Clang: Add Symbol Indexing

It is a first step and now a database is generated if you start QtCreator.
Some code is now shared with the PchManager which can be improved in the
future.

Change-Id: Ic267fe7960f6c455d91832859a673ce98f269aa2
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/tools/clangrefactoringbackend/source/symbolindexing.h

@@ -0,0 +1,84 @@
+/****************************************************************************
+**
+** 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 "symbolindexinginterface.h"
+
+#include "storagesqlitestatementfactory.h"
+#include "symbolindexer.h"
+#include "symbolscollector.h"
+#include "symbolstorage.h"
+
+#include <stringcache.h>
+
+#include <sqlitedatabase.h>
+#include <sqlitereadstatement.h>
+#include <sqlitewritestatement.h>
+
+namespace ClangBackEnd {
+
+class SymbolIndexing final : public SymbolIndexingInterface
+{
+public:
+    using StatementFactory = ClangBackEnd::StorageSqliteStatementFactory<Sqlite::SqliteDatabase,
+                                                                         Sqlite::SqliteReadStatement,
+                                                                         Sqlite::SqliteWriteStatement>;
+    using Storage = ClangBackEnd::SymbolStorage<StatementFactory>;
+
+    SymbolIndexing(FilePathCache<std::mutex> &filePathCache,
+                   Utils::PathString &&databaseFilePath)
+        : m_filePathCache(filePathCache),
+          m_database(std::move(databaseFilePath))
+
+    {
+    }
+
+    SymbolIndexer &indexer()
+    {
+        return m_indexer;
+    }
+
+    Sqlite::SqliteDatabase &database()
+    {
+        return m_database;
+    }
+
+    void updateProjectParts(V2::ProjectPartContainers &&projectParts,
+                            V2::FileContainers &&generatedFiles)
+    {
+        m_indexer.updateProjectParts(std::move(projectParts), std::move(generatedFiles));
+    }
+
+private:
+    FilePathCache<std::mutex> &m_filePathCache;
+    Sqlite::SqliteDatabase m_database;
+    SymbolsCollector m_collector{m_filePathCache};
+    StatementFactory m_statementFactory{m_database};
+    Storage m_symbolStorage{m_statementFactory, m_filePathCache};
+    SymbolIndexer m_indexer{m_collector, m_symbolStorage};
+};
+
+} // namespace ClangBackEnd