// The provider manifest token helps to distinguish between store versions.
// We have only one backend version.
// However, use the connection passed in to determine whether
// the provider is local provider or remote provider
//
/// <summary>
/// Returns provider manifest token for a given connection.
/// </summary>
/// <param name="connection">Connection to find manifest token from.</param>
/// <returns>The provider manifest token for the specified connection.</returns>
protected override string GetDbProviderManifestToken(DbConnection connection)
{
Check.NotNull(connection, "connection");
// vamshikb: Do we need to validate the connection and connection string
// before returning the ProviderManifestToken????
// Determine the type of DbConnection
// This method should never be called at runtime, so the provider
// must be remote provider.
// Throw if it is none.
//
if (connection.GetType() == typeof(SqlCeConnection))
{
_isLocalProvider = true;
}
else if (RemoteProviderHelper.CompareObjectEqualsToType(connection, RemoteProvider.SqlCeConnection))
{
_isLocalProvider = false;
}
else
{
throw ADP1.Argument(EntityRes.GetString(EntityRes.Mapping_Provider_WrongConnectionType, "SqlCeConnection"));
}
return(SqlCeProviderManifest.Token40);
}
/// <summary>
/// Returns the provider manifest by using the specified version information.
/// </summary>
/// <returns> The provider manifest by using the specified version information. </returns>
/// <param name="versionHint"> The token information associated with the provider manifest. </param>
protected override DbProviderManifest GetDbProviderManifest(string versionHint)
{
// This method can be called at runtime or design time.
//
if (string.IsNullOrEmpty(versionHint))
{
throw ADP1.Argument(EntityRes.GetString(EntityRes.UnableToDetermineStoreVersion));
}
return(_providerManifests.GetOrAdd(_isLocalProvider, l => new SqlCeProviderManifest(l)));
}
public override TypeUsage GetStoreType(TypeUsage edmType)
{
Check.NotNull(edmType, "edmType");
Debug.Assert(edmType.EdmType.BuiltInTypeKind == BuiltInTypeKind.PrimitiveType);
var primitiveType = edmType.EdmType as PrimitiveType;
if (primitiveType == null)
{
throw ADP1.Argument(EntityRes.GetString(EntityRes.ProviderDoesNotSupportType, edmType.EdmType));
}
var facets = edmType.Facets;
switch (primitiveType.PrimitiveTypeKind)
{
case PrimitiveTypeKind.Boolean:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["bit"]));
case PrimitiveTypeKind.Byte:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["tinyint"]));
case PrimitiveTypeKind.Int16:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["smallint"]));
case PrimitiveTypeKind.Int32:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["int"]));
case PrimitiveTypeKind.Int64:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["bigint"]));
case PrimitiveTypeKind.Guid:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["uniqueidentifier"]));
case PrimitiveTypeKind.Double:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["float"]));
case PrimitiveTypeKind.Single:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["real"]));
case PrimitiveTypeKind.Decimal: // decimal, numeric, money
{
byte precision;
if (!TypeHelpers.TryGetPrecision(edmType, out precision))
{
precision = 18;
}
byte scale;
if (!TypeHelpers.TryGetScale(edmType, out scale))
{
scale = 0;
}
var tu = TypeUsage.CreateDecimalTypeUsage(StoreTypeNameToStorePrimitiveType["decimal"], precision, scale);
return(tu);
}
case PrimitiveTypeKind.Binary: // binary, varbinary, image, timestamp, rowversion
{
var isFixedLength = null != facets[ProviderManifest.FixedLengthFacetName].Value &&
(bool)facets[ProviderManifest.FixedLengthFacetName].Value;
var f = facets[ProviderManifest.MaxLengthFacetName];
var isMaxLength = Helper.IsUnboundedFacetValue(f) || null == f.Value || (int)f.Value > binaryMaxSize;
var maxLength = !isMaxLength ? (int)f.Value : Int32.MinValue;
TypeUsage tu;
if (isFixedLength)
{
tu = TypeUsage.CreateBinaryTypeUsage(
StoreTypeNameToStorePrimitiveType["binary"], true, (isMaxLength ? binaryMaxSize : maxLength));
}
else
{
if (null == f.Value)
{
tu = TypeUsage.CreateBinaryTypeUsage(StoreTypeNameToStorePrimitiveType["varbinary"], false, binaryMaxSize);
}
else if (Helper.IsUnboundedFacetValue(f) ||
edmType.EdmType.Name == "image")
{
tu = TypeUsage.CreateBinaryTypeUsage(StoreTypeNameToStorePrimitiveType["image"], false);
}
else if ((int)f.Value > binaryMaxSize)
{
throw ADP1.ColumnGreaterThanMaxLengthNotSupported(edmType.EdmType.Name, binaryMaxSize);
}
else
{
tu = TypeUsage.CreateBinaryTypeUsage(StoreTypeNameToStorePrimitiveType["varbinary"], false, maxLength);
}
}
return(tu);
}
case PrimitiveTypeKind.String:
//char, nchar, varchar, nvarchar, ntext, text, xml
{
var isFixedLength = null != facets[ProviderManifest.FixedLengthFacetName].Value &&
(bool)facets[ProviderManifest.FixedLengthFacetName].Value;
var f = facets[ProviderManifest.MaxLengthFacetName];
// maxlen is true if facet value is unbounded, the value is bigger than the limited string sizes *or* the facet
// value is null. this is needed since functions still have maxlength facet value as null
var isMaxLength = Helper.IsUnboundedFacetValue(f) || null == f.Value || (int)f.Value > (nvarcharMaxSize);
var maxLength = !isMaxLength ? (int)f.Value : Int32.MinValue;
TypeUsage tu;
if (isFixedLength)
{
tu = TypeUsage.CreateStringTypeUsage(
StoreTypeNameToStorePrimitiveType["nchar"], true, true, (isMaxLength ? nvarcharMaxSize : maxLength));
}
else
{
if (null == f.Value)
{
// if it is unknown, fallback to nvarchar[4000] instead of ntext since it has limited store semantics
tu = TypeUsage.CreateStringTypeUsage(
StoreTypeNameToStorePrimitiveType["nvarchar"], true, false, nvarcharMaxSize);
}
else if (Helper.IsUnboundedFacetValue(f) ||
edmType.EdmType.Name == "ntext")
{
tu = TypeUsage.CreateStringTypeUsage(StoreTypeNameToStorePrimitiveType["ntext"], true, false);
}
else if ((int)f.Value > nvarcharMaxSize)
{
throw ADP1.ColumnGreaterThanMaxLengthNotSupported(edmType.EdmType.Name, nvarcharMaxSize);
}
else
{
tu = TypeUsage.CreateStringTypeUsage(StoreTypeNameToStorePrimitiveType["nvarchar"], true, false, maxLength);
}
}
return(tu);
}
case PrimitiveTypeKind.DateTime:
return(TypeUsage.CreateDefaultTypeUsage(StoreTypeNameToStorePrimitiveType["datetime"]));
default:
throw ADP1.NotSupported(
EntityRes.GetString(
EntityRes.NoStoreTypeForEdmType, TypeHelpers.GetIdentity(edmType), primitiveType.PrimitiveTypeKind));
}
}
public override TypeUsage GetEdmType(TypeUsage storeType)
{
Check.NotNull(storeType, "storeType");
var storeTypeName = storeType.EdmType.Name.ToLowerInvariant();
if (!base.StoreTypeNameToEdmPrimitiveType.ContainsKey(storeTypeName))
{
throw ADP1.Argument(EntityRes.GetString(EntityRes.ProviderDoesNotSupportType, storeTypeName));
}
var edmPrimitiveType = base.StoreTypeNameToEdmPrimitiveType[storeTypeName];
var maxLength = 0;
var isFixedLen = false;
var isUnbounded = true;
PrimitiveTypeKind newPrimitiveTypeKind;
switch (storeTypeName)
{
// for some types we just go with simple type usage with no facets
case "tinyint":
case "smallint":
case "bigint":
case "bit":
case "uniqueidentifier":
case "int":
return(TypeUsage.CreateDefaultTypeUsage(edmPrimitiveType));
case "nvarchar":
newPrimitiveTypeKind = PrimitiveTypeKind.String;
isUnbounded = !TypeHelpers.TryGetMaxLength(storeType, out maxLength);
isFixedLen = false;
break;
case "nchar":
newPrimitiveTypeKind = PrimitiveTypeKind.String;
isUnbounded = !TypeHelpers.TryGetMaxLength(storeType, out maxLength);
isFixedLen = true;
break;
case "ntext":
newPrimitiveTypeKind = PrimitiveTypeKind.String;
isUnbounded = true;
isFixedLen = false;
break;
case "binary":
newPrimitiveTypeKind = PrimitiveTypeKind.Binary;
isUnbounded = !TypeHelpers.TryGetMaxLength(storeType, out maxLength);
isFixedLen = true;
break;
case "varbinary":
newPrimitiveTypeKind = PrimitiveTypeKind.Binary;
isUnbounded = !TypeHelpers.TryGetMaxLength(storeType, out maxLength);
isFixedLen = false;
break;
case "image":
newPrimitiveTypeKind = PrimitiveTypeKind.Binary;
isUnbounded = true;
isFixedLen = false;
break;
case "timestamp":
case "rowversion":
return(TypeUsage.CreateBinaryTypeUsage(edmPrimitiveType, true, 8));
case "float":
case "real":
return(TypeUsage.CreateDefaultTypeUsage(edmPrimitiveType));
case "decimal":
case "numeric":
{
byte precision;
byte scale;
if (TypeHelpers.TryGetPrecision(storeType, out precision) &&
TypeHelpers.TryGetScale(storeType, out scale))
{
return(TypeUsage.CreateDecimalTypeUsage(edmPrimitiveType, precision, scale));
}
else
{
return(TypeUsage.CreateDecimalTypeUsage(edmPrimitiveType));
}
}
case "money":
return(TypeUsage.CreateDecimalTypeUsage(edmPrimitiveType, 19, 4));
case "datetime":
return(TypeUsage.CreateDateTimeTypeUsage(edmPrimitiveType, null));
default:
throw ADP1.NotSupported(EntityRes.GetString(EntityRes.ProviderDoesNotSupportType, storeTypeName));
}
Debug.Assert(
newPrimitiveTypeKind == PrimitiveTypeKind.String || newPrimitiveTypeKind == PrimitiveTypeKind.Binary,
"at this point only string and binary types should be present");
switch (newPrimitiveTypeKind)
{
case PrimitiveTypeKind.String:
if (!isUnbounded)
{
return(TypeUsage.CreateStringTypeUsage(edmPrimitiveType, /*isUnicode*/ true, isFixedLen, maxLength));
}
else
{
return(TypeUsage.CreateStringTypeUsage(edmPrimitiveType, /*isUnicode*/ true, isFixedLen));
}
case PrimitiveTypeKind.Binary:
if (!isUnbounded)
{
return(TypeUsage.CreateBinaryTypeUsage(edmPrimitiveType, isFixedLen, maxLength));
}
else
{
return(TypeUsage.CreateBinaryTypeUsage(edmPrimitiveType, isFixedLen));
}
default:
throw ADP1.NotSupported(EntityRes.GetString(EntityRes.ProviderDoesNotSupportType, storeTypeName));
}
}