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88 lines
2.0 KiB
88 lines
2.0 KiB
//
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// WordMeta.h
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//
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// NAME
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//
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// abstract class to manage and use an inverted index file.
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//
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// SYNOPSIS
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//
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// #include <mifluz.h>
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//
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// WordContext context;
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//
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// WordMeta* words = context->Meta();
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//
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// delete words;
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//
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// DESCRIPTION
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//
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// WordMeta is the <i>mifluz</i> equivalent of a database handler. Each
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// WordMeta object is bound to an inverted index file and implements the
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// operations to create it, fill it with word occurrences and search
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// for an entry matching a given criterion.
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//
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// WordMeta is an abstract class and cannot be instanciated.
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// The <b>Meta</b> method of the class WordContext will create
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// an instance using the appropriate derived class, either WordMetaOne
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// or WordMetaMulti. Refer to the corresponding manual pages for
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// more information on their specific semantic.
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//
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//
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//
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// END
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//
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// Part of the ht://Dig package <http://www.htdig.org/>
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// Copyright (c) 1999-2004 The ht://Dig Group
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// For copyright details, see the file COPYING in your distribution
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// or the GNU Library General Public License (LGPL) version 2 or later
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// <http://www.gnu.org/copyleft/lgpl.html>
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//
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// $Id: WordMeta.h,v 1.4 2004/05/28 13:15:28 lha Exp $
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//
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#ifndef _WordMeta_h_
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#define _WordMeta_h_
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#include <stdio.h>
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#include "htString.h"
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#include "WordDB.h"
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class WordContext;
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class WordLock;
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class WordMetaImp;
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//
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// Serial number range [1-2^32]
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//
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#define WORD_META_SERIAL_INVALID 0
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#define WORD_META_SERIAL_WORD 0
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#define WORD_META_SERIAL_FILE 1
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class WordMeta
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{
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public:
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WordMeta() { words = 0; db = 0; imp = 0; }
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~WordMeta();
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int Initialize(WordList* words);
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int Open();
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int Close();
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int Serial(int what, unsigned int& serial);
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int GetSerial(int what, unsigned int& serial);
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int SetSerial(int what, unsigned int serial);
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int Lock(const String& resource, WordLock*& lock);
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int Unlock(const String& resource, WordLock*& lock);
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private:
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WordList *words;
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WordDB *db;
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WordMetaImp *imp;
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};
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#endif /* _WordMeta_h_ */
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