/// <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)
{
Debug.Assert(usingElement != null);
Debug.Assert(typeName != null);
type = null;
// get the schema(s) that match the namespace/alias
string actualQualification;
string unqualifiedTypeName;
Utils.ExtractNamespaceAndName(DataModel, typeName, out actualQualification, out unqualifiedTypeName);
string definingQualification = actualQualification;
if (definingQualification == null)
{
definingQualification = this.ProviderManifest == null ? this._namespaceName : this.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, System.Data.Entity.Strings.NotNamespaceQualified(typeName));
}
else if (!SchemaManager.IsValidNamespaceName(namespaceName))
{
usingElement.AddError(ErrorCode.BadNamespace, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.BadNamespaceOrAlias(actualQualification));
}
else
{
// if the type name was alias qualified
if (namespaceName != definingQualification)
{
usingElement.AddError(ErrorCode.NotInNamespace, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.NotInNamespaceAlias(unqualifiedTypeName, namespaceName, definingQualification));
}
else
{
usingElement.AddError(ErrorCode.NotInNamespace, EdmSchemaErrorSeverity.Error, System.Data.Entity.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 (this.DataModel != SchemaDataModelOption.EntityDataModel && type.Schema != this && type.Schema != this.SchemaManager.PrimitiveSchema)
{
Debug.Assert(type.Namespace != this.Namespace, "Using element is not allowed in the schema of ssdl and provider manifest");
usingElement.AddError(ErrorCode.InvalidNamespaceOrAliasSpecified, EdmSchemaErrorSeverity.Error, System.Data.Entity.Strings.InvalidNamespaceOrAliasSpecified(actualQualification));
return(false);
}
return(true);
}
