// <summary>
// Handler for the using element
// </summary>
private void HandleUsingElement(XmlReader reader)
{
var referencedNamespace = new UsingElement(this);
referencedNamespace.Parse(reader);
AliasResolver.Add(referencedNamespace);
}
internal override void ResolveTopLevelNames()
{
base.ResolveTopLevelNames();
// Resolve all the referenced namespace to make sure that this namespace is valid
AliasResolver.ResolveNamespaces();
foreach (SchemaElement element in SchemaTypes)
{
element.ResolveTopLevelNames();
}
foreach (var function in Functions)
{
function.ResolveTopLevelNames();
}
}
// <summary>
// Look up a fully qualified type name reference.
// </summary>
// <param name="usingElement"> element containing the reference </param>
// <param name="typeName"> the fully qualified type name </param>
// <param name="type"> the referenced schema type </param>
// <returns> false if there was an error </returns>
internal bool ResolveTypeName(SchemaElement usingElement, string typeName, out SchemaType type)
{
DebugCheck.NotNull(usingElement);
DebugCheck.NotNull(typeName);
type = null;
// get the schema(s) that match the namespace/alias
string actualQualification;
string unqualifiedTypeName;
Utils.ExtractNamespaceAndName(typeName, out actualQualification, out unqualifiedTypeName);
var definingQualification = actualQualification;
if (definingQualification == null)
{
definingQualification = ProviderManifest == null ? _namespaceName : ProviderManifest.NamespaceName;
}
string namespaceName;
// First check if there is an alias defined by this name. For primitive type namespace, we do not need to resolve
// any alias, since that's a reserved keyword and we don't allow alias with that name
if (actualQualification == null ||
!AliasResolver.TryResolveAlias(definingQualification, out namespaceName))
{
namespaceName = definingQualification;
}
// Resolve the type name
if (!SchemaManager.TryResolveType(namespaceName, unqualifiedTypeName, out type))
{
// it must be an undefined type.
if (actualQualification == null)
{
// Every type except the primitive type must be qualified
usingElement.AddError(ErrorCode.NotInNamespace, EdmSchemaErrorSeverity.Error, Strings.NotNamespaceQualified(typeName));
}
else if (!SchemaManager.IsValidNamespaceName(namespaceName))
{
usingElement.AddError(
ErrorCode.BadNamespace, EdmSchemaErrorSeverity.Error, Strings.BadNamespaceOrAlias(actualQualification));
}
else
{
// if the type name was alias qualified
if (namespaceName != definingQualification)
{
usingElement.AddError(
ErrorCode.NotInNamespace, EdmSchemaErrorSeverity.Error,
Strings.NotInNamespaceAlias(unqualifiedTypeName, namespaceName, definingQualification));
}
else
{
usingElement.AddError(
ErrorCode.NotInNamespace, EdmSchemaErrorSeverity.Error,
Strings.NotInNamespaceNoAlias(unqualifiedTypeName, namespaceName));
}
}
return(false);
}
// For ssdl and provider manifest, make sure that the type is present in this schema or primitive schema
else if (DataModel != SchemaDataModelOption.EntityDataModel &&
type.Schema != this &&
type.Schema != SchemaManager.PrimitiveSchema)
{
Debug.Assert(type.Namespace != Namespace, "Using element is not allowed in the schema of ssdl and provider manifest");
usingElement.AddError(
ErrorCode.InvalidNamespaceOrAliasSpecified, EdmSchemaErrorSeverity.Error,
Strings.InvalidNamespaceOrAliasSpecified(actualQualification));
return(false);
}
return(true);
}
