public void Resolve(DcSpace space)
{
if (!string.IsNullOrEmpty(SchemaName))
{
// 1. Resolve schema name
TypeSchema = space.GetSchema(SchemaName);
if (TypeSchema == null)
{
return; // Cannot resolve
}
// 2. Resolve table name
TypeTable = TypeSchema.GetSubTable(TypeName);
if (TypeTable == null)
{
return; // Cannot resolve
}
}
else if (!string.IsNullOrEmpty(TypeName)) // No schema name (imcomplete info)
{
// 1. try to find the table in the mashup
DcSchema mashup = space.GetSchemas().FirstOrDefault(x => x.GetSchemaKind() == DcSchemaKind.Dc);
if (mashup != null)
{
TypeTable = mashup.GetSubTable(TypeName);
if (TypeTable != null)
{
TypeSchema = mashup;
SchemaName = TypeSchema.Name; // We also reconstruct the name
return;
}
}
// 2. try to find the table in any other schema
foreach (DcSchema schema in space.GetSchemas())
{
TypeTable = schema.GetSubTable(TypeName);
if (TypeTable != null)
{
TypeSchema = schema;
SchemaName = TypeSchema.Name; // We also reconstruct the name
return;
}
}
}
}
public static object ResolveJsonRef(JObject json, DcSpace ws) // Resolve a json reference to a real object
{
if (json == null)
{
return(null);
}
string element_type = (string)json["element_type"];
if (element_type == null)
{
if (json["schema_name"] == null)
{
return(null);
}
else if (json["table_name"] == null)
{
element_type = "schema";
}
else if (json["column_name"] == null)
{
element_type = "table";
}
else
{
element_type = "column";
}
}
if (element_type == "schema") // Find schema
{
return(ws.GetSchema((string)json["schema_name"]));
}
else if (element_type == "table") // Find table
{
DcSchema schema = ws.GetSchema((string)json["schema_name"]);
if (schema == null)
{
return(null);
}
return(schema.GetSubTable((string)json["table_name"]));
}
else if (element_type == "column") // Find column
{
DcSchema schema = ws.GetSchema((string)json["schema_name"]);
if (schema == null)
{
return(null);
}
DcTable table = schema.GetSubTable((string)json["table_name"]);
if (table == null)
{
return(null);
}
return(table.GetColumn((string)json["column_name"]));
}
else
{
throw new NotImplementedException("Unknown element type in the reference.");
}
}
