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Diffstat (limited to '3rdparty/clucene/src/CLucene/store/RAMDirectory.h')
-rw-r--r-- | 3rdparty/clucene/src/CLucene/store/RAMDirectory.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/3rdparty/clucene/src/CLucene/store/RAMDirectory.h b/3rdparty/clucene/src/CLucene/store/RAMDirectory.h new file mode 100644 index 000000000..af92e30b2 --- /dev/null +++ b/3rdparty/clucene/src/CLucene/store/RAMDirectory.h @@ -0,0 +1,195 @@ +/* + * 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) 2009 Nokia Corporation and/or its subsidiary(-ies). +*/ +#ifndef _lucene_store_RAMDirectory_ +#define _lucene_store_RAMDirectory_ + +#if defined(_LUCENE_PRAGMA_ONCE) +# pragma once +#endif + +#include <QtCore/QString> +#include <QtCore/QStringList> + +#include "Lock.h" +#include "Directory.h" +#include "CLucene/util/VoidMap.h" +#include "CLucene/util/Arrays.h" + +CL_NS_DEF(store) + +class RAMFile : LUCENE_BASE +{ +public: + CL_NS(util)::CLVector<uint8_t*, CL_NS(util)::Deletor::Array<uint8_t> > buffers; + int64_t length; + uint64_t lastModified; + +#ifdef _DEBUG + QString filename; +#endif + + RAMFile(); + ~RAMFile(); +}; + +class RAMIndexOutput : public BufferedIndexOutput +{ +protected: + RAMFile* file; + int32_t pointer; + bool deleteFile; + + // output methods: + void flushBuffer(const uint8_t* src, const int32_t len); + +public: + RAMIndexOutput(RAMFile* f); + RAMIndexOutput(); + /** Construct an empty output buffer. */ + virtual ~RAMIndexOutput(); + + virtual void close(); + + // Random-at methods + virtual void seek(const int64_t pos); + int64_t length(); + /** Resets this to an empty buffer. */ + void reset(); + /** Copy the current contents of this buffer to the named output. */ + void writeTo(IndexOutput* output); +}; + +class RAMIndexInput : public BufferedIndexInput +{ +private: + RAMFile* file; + int32_t pointer; + int64_t _length; + +protected: + /** IndexInput methods */ + RAMIndexInput(const RAMIndexInput& clone); + void readInternal(uint8_t *dest, const int32_t len); + + /** Random-at methods */ + void seekInternal(const int64_t pos); + +public: + RAMIndexInput(RAMFile* f); + ~RAMIndexInput(); + IndexInput* clone() const; + + void close(); + int64_t length(); + QString getDirectoryType() const; +}; + + +/** +* A memory-resident {@link Directory} implementation. +*/ +class RAMDirectory : public Directory +{ + class RAMLock : public LuceneLock + { + private: + RAMDirectory* directory; + QString fname; + public: + RAMLock(const QString& name, RAMDirectory* dir); + virtual ~RAMLock(); + bool obtain(); + void release(); + bool isLocked(); + virtual QString toString() const; + }; + + typedef CL_NS(util)::CLHashMap<QString, RAMFile*, + CL_NS(util)::Compare::Qstring, CL_NS(util)::Equals::Qstring, + CL_NS(util)::Deletor::DummyQString, + CL_NS(util)::Deletor::Object<RAMFile> > FileMap; + +protected: + /// Removes an existing file in the directory. + virtual bool doDeleteFile(const QString& name); + + /** + * Creates a new <code>RAMDirectory</code> instance from a different + * <code>Directory</code> implementation. This can be used to load + * a disk-based index into memory. + * <P> + * This should be used only with indices that can fit into memory. + * + * @param dir a <code>Directory</code> value + * @exception IOException if an error occurs + */ + void _copyFromDir(Directory* dir, bool closeDir); + FileMap files; // unlike the java Hashtable, FileMap is not synchronized, and all access must be protected by a lock + +public: +#ifndef _CL_DISABLE_MULTITHREADING //do this so that the mutable keyword still works without mt enabled + mutable DEFINE_MUTEX(files_mutex) // mutable: const methods must also be able to synchronize properly +#endif + + // Returns a null terminated array of strings, one for each file in the directory. + QStringList list() const; + + /** Constructs an empty {@link Directory}. */ + RAMDirectory(); + + // Destructor - only call this if you are sure the directory + // is not being used anymore. Otherwise use the ref-counting + // facilities of dir->close + virtual ~RAMDirectory(); + RAMDirectory(Directory* dir); + + /** + * Creates a new <code>RAMDirectory</code> instance from the {@link FSDirectory}. + * + * @param dir a <code>String</code> specifying the full index directory path + */ + RAMDirectory(const QString& dir); + + /// Returns true iff the named file exists in this directory. + bool fileExists(const QString& name) const; + + /// Returns the time the named file was last modified. + int64_t fileModified(const QString& name) const; + + /// Returns the length in bytes of a file in the directory. + int64_t fileLength(const QString& name) const; + + /// Removes an existing file in the directory. + virtual void renameFile(const QString& from, const QString& to); + + /** Set the modified time of an existing file to now. */ + void touchFile(const QString& name); + + /// Creates a new, empty file in the directory with the given name. + /// Returns a stream writing this file. + virtual IndexOutput* createOutput(const QString& name); + + /// Construct a {@link Lock}. + /// @param name the name of the lock file + LuceneLock* makeLock(const QString& name); + + /// Returns a stream reading an existing file. + IndexInput* openInput(const QString& name); + + virtual void close(); + + QString toString() const; + + static QString DirectoryType() { return QLatin1String("RAM"); } + QString getDirectoryType() const { return DirectoryType(); } +}; + +CL_NS_END + +#endif |