/// <summary>Returns the widener. </summary> /// <param name="columnName">name of column</param> /// <param name="columnType">type of column</param> /// <param name="writeablePropertyType">property type</param> /// <param name="writeablePropertyName">propery name</param> /// <returns>type widender</returns> /// <throws>ExprValidationException if type validation fails</throws> public static TypeWidener GetCheckPropertyAssignType(String columnName, Type columnType, Type writeablePropertyType, String writeablePropertyName) { Type columnClassBoxed = columnType.GetBoxedType(); Type targetClassBoxed = writeablePropertyType.GetBoxedType(); if (columnType == null) { if (writeablePropertyType.IsPrimitive) { String message = "Invalid assignment of column '" + columnName + "' of null type to event property '" + writeablePropertyName + "' typed as '" + writeablePropertyType.FullName + "', nullable type mismatch"; throw new ExprValidationException(message); } } else if (columnClassBoxed != targetClassBoxed) { if (columnClassBoxed == typeof(string) && targetClassBoxed == typeof(char?)) { return(TypeWidenerStringToCharCoercer.Widen); } if (columnClassBoxed.IsArray && targetClassBoxed.IsArray) { var columnClassElement = columnClassBoxed.GetElementType(); var targetClassElement = targetClassBoxed.GetElementType(); // By definition, columnClassElement and targetClassElement should be // incompatible. Question is, can we find a coercer between them? var coercer = CoercerFactory.GetCoercer(columnClassElement, targetClassElement); return(source => WidenArray(source, targetClassElement, coercer)); } if (!columnClassBoxed.IsAssignmentCompatible(targetClassBoxed)) { var writablePropName = writeablePropertyType.FullName; if (writeablePropertyType.IsArray) { writablePropName = writeablePropertyType.GetElementType().FullName + "[]"; } var columnTypeName = columnType.FullName; if (columnType.IsArray) { columnTypeName = columnType.GetElementType().FullName + "[]"; } String message = "Invalid assignment of column '" + columnName + "' of type '" + columnTypeName + "' to event property '" + writeablePropertyName + "' typed as '" + writablePropName + "', column and parameter types mismatch"; throw new ExprValidationException(message); } if (writeablePropertyType.IsNumeric()) { var instance = new TypeWidenerBoxedNumeric( CoercerFactory.GetCoercer(columnClassBoxed, targetClassBoxed)); return(instance.Widen); } } return(null); }
/// <summary>Returns the widener. </summary> /// <param name="columnName">name of column</param> /// <param name="columnType">type of column</param> /// <param name="writeablePropertyType">property type</param> /// <param name="writeablePropertyName">propery name</param> /// <param name="allowObjectArrayToCollectionConversion">whether we widen object-array to collection</param> /// <param name="customizer">customization if any</param> /// <param name="engineURI">engine URI</param> /// <param name="statementName">statement name</param> /// <exception cref="ExprValidationException">if type validation fails</exception> /// <returns>type widender</returns> /// <throws>ExprValidationException if type validation fails</throws> public static TypeWidener GetCheckPropertyAssignType( String columnName, Type columnType, Type writeablePropertyType, String writeablePropertyName, bool allowObjectArrayToCollectionConversion, TypeWidenerCustomizer customizer, string statementName, string engineURI) { Type columnClassBoxed = TypeHelper.GetBoxedType(columnType); Type targetClassBoxed = TypeHelper.GetBoxedType(writeablePropertyType); if (customizer != null) { TypeWidener custom = customizer.WidenerFor(columnName, columnType, writeablePropertyType, writeablePropertyName, statementName, engineURI); if (custom != null) { return(custom); } } if (columnType == null) { if (writeablePropertyType.IsPrimitive) { String message = "Invalid assignment of column '" + columnName + "' of null type to event property '" + writeablePropertyName + "' typed as '" + writeablePropertyType.FullName + "', nullable type mismatch"; throw new ExprValidationException(message); } } else if (columnClassBoxed != targetClassBoxed) { if (columnClassBoxed == typeof(string) && targetClassBoxed == typeof(char?)) { return(TypeWidenerStringToCharCoercer.Widen); } if (allowObjectArrayToCollectionConversion && columnClassBoxed.IsArray && !columnClassBoxed.GetElementType().IsPrimitive && targetClassBoxed.IsGenericCollection()) { return(OBJECT_ARRAY_TO_COLLECTION_COERCER); } if (columnClassBoxed.IsGenericDictionary() && targetClassBoxed.IsGenericDictionary()) { var columnClassGenerics = columnClassBoxed.GetGenericArguments(); var targetClassGenerics = targetClassBoxed.GetGenericArguments(); var transformMethod = typeof(TransformDictionaryFactory) .GetMethod("Create", new[] { typeof(object) }) .MakeGenericMethod(targetClassGenerics[0], targetClassGenerics[1], columnClassGenerics[0], columnClassGenerics[1]); return(source => { var parameters = new object[] { source }; return transformMethod.Invoke(null, BindingFlags.Static | BindingFlags.Public, null, parameters, null); }); } if ((columnClassBoxed == typeof(string)) && (targetClassBoxed == typeof(char[]))) { return(source => { var sourceAsString = (string)source; return sourceAsString != null?sourceAsString.ToCharArray() : null; }); } if ((columnClassBoxed == typeof(char[])) && (targetClassBoxed == typeof(string))) { return(source => { var sourceAsCharArray = (char[])source; return sourceAsCharArray != null ? new string(sourceAsCharArray) : null; }); } if (columnClassBoxed.IsArray && targetClassBoxed.IsArray) { var columnClassElement = columnClassBoxed.GetElementType(); var targetClassElement = targetClassBoxed.GetElementType(); if (columnClassElement.IsAssignmentCompatible(targetClassElement)) { // By definition, columnClassElement and targetClassElement should be // incompatible. Question is, can we find a coercer between them? var coercer = CoercerFactory.GetCoercer(columnClassElement, targetClassElement); return(source => WidenArray(source, targetClassElement, coercer)); } } if (!columnClassBoxed.IsAssignmentCompatible(targetClassBoxed)) { var writablePropName = writeablePropertyType.FullName; if (writeablePropertyType.IsArray) { writablePropName = writeablePropertyType.GetElementType().FullName + "[]"; } var columnTypeName = columnType.FullName; if (columnType.IsArray) { columnTypeName = columnType.GetElementType().FullName + "[]"; } String message = "Invalid assignment of column '" + columnName + "' of type '" + columnTypeName + "' to event property '" + writeablePropertyName + "' typed as '" + writablePropName + "', column and parameter types mismatch"; throw new ExprValidationException(message); } if (writeablePropertyType.IsNumeric()) { var instance = new TypeWidenerBoxedNumeric( CoercerFactory.GetCoercer(columnClassBoxed, targetClassBoxed)); return(instance.Widen); } } return(null); }