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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Data.Metadata.Edm;
using System.IO;
using System.Linq;
using System.Text;
using System.Xml;
namespace LinqFunctionStubsGenerator
{
/// <summary>
/// Class that gets metadata about the functions and generates the function stubs.
/// </summary>
public class SampleProviderLinqFunctionStubsCodeGen
{
/// <summary>
/// Main driver function.
/// </summary>
/// <param name="args"></param>
public static void Generate(string outputFileName)
{
//The following functions are omitted because they have counterparts in the BCL
string[] omittedFunctions = new[]
{
"Sum", "Min", "Max", "Average", "Avg",
"Count", "BigCount",
"Trim", "RTrim", "LTrim",
"Concat", "Length", "Substring",
"Replace", "IndexOf", "ToUpper", "ToLower",
"Contains", "StartsWith", "EndsWith", "Year", "Month", "Day",
"DayOfYear", "Hour", "Minute", "Second", "Millisecond", "CurrentDateTime", "CurrentDateTimeOffset",
"CurrentUtcDateTime",
"BitwiseAnd", "BitwiseOr", "BitwiseXor", "BitwiseNot",
"Round", "Abs", "Power", "NewGuid",
"Floor", "Ceiling",
};
//The following functions are omitted from SqlFunctions because they already exist in EntityFunctions
string[] omittedSqlFunctions = new[]
{
"STDEV", "STDEVP", "VAR", "VARP", "COUNT_BIG",
"Left", "Right", "Reverse", "GetTotalOffsetMinutes",
"TruncateTime", "CreateDateTime",
"CreateDateTimeOffset", "CreateTime", "Add", "Diff",
"Truncate", "SYSDATETIME", "SYSUTCDATETIME", "SYSDATETIMEOFFSET",
"LEN", "LOWER", "UPPER", "NEWID",
};
//Generate Sql Server function stubs
String ssdl = @"<Schema Namespace='LinqFunctionStubsGenerator' Alias='Self' Provider='SampleEntityFrameworkProvider' ProviderManifestToken='2008' xmlns='http://schemas.microsoft.com/ado/2006/04/edm/ssdl'></Schema>";
XmlReader[] xmlReaders = new XmlReader[1];
xmlReaders[0] = XmlReader.Create(new StringReader(ssdl));
StoreItemCollection storeItemCollection = new StoreItemCollection(xmlReaders);
IEnumerable<EdmFunction> sqlFunctions = storeItemCollection.GetItems<EdmFunction>()
.Where(f => f.NamespaceName == "SqlServer")
.Where(f => !(omittedFunctions.Concat(omittedSqlFunctions)).Contains(f.Name, StringComparer.OrdinalIgnoreCase));
FunctionStubFileWriter sqlStubsFileWriter = new FunctionStubFileWriter(sqlFunctions, GetFunctionNamingDictionary(), GetParameterNamingDictionary());
sqlStubsFileWriter.GenerateToFile(outputFileName, "SampleEntityFrameworkProvider", "SampleSqlFunctions", "SqlServer", true);
}
/// <summary>
/// These help generate better function and argument names in following cases:
/// 1. Generates an fxcop agreeable name
/// 2. PasalCases two-worded identifier names.
/// </summary>
private static Dictionary<string, string> GetFunctionNamingDictionary()
{
Dictionary<string, string> sqlFunctionNames = new Dictionary<string, string>();
sqlFunctionNames.Add("CHECKSUM_AGG", "ChecksumAggregate");
sqlFunctionNames.Add("STDEV", "StandardDeviation");
sqlFunctionNames.Add("STDEVP", "StandardDeviationP");
sqlFunctionNames.Add("VARP", "VarP");
sqlFunctionNames.Add("CHARINDEX", "CharIndex");
sqlFunctionNames.Add("LTRIM", "LTrim");
sqlFunctionNames.Add("NCHAR", "NChar");
sqlFunctionNames.Add("PATINDEX", "PatIndex");
sqlFunctionNames.Add("QUOTENAME", "QuoteName");
sqlFunctionNames.Add("RTRIM", "RTrim");
sqlFunctionNames.Add("DATEADD", "DateAdd");
sqlFunctionNames.Add("DATEDIFF", "DateDiff");
sqlFunctionNames.Add("DATENAME", "DateName");
sqlFunctionNames.Add("DATEPART", "DatePart");
sqlFunctionNames.Add("GETDATE", "GetDate");
sqlFunctionNames.Add("GETUTCDATE", "GetUtcDate");
sqlFunctionNames.Add("DATALENGTH", "DataLength");
sqlFunctionNames.Add("NEWID", "NewId");
sqlFunctionNames.Add("CURRENT_TIMESTAMP", "CurrentTimestamp");
sqlFunctionNames.Add("CURRENT_USER", "CurrentUser");
sqlFunctionNames.Add("HOST_NAME", "HostName");
sqlFunctionNames.Add("USER_NAME", "UserName");
sqlFunctionNames.Add("ISNUMERIC", "IsNumeric");
sqlFunctionNames.Add("ISDATE", "IsDate");
sqlFunctionNames.Add("ATN2", "Atan2");
sqlFunctionNames.Add("SOUNDEX", "SoundCode");
sqlFunctionNames.Add("SQRT", "SquareRoot");
sqlFunctionNames.Add("STR", "StringConvert");
return sqlFunctionNames;
}
private static Dictionary<string, string> GetParameterNamingDictionary()
{
Dictionary<string, string> sqlFunctionParameterNames = new Dictionary<string, string>();
sqlFunctionParameterNames.Add("strSearch", "toSearch");
sqlFunctionParameterNames.Add("strTarget", "target");
sqlFunctionParameterNames.Add("datepart", "datePartArg");
sqlFunctionParameterNames.Add("enddate", "endDate");
sqlFunctionParameterNames.Add("startdate", "startDate");
sqlFunctionParameterNames.Add("decimal", "decimalArg");
sqlFunctionParameterNames.Add("str1", "string1");
sqlFunctionParameterNames.Add("str2", "string2");
sqlFunctionParameterNames.Add("str", "stringArg");
sqlFunctionParameterNames.Add("string_expression", "stringExpression");
sqlFunctionParameterNames.Add("x", "baseArg");
sqlFunctionParameterNames.Add("y", "exponentArg");
sqlFunctionParameterNames.Add("character_string", "stringArg");
sqlFunctionParameterNames.Add("quote_character", "quoteCharacter");
sqlFunctionParameterNames.Add("numeric_expression", "numericExpression");
sqlFunctionParameterNames.Add("strInput", "stringInput");
sqlFunctionParameterNames.Add("strReplacement", "stringReplacement");
sqlFunctionParameterNames.Add("strPattern", "stringPattern");
sqlFunctionParameterNames.Add("datetimeoffset", "dateTimeOffsetArg");
return sqlFunctionParameterNames;
}
public static int Main(string[] args)
{
if(args.Length != 1 || string.IsNullOrEmpty(args[0]))
{
Console.WriteLine("Usage:\nFunctionStubGenerator.exe targetPath");
return 1;
}
Generate(args[0]);
return 0;
}
}
}
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