1 files changed, 76 insertions, 0 deletions
diff --git a/3rdparty/clucene/src/CLucene/store/TransactionalRAMDirectory.h b/3rdparty/clucene/src/CLucene/store/TransactionalRAMDirectory.h
new file mode 100644
index 000000000..44c5e8e99
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+++ b/3rdparty/clucene/src/CLucene/store/TransactionalRAMDirectory.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
+ *
+ * Distributable under the terms of either the Apache License (Version 2.0) or 
+ * the GNU Lesser General Public License, as specified in the COPYING file.
+ *
+ * Changes are Copyright(C) 2007, 2008 by Nokia Corporation and/or its subsidiary(-ies), all rights reserved.
+*/
+#ifndef _lucene_store_TransactionalRAMDirectory_
+#define _lucene_store_TransactionalRAMDirectory_
+
+#if defined(_LUCENE_PRAGMA_ONCE)
+#   pragma once
+#endif
+
+#include <QtCore/QString>
+
+#include "RAMDirectory.h"
+#include "CLucene/util/VoidList.h"
+
+CL_NS_DEF(store)
+
+/***
+This transactional in-memory Directory was created to address a specific
+situation, and was deliberately pared down to the simplest viable
+implementation.  For the sake of simplicity, this implementation imposes
+restrictions on what operations can be performed in the directory while a
+transaction is in progress (documented in TransactionalRAMDirectory.cpp).
+
+Because the Lucene Directory interface itself is rather simplistic, it
+would not be difficult to expand TransactionalRAMDirectory so that it
+provided fully general transactionality.  However, the developer of this
+original implementation was of the opinion that the last thing CLucene
+needs is gratuitous features that exceed their required complexity and
+haven't been rigorously tested.
+*/
+class TransactionalRAMDirectory : public RAMDirectory
+{
+private:
+    typedef CL_NS(util)::CLSet<QString, void*, CL_NS(util)::Compare::Qstring,
+        CL_NS(util)::Deletor::DummyQString> FilenameSet;
+    FilenameSet filesToRemoveOnAbort;
+
+    typedef CL_NS(util)::CLSet<QString, RAMFile*, CL_NS(util)::Compare::Qstring,
+        CL_NS(util)::Deletor::DummyQString,
+        CL_NS(util)::Deletor::Object<RAMFile> > TransFileMap;
+    TransFileMap filesToRestoreOnAbort;
+
+    bool transOpen;
+
+    void transResolved();
+    bool archiveOrigFileIfNecessary(const QString& name);
+    void unarchiveOrigFile(const QString& name);
+
+protected:
+    bool doDeleteFile(const QString& name);
+
+public:
+    TransactionalRAMDirectory();
+    virtual ~TransactionalRAMDirectory();
+
+    bool transIsOpen() const;
+    void transStart();
+    void transCommit();
+    void transAbort();
+
+    // Constrained operations:
+    void renameFile(const QString& from, const QString& to);
+    IndexOutput* createOutput(const QString& name);
+
+    void close();
+};
+
+CL_NS_END
+
+#endif