Clang: Add RefactoringDatabaseInitializer

We moved the creation of the tables and indices to an extra class which can
be called from other places. So you can be sure that a database is
initialized.

Change-Id: Ief5b30ced7b9011ca94367aa2578098423dcecd9
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/clangsupport/refactoringdatabaseinitializer.h

@@ -0,0 +1,93 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <createtablesqlstatementbuilder.h>
+
+#include <sqlitetransaction.h>
+#include <sqlitetable.h>
+
+namespace ClangBackEnd {
+
+template<typename DatabaseType>
+class RefactoringDatabaseInitializer
+{
+public:
+    RefactoringDatabaseInitializer(DatabaseType &database)
+        : database(database)
+    {
+        Sqlite::ImmediateTransaction<DatabaseType> transaction{database};
+
+        createSymbolsTable();
+        createLocationsTable();
+        createSourcesTable();
+
+        transaction.commit();
+    }
+
+    void createSymbolsTable()
+    {
+        Sqlite::Table table;
+        table.setUseIfNotExists(true);
+        table.setName("symbols");
+        table.addColumn("symbolId", Sqlite::ColumnType::Integer, Sqlite::Contraint::PrimaryKey);
+        const Sqlite::Column &usrColumn = table.addColumn("usr", Sqlite::ColumnType::Text);
+        table.addColumn("symbolName", Sqlite::ColumnType::Text);
+        table.addIndex({usrColumn});
+
+        table.initialize(database);
+    }
+
+    void createLocationsTable()
+    {
+        Sqlite::Table table;
+        table.setUseIfNotExists(true);
+        table.setName("locations");
+        table.addColumn("symbolId", Sqlite::ColumnType::Integer);
+        table.addColumn("line", Sqlite::ColumnType::Integer);
+        table.addColumn("column", Sqlite::ColumnType::Integer);
+        const Sqlite::Column &sourceIdColumn = table.addColumn("sourceId", Sqlite::ColumnType::Integer);
+        table.addIndex({sourceIdColumn});
+
+        table.initialize(database);
+    }
+
+    void createSourcesTable()
+    {
+        Sqlite::Table table;
+        table.setUseIfNotExists(true);
+        table.setName("sources");
+        table.addColumn("sourceId", Sqlite::ColumnType::Integer, Sqlite::Contraint::PrimaryKey);
+        table.addColumn("sourcePath", Sqlite::ColumnType::Text);
+
+        table.initialize(database);
+    }
+
+public:
+    DatabaseType &database;
+};
+
+} // namespace ClangBackEnd