// Initialize data provider
private void init(Stream inStream)
{
HashSet <String> algorithms = new HashSet <String>();
HashSet <String> versions = new HashSet <String>();
using (ZipArchive archive = new ZipArchive(inStream, ZipArchiveMode.Read))
{
foreach (ZipArchiveEntry entry in archive.Entries)
{
if ((entry.Name.Length == 0) || (!entry.Name.EndsWith(".json")))
{
continue;
}
if (entry.FullName.StartsWith("tables"))
{
String s = extractEntry(entry);
StagingTable table = new StagingTable();
table = Newtonsoft.Json.JsonConvert.DeserializeObject <StagingTable>(s);
if (DebugSettings.DEBUG_LOADED_TABLES)
{
Debug.WriteLine("Table: ");
Debug.WriteLine(table.GetDebugString(" "));
}
initTable(table);
algorithms.Add(table.getAlgorithm());
versions.Add(table.getVersion());
_tables[table.getId()] = table;
}
else if (entry.FullName.StartsWith("schemas"))
{
String s = extractEntry(entry);
StagingSchema schema = new StagingSchema();
schema = Newtonsoft.Json.JsonConvert.DeserializeObject <StagingSchema>(s);
if (DebugSettings.DEBUG_LOADED_SCHEMAS)
{
Debug.WriteLine("Schema: ");
Debug.WriteLine(schema.GetDebugString(" "));
}
initSchema(schema);
algorithms.Add(schema.getAlgorithm());
versions.Add(schema.getVersion());
_schemas[schema.getId()] = schema;
}
}
}
// verify that all the algorithm names and versions are consistent
if (algorithms.Count != 1)
{
throw new System.InvalidOperationException("Error initializing provider; only a single algorithm should be included in file");
}
if (versions.Count != 1)
{
throw new System.InvalidOperationException("Error initializing provider; only a single version should be included in file");
}
HashSet <String> .Enumerator enumAlg = algorithms.GetEnumerator();
HashSet <String> .Enumerator enumVer = versions.GetEnumerator();
enumAlg.MoveNext();
enumVer.MoveNext();
_algorithm = enumAlg.Current;
_version = enumVer.Current;
GenerateSchemaIds();
GenerateTableIds();
// finally, initialize any caches now that everything else has been set up
invalidateCache();
}