private string BindConstantNode(ConstantNode constantNode)
{
if (constantNode.Value is string && !_nonApplyString)
{
return(String.Format("N'{0}'", constantNode.Value));
}
if (constantNode.Value == null)
{
return(" Null ");
}
if (constantNode.Value is Boolean)
{
return(Convert.ToInt32(constantNode.Value).ToString());
}
return(constantNode.Value.ToString());
}
/// <summary>
/// Validate the arguments to either isof or cast
/// </summary>
/// <param name="state">the current state of the binding algorithm</param>
/// <param name="isCast">flag to indicate which function we're validating</param>
/// <param name="args">the list of arguments, which could be changed</param>
/// <returns>the return type of the function.</returns>
private static IEdmTypeReference ValidateIsOfOrCast(BindingState state, bool isCast, ref List <QueryNode> args)
{
if (args.Count != 1 && args.Count != 2)
{
throw new ODataErrorException(
ODataErrorStrings.MetadataBinder_CastOrIsOfExpressionWithWrongNumberOfOperands(args.Count));
}
ConstantNode typeArgument = args.Last() as ConstantNode;
IEdmTypeReference returnType = null;
if (typeArgument != null)
{
returnType = TryGetTypeReference(state.Model, typeArgument.Value as string, state.Configuration.Resolver);
}
if (returnType == null)
{
throw new ODataException(ODataErrorStrings.MetadataBinder_CastOrIsOfFunctionWithoutATypeArgument);
}
if (returnType.IsCollection())
{
throw new ODataException(ODataErrorStrings.MetadataBinder_CastOrIsOfCollectionsNotSupported);
}
// if we only have one argument, then add the implicit range variable as the first argument.
if (args.Count == 1)
{
args = new List <QueryNode>()
{
new ResourceRangeVariableReferenceNode(
state.ImplicitRangeVariable.Name,
state.ImplicitRangeVariable as ResourceRangeVariable),
args[0]
};
}
else if (!(args[0] is SingleValueNode))
{
throw new ODataException(ODataErrorStrings.MetadataBinder_CastOrIsOfCollectionsNotSupported);
}
if (isCast && (args.Count == 2))
{
// throw if cast enum to not-string :
if ((args[0].GetEdmTypeReference() is IEdmEnumTypeReference) &&
!string.Equals(typeArgument.Value as string, Microsoft.OData.Metadata.EdmConstants.EdmStringTypeName, StringComparison.Ordinal))
{
throw new ODataException(ODataErrorStrings.CastBinder_EnumOnlyCastToOrFromString);
}
// throw if cast not-string to enum :
while (returnType is IEdmEnumTypeReference)
{
IEdmTypeReference edmTypeReference = args[0].GetEdmTypeReference();
if (edmTypeReference == null)
{
// Support cast null to enum
break;
}
IEdmPrimitiveTypeReference referenceTmp = edmTypeReference as IEdmPrimitiveTypeReference;
if (referenceTmp != null)
{
IEdmPrimitiveType typeTmp = referenceTmp.Definition as IEdmPrimitiveType;
if ((typeTmp != null) && (typeTmp.PrimitiveKind == EdmPrimitiveTypeKind.String))
{
break;
}
}
throw new ODataException(ODataErrorStrings.CastBinder_EnumOnlyCastToOrFromString);
}
}
if (isCast)
{
return(returnType);
}
else
{
return(EdmCoreModel.Instance.GetBoolean(true));
}
}
/// <summary>
/// If the source node is not of the specified type, then we check if type promotion is possible and inject a convert node.
/// If the source node is the same type as the target type (or if the target type is null), we just return the source node as is.
/// </summary>
/// <param name="source">The source node to apply the conversion to.</param>
/// <param name="targetTypeReference">The target primitive type. May be null - this method will do nothing in that case.</param>
/// <returns>The converted query node, or the original source node unchanged.</returns>
internal static SingleValueNode ConvertToTypeIfNeeded(SingleValueNode source, IEdmTypeReference targetTypeReference)
{
Debug.Assert(source != null, "source != null");
if (targetTypeReference == null)
{
return(source);
}
if (source.TypeReference != null)
{
if (source.TypeReference.IsEquivalentTo(targetTypeReference))
{
// For source is type definition, if source's underlying type == target type.
// We create a conversion node from source to its underlying type (target type)
// so that the service can convert value of source clr type to underlying clr type.
if (source.TypeReference.IsTypeDefinition())
{
return(new ConvertNode(source, targetTypeReference));
}
return(source);
}
// Structured type in url will be translated into a node with raw string value.
// We create a conversion node from string to structured type.
if (targetTypeReference.IsStructured() || targetTypeReference.IsStructuredCollectionType())
{
return(new ConvertNode(source, targetTypeReference));
}
if (!TypePromotionUtils.CanConvertTo(source, source.TypeReference, targetTypeReference))
{
throw new ODataException(ODataErrorStrings.MetadataBinder_CannotConvertToType(source.TypeReference.FullName(), targetTypeReference.FullName()));
}
else
{
ConstantNode constantNode = source as ConstantNode;
if (source.TypeReference.IsEnum() && constantNode != null)
{
return(new ConstantNode(constantNode.Value, ODataUriUtils.ConvertToUriLiteral(constantNode.Value, ODataVersion.V4), targetTypeReference));
}
object originalPrimitiveValue;
if (MetadataUtilsCommon.TryGetConstantNodePrimitiveLDMF(source, out originalPrimitiveValue) && (originalPrimitiveValue != null))
{
// L F D M types : directly create a ConvertNode.
// 1. NodeToExpressionTranslator.cs won't allow implicitly converting single/double to decimal, which should be done here at Node tree level.
// 2. And prevent losing precision in float -> double, e.g. (double)1.234f => 1.2339999675750732d not 1.234d
object targetPrimitiveValue = ODataUriConversionUtils.CoerceNumericType(originalPrimitiveValue, targetTypeReference.AsPrimitive().Definition as IEdmPrimitiveType);
if (string.IsNullOrEmpty(constantNode.LiteralText))
{
return(new ConstantNode(targetPrimitiveValue));
}
var candidate = new ConstantNode(targetPrimitiveValue, constantNode.LiteralText);
var decimalType = candidate.TypeReference as IEdmDecimalTypeReference;
if (decimalType != null)
{
var targetDecimalType = (IEdmDecimalTypeReference)targetTypeReference;
return(decimalType.Precision == targetDecimalType.Precision &&
decimalType.Scale == targetDecimalType.Scale ?
(SingleValueNode)candidate :
(SingleValueNode)(new ConvertNode(candidate, targetTypeReference)));
}
else
{
return(candidate);
}
}
else
{
// other type conversion : ConvertNode
return(new ConvertNode(source, targetTypeReference));
}
}
}
else
{
// If the source doesn't have a type (possibly an open property), then it's possible to convert it
// cause we don't know for sure.
return(new ConvertNode(source, targetTypeReference));
}
}