table, desiredType);
                    if (o != null)
                    {
                        return(o);
                    }
                }
                break;

            case DataType.Tuple:
                break;
            }

            if (stringSubType != StringConversions.StringSubtype.None && str != null)
            {
                return(StringConversions.ConvertString(stringSubType, str, desiredType, value.Type));
            }

            throw ScriptRuntimeException.ConvertObjectFailed(value.Type, desiredType);
        }
예제 #3
0
        //TODO use compiled lamda expresssion, which would GREATLY optimize this tree
        //the process of converting
        /// <summary>
        /// Converts a DynValue to a CLR object of a specific type
        /// </summary>
        internal static T DynValueToTypedValue <T>(DynValue value, T defaultValue, bool isOptional)
        {
            var desiredType = typeof(T);

            if (desiredType.IsByRef)
            {
                desiredType = desiredType.GetElementType();
            }

            var converter = Script.GlobalOptions.CustomConverters.GetScriptToClrCustomConversion(value.Type, typeof(T));

            if (converter != null)
            {
                var v = converter(value, desiredType);
                if (v != null)
                {
                    return((T)v);
                }
            }

            if (desiredType == typeof(DynValue))
            {
                return(ValueConverter <DynValue, T> .Instance.Convert(value));
            }

            if (desiredType == typeof(object))
            {
                return((T)DynValueToObject(value));
            }

            StringConversions.StringSubtype stringSubType = StringConversions.GetStringSubtype(desiredType);
            string str = null;

            Type nt           = Nullable.GetUnderlyingType(desiredType);
            Type nullableType = null;

            if (nt != null)
            {
                nullableType = desiredType;
                desiredType  = nt;
            }

            switch (value.Type)
            {
            case DataType.Void:
                if (isOptional)
                {
                    return(defaultValue);
                }
                else if ((!desiredType.IsValueType) || (nullableType != null))
                {
                    return(default(T));
                }
                break;

            case DataType.Nil:
                if (desiredType.IsValueType)
                {
                    if (nullableType != null)
                    {
                        return(default(T));
                    }

                    if (isOptional)
                    {
                        return(defaultValue);
                    }
                }
                else
                {
                    return(default(T));
                }
                break;

            case DataType.Boolean:
                if (desiredType == typeof(bool))
                {
                    return(ValueConverter <bool, T> .Instance.Convert(value.Boolean));
                }
                if (stringSubType != StringConversions.StringSubtype.None)
                {
                    str = value.Boolean.ToString();
                }
                break;

            case DataType.Number:
                if (desiredType.IsEnum || NumericConversions.NumericTypes.Contains(desiredType))
                {
                    return(ValueConverter <double, T> .Instance.Convert(value.Number));
                }
                if (stringSubType != StringConversions.StringSubtype.None)
                {
                    str = value.Number.ToString();
                }
                break;

            case DataType.String:
                if (stringSubType != StringConversions.StringSubtype.None)
                {
                    str = value.String;
                }
                break;

            case DataType.Function:
                if (desiredType == typeof(Closure))
                {
                    return(ValueConverter <Closure, T> .Instance.Convert(value.Function));
                }
                else if (desiredType == typeof(ScriptFunctionDelegate <T>))
                {
                    return(ValueConverter <ScriptFunctionDelegate <T>, T> .Instance.Convert(value.Function.GetDelegate <T>()));
                }
                break;

            case DataType.ClrFunction:
                if (desiredType == typeof(CallbackFunction))
                {
                    return(ValueConverter <CallbackFunction, T> .Instance.Convert(value.Callback));
                }
                else if (desiredType == typeof(Func <ScriptExecutionContext, CallbackArguments, DynValue>))
                {
                    return(ValueConverter <Func <ScriptExecutionContext, CallbackArguments, DynValue>, T> .Instance.Convert(value.Callback.ClrCallback));
                }
                break;

            case DataType.UserData:
                if (value.UserData.HasValue())
                {
                    T t;
                    if (value.UserData.TryGet(out t))
                    {
                        return(t);
                    }
                    if (stringSubType != StringConversions.StringSubtype.None)
                    {
                        str = value.UserData.AsString();
                    }
                }
                break;

            case DataType.Table:
                if (desiredType == typeof(Table) || Framework.Do.IsAssignableFrom(desiredType, typeof(Table)))
                {
                    return(ValueConverter <Table, T> .Instance.Convert(value.Table));
                }
                else
                {
                    object o = TableConversions.ConvertTableToType(value.Table, typeof(T));
                    if (o != null)
                    {
                        return(ValueConverter <object, T> .Instance.Convert(o));
                    }
                }
                break;

            case DataType.Tuple:
                break;
            }

            if (stringSubType != StringConversions.StringSubtype.None && str != null)
            {
                return(ValueConverter <object, T> .Instance.Convert(StringConversions.ConvertString(stringSubType, str, desiredType, value.Type)));
            }

            throw ScriptRuntimeException.ConvertObjectFailed(value.Type, desiredType);
        }