/// <summary>
/// This method takes a type and a set of facets and returns the best mapped equivalent type
/// in Ingres, taking the store version into consideration.
/// </summary>
/// <param name="storeType">A TypeUsage encapsulating an EDM type and a set of facets</param>
/// <returns>A TypeUsage encapsulating a store type and a set of facets</returns>
public override TypeUsage GetStoreType(TypeUsage edmType)
{
if (edmType == null)
{
throw new ArgumentNullException("edmType");
}
Debug.Assert(edmType.EdmType.BuiltInTypeKind == BuiltInTypeKind.PrimitiveType);
var primitiveType = edmType.EdmType as PrimitiveType;
if (primitiveType == null)
{
throw new ArgumentException(String.Format("The underlying provider does not support the type '{0}'.", edmType));
}
ReadOnlyMetadataCollection <Facet> facets = edmType.Facets;
switch (primitiveType.PrimitiveTypeKind)
{
case PrimitiveTypeKind.Boolean:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["tinyint"]));
case PrimitiveTypeKind.SByte:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["tinyint"]));
case PrimitiveTypeKind.Byte:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["smallint"]));
case PrimitiveTypeKind.Int16:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["smallint"]));
case PrimitiveTypeKind.Int32:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["integer"]));
case PrimitiveTypeKind.Int64:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["bigint"]));
case PrimitiveTypeKind.Double:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["float"]));
case PrimitiveTypeKind.Single:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["real"]));
case PrimitiveTypeKind.Decimal: // decimal, money
return(TypeUsage.CreateDecimalTypeUsage(StoreTypeNameToStorePrimitiveType["decimal"], TypeHelpers.GetPrecision(edmType, 18), TypeHelpers.GetScale(edmType, 0)));
case PrimitiveTypeKind.Binary: // byte, byte varying, long byte
{
var isFixedLength = facets["FixedLength"].GetValue <bool>(false);
var maxLengthFacet = facets["MaxLength"];
var maxLength = maxLengthFacet.GetValue <int?>();
if (maxLengthFacet.IsUnbounded || maxLength == null || maxLength.Value > binaryMaxSize)
{
maxLength = null;
}
var storeTypeName = isFixedLength ? "byte" : maxLength == null ? "long byte" : "byte varying";
return(CreateBinaryTypeUsage(StoreTypeNameToStorePrimitiveType[storeTypeName], isFixedLength, maxLength));
}
case PrimitiveTypeKind.String: // char, nchar, varchar, nvarchar, long varchar, long nvarchar
{
var isUnicode = facets["Unicode"].GetValue <bool>(false);
var isFixedLength = facets["FixedLength"].GetValue <bool>(false);
var maxLengthFacet = facets["MaxLength"];
var maxLength = maxLengthFacet.GetValue <int?>();
if (maxLengthFacet.IsUnbounded || maxLength == null || maxLength.Value > varcharMaxSize)
{
maxLength = null;
}
var storeTypeName = isFixedLength ? "char" : "varchar";
storeTypeName = isUnicode ? "n" + storeTypeName : storeTypeName;
storeTypeName = (maxLength == null) ? "long " + storeTypeName : storeTypeName;
return(CreateStringTypeUsage(StoreTypeNameToStorePrimitiveType[storeTypeName], isUnicode, isFixedLength, maxLength));
}
case PrimitiveTypeKind.DateTime: // ingresdate
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["ingresdate"]));
case PrimitiveTypeKind.Time: // time
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["time"]));
default:
throw new NotSupportedException(String.Format("There is no store type corresponding to the EDM type '{0}' of primitive type '{1}'.", edmType, primitiveType.PrimitiveTypeKind));
}
}
/// <summary>
/// This method takes a type and a set of facets and returns the best mapped equivalent type
/// in EDM.
/// </summary>
/// <param name="storeType">A TypeUsage encapsulating a store type and a set of facets</param>
/// <returns>A TypeUsage encapsulating an EDM type and a set of facets</returns>
public override TypeUsage GetEdmType(TypeUsage storeType)
{
if (storeType == null)
{
throw new ArgumentNullException("storeType");
}
string storeTypeName = storeType.EdmType.Name.ToLowerInvariant();
if (!base.StoreTypeNameToEdmPrimitiveType.ContainsKey(storeTypeName))
{
throw new ArgumentException(String.Format("The underlying provider does not support the type '{0}'.", storeTypeName));
}
PrimitiveType edmPrimitiveType = base.StoreTypeNameToEdmPrimitiveType[storeTypeName];
switch (storeTypeName)
{
// for some types we just go with simple type usage with no facets
case "tinyint":
case "smallint":
case "integer":
case "bigint":
case "integer1":
case "integer2":
case "integer4":
case "integer8":
case "bool":
case "int1":
case "int2":
case "int4":
case "int8":
case "float":
case "float4":
case "float8":
case "double":
case "real":
return(TypeUsage.CreateDefaultTypeUsage(edmPrimitiveType));
case "decimal":
return(CreateDecimalTypeUsage(edmPrimitiveType, TypeHelpers.GetPrecision(storeType), TypeHelpers.GetScale(storeType)));
case "money":
return(TypeUsage.CreateDecimalTypeUsage(edmPrimitiveType, 14, 2));
case "varchar":
return(CreateStringTypeUsage(edmPrimitiveType, false, false, TypeHelpers.GetMaxLength(storeType)));
case "char":
return(CreateStringTypeUsage(edmPrimitiveType, false, true, TypeHelpers.GetMaxLength(storeType)));
case "nvarchar":
return(CreateStringTypeUsage(edmPrimitiveType, true, false, TypeHelpers.GetMaxLength(storeType)));
case "nchar":
return(CreateStringTypeUsage(edmPrimitiveType, true, true, TypeHelpers.GetMaxLength(storeType)));
case "long varchar":
return(CreateStringTypeUsage(edmPrimitiveType, false, false));
case "byte":
return(CreateBinaryTypeUsage(edmPrimitiveType, true, TypeHelpers.GetMaxLength(storeType)));
case "byte varying":
return(CreateBinaryTypeUsage(edmPrimitiveType, false, TypeHelpers.GetMaxLength(storeType)));
case "long byte":
return(CreateBinaryTypeUsage(edmPrimitiveType, false));
case "timestamp":
case "rowversion":
return(TypeUsage.CreateBinaryTypeUsage(edmPrimitiveType, true, 8));
case "date":
case "ingresdate":
case "ansidate":
return(TypeUsage.CreateDateTimeTypeUsage(edmPrimitiveType, null));
default:
throw new NotSupportedException(String.Format("The underlying provider does not support the type '{0}'.", storeTypeName));
}
}
