Renamed to DatabaseBackend to get rid of word 'Interface' in an interface name as...

[core.git] / inc / classes / interfaces / database / backend / class_DatabaseBackend.php

diff --git a/inc/classes/interfaces/database/backend/class_DatabaseBackend.php b/inc/classes/interfaces/database/backend/class_DatabaseBackend.php
new file mode 100644 (file)
index 0000000..30a2182
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+++ b/inc/classes/interfaces/database/backend/class_DatabaseBackend.php
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+<?php
+/**
+ * An interface for front-end database classes. The classes should prepare the
+ * objects for saving in the database. So for server-bases database classes SQL
+ * queries shall be generated and send to the backend classes. In case of local
+ * file databases the object shall be serialized and (maybe) transparently
+ * compressed before they got saved to a local file.
+ *
+ * @author             Roland Haeder <webmaster@shipsimu.org>
+ * @version            0.0.0
+ * @copyright  Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2013 Core Developer Team
+ * @license            GNU GPL 3.0 or any newer version
+ * @link               http://www.shipsimu.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+interface DatabaseBackend extends FrameworkDatabaseInterface {
+       /**
+        * Makes sure that the database connection is up and alive
+        *
+        * @return      void
+        */
+       function connectToDatabase ();
+
+       /**
+        * Starts a SELECT query on the database by given return type, table name
+        * and search criteria
+        *
+        * @param       $tableName              Name of the database table
+        * @param       $criteria               Search criteria class
+        * @return      $resultData             Result data of the query
+        * @throws      UnsupportedCriteriaException    If the criteria is unsupported
+        * @throws      SqlException                                    If an SQL error occurs
+        */
+       function querySelect ($tableName, LocalSearchCriteria $criteriaInstance);
+
+       /**
+        * 'Inserts' a data set instance into a local file database folder
+        *
+        * @param       $dataSetInstance        A storeable data set
+        * @return      void
+        * @throws      SqlException    If an SQL error occurs
+        */
+       function queryInsertDataSet (StoreableCriteria $dataSetInstance);
+
+       /**
+        * 'Updates' a data set instance with a database layer
+        *
+        * @param       $dataSetInstance        A storeable data set
+        * @return      void
+        * @throws      SqlException    If an SQL error occurs
+        */
+       function queryUpdateDataSet (StoreableCriteria $dataSetInstance);
+}
+
+// [EOF]
+?>