internal ODataExpression(ODataExpressionKind kind, ODataExpressionType type, Type clrType)
{
Throw.IfNull(clrType, "clrType");
Throw.If(!type.IsCompatibleWith(clrType), "clrType must be compatible with kind");
this.Kind = kind;
this.Type = type;
this.ClrType = clrType;
}
internal ODataExpression(ODataExpressionKind kind, ODataExpressionType type, Type clrType)
{
Throw.IfNull(clrType, "clrType");
Throw.If(!type.IsCompatibleWith(clrType), "clrType must be compatible with kind");
this.Kind = kind;
this.Type = type;
this.ClrType = clrType;
}
public static bool IsImplicityCastableTo(this ODataExpressionType @this, ODataExpressionType that)
{
// can't cast to null, since it's not really a type
var result = that != ODataExpressionType.Null &&
(
// null can be implicitly cast to any type
@this == ODataExpressionType.Null ||
@this.ToClrType().IsImplicitlyCastableTo(that.ToClrType())
);
return(result);
}
/// <summary>
/// Maps <see cref="ODataExpressionType"/>s to SqlServer types
/// </summary>
protected internal override string GetSqlTypeName(ODataExpressionType oDataType)
{
switch (oDataType)
{
case ODataExpressionType.Binary:
return("VARBINARY(MAX)");
case ODataExpressionType.Boolean:
return("BIT");
case ODataExpressionType.Byte:
return("TINYINT");
case ODataExpressionType.DateTime:
return("DATETIME");
case ODataExpressionType.DateTimeOffset:
return("DATETIMEOFFSET");
case ODataExpressionType.Decimal:
// basing this off NHibernate mapping referenced here
// http://stackoverflow.com/questions/3152439/what-is-a-good-mapping-of-net-decimal-to-sql-server-decimal
return("DECIMAL(19, 5)");
case ODataExpressionType.Double:
return("FLOAT");
case ODataExpressionType.Guid:
return("UNIQUEIDENTIFIER");
case ODataExpressionType.Int16:
return("SMALLINT");
case ODataExpressionType.Int32:
return("INT");
case ODataExpressionType.Int64:
return("BIGINT");
case ODataExpressionType.Single:
// based on http://stackoverflow.com/questions/546150/float-in-database-to-in-net
return("REAL");
case ODataExpressionType.String:
return("NVARCHAR(MAX)");
case ODataExpressionType.Time:
return("TIME");
default:
throw new NotSupportedException("OData type " + oDataType + " cannot be translated to SQL");
}
}
internal static bool IsCompatibleWith(this ODataExpressionType @this, Type clrType)
{
Throw.IfNull(clrType, "clrType");
if (@this == ODataExpressionType.Null)
{
return(clrType.CanBeNull()); // all nullable types are compatible with the null type
}
var mappedODataType = clrType.ToODataExpressionType();
return(mappedODataType == @this);
}
public static Type ToClrType(this ODataExpressionType @this)
{
if (@this == ODataExpressionType.Null)
{
return(null);
}
Type type;
if (ODataToClrTypes.TryGetValue(@this, out type))
{
return(type);
}
throw new ArgumentException("Expression type " + @this + " does not map to a Clr type");
}
public static bool IsNumeric(this ODataExpressionType @this)
{
switch (@this)
{
case ODataExpressionType.Byte:
case ODataExpressionType.Decimal:
case ODataExpressionType.Double:
case ODataExpressionType.Int16:
case ODataExpressionType.Int32:
case ODataExpressionType.Int64:
case ODataExpressionType.SByte:
case ODataExpressionType.Single:
return(true);
default:
return(false);
}
}
internal ODataConstantExpression(object value, ODataExpressionType type, Type clrType)
: base(ODataExpressionKind.Constant, type, clrType)
{
this.Value = value;
}
public static bool IsPrimitive(this ODataExpressionType @this)
{
return(@this >= ODataExpressionType.Binary && @this <= ODataExpressionType.DateTimeOffset);
}
/// <summary> /// Gets the database name for the given <see cref="ODataExpressionType"/>. Throws <see cref="NotSupportedException"/> /// if no database type maps to that type /// </summary> protected internal abstract string GetSqlTypeName(ODataExpressionType oDataType);
internal ODataConstantExpression(object value, ODataExpressionType type, Type clrType)
: base(ODataExpressionKind.Constant, type, clrType)
{
this.Value = value;
}
