feat: driver_manager and type standards.

Author: CorvusYe

lib/dart_gdbc.dart

@@ -1,12 +1,32 @@
 library dart_gdbc;
 
+part 'src/exeception/gdbc_exception.dart';
+part 'src/exeception/connect_exception.dart';
+part 'src/exeception/query_exception.dart';
+part 'src/exeception/version_exception.dart';
+part 'src/exeception/db_feature_exception.dart';
+
+part 'src/driver_manager.dart';
 part 'src/driver.dart';
 part 'src/connection.dart';
 part 'src/statement.dart';
+
 part 'src/result_set.dart';
 part 'src/result_set_meta_data.dart';
 part 'src/parameter_meta_data.dart';
 
 part 'src/prepared_statement.dart';
 
 part 'src/data_source.dart';
+part 'src/types.dart';
+
+// types
+part 'src/types/axis_point.dart';
+part 'src/types/axis_line.dart';
+part 'src/types/axis_polygon.dart';
+part 'src/types/gdb_entity.dart';
+part 'src/types/gdb_entity_property.dart';
+part 'src/types/gdb_node.dart';
+part 'src/types/gdb_path.dart';
+part 'src/types/gdb_relationship.dart';
+part 'src/types/type.dart';

lib/src/driver.dart

@@ -1,7 +1,7 @@
 part of dart_gdbc;
 
 abstract class Driver {
-  Connection connect(String url, {Map<String, String> properties});
+  Future<Connection> connect(String url, {Map<String, dynamic> properties});
 
   bool acceptsURL(String url);
 }

lib/src/driver_manager.dart

@@ -0,0 +1,30 @@
+part of dart_gdbc;
+
+class DriverManager {
+  static const String usrKey = 'username';
+  static const String pwdKey = 'password';
+
+  static final Map<String, Driver> _drivers = {};
+
+  static void registerDriver(Driver driver, [String? driverId]) {
+    _drivers[driverId ?? driver.runtimeType.toString()] = driver;
+  }
+
+  static Future<Connection> getConnection(
+    String url, {
+    Map<String, dynamic>? properties,
+    String? username,
+    String? password,
+  }) async {
+    var driver =
+        _drivers.values.firstWhere((element) => element.acceptsURL(url));
+    properties ??= {};
+    if (username != null) {
+      properties[usrKey] ??= username;
+    }
+    if (password != null) {
+      properties[pwdKey] ??= password;
+    }
+    return await driver.connect(url, properties: properties);
+  }
+}

lib/src/exeception/connect_exception.dart

@@ -0,0 +1,6 @@
+part of dart_gdbc;
+
+class ConnectException extends GdbcException {
+  ConnectException({String? message, Error? cause})
+      : super(message: message, cause: cause);
+}

lib/src/exeception/db_feature_exception.dart

@@ -0,0 +1,8 @@
+part of dart_gdbc;
+
+/// A [GdbcException] thrown when a feature is not supported by the database.
+class DbFeatureException extends GdbcException {
+  /// Creates a [DbFeatureException] with the given [message] and [cause].
+  DbFeatureException(String message, {Error? cause})
+      : super(message: message, cause: cause);
+}

lib/src/exeception/gdbc_exception.dart

@@ -0,0 +1,25 @@
+part of dart_gdbc;
+
+class GdbcException implements Error {
+  final String? message;
+
+  final Error? cause;
+
+  GdbcException({this.message, this.cause});
+
+  @override
+  StackTrace? get stackTrace => cause?.stackTrace;
+
+  @override
+  String toString() {
+    var buffer = StringBuffer();
+    buffer.write('GdbcException');
+    if (message != null) {
+      buffer.write(': $message');
+    }
+    if (cause != null) {
+      buffer.write('\nCause: $cause');
+    }
+    return buffer.toString();
+  }
+}

lib/src/exeception/query_exception.dart

@@ -0,0 +1,6 @@
+part of dart_gdbc;
+
+class GdbcQueryException extends GdbcException {
+  GdbcQueryException({String? message, Error? cause})
+      : super(message: message, cause: cause);
+}

lib/src/exeception/version_exception.dart

@@ -0,0 +1,6 @@
+part of dart_gdbc;
+
+class VersionException extends GdbcException {
+  VersionException({String? message, Error? cause})
+      : super(message: message, cause: cause);
+}

lib/src/prepared_statement.dart

@@ -1,3 +1,9 @@
 part of dart_gdbc;
 
-abstract class PreparedStatement extends Statement {}
+abstract class PreparedStatement extends Statement {
+  Future<bool> execute([String gql, Map<String, dynamic>? params]);
+
+  Future<ResultSet> executeQuery([String gql, Map<String, dynamic>? params]);
+
+  Future<int> executeUpdate(String gql, [Map<String, dynamic>? params]);
+}

lib/src/result_set.dart

@@ -1,3 +1,5 @@
 part of dart_gdbc;
 
-abstract class ResultSet {}
+abstract class ResultSet {
+  bool success = false;
+}