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97 lines
2.6 KiB
97 lines
2.6 KiB
3 years ago
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//
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// DocumentDB.h
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//
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// DocumentDB: This class is the interface to the database of document
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// references. This database is only used while digging.
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// An extract of this database is used for searching.
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// This is because digging requires a different index
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// than searching.
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//
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// Part of the ht://Dig package <http://www.htdig.org/>
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// Copyright (c) 1995-2004 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: DocumentDB.h,v 1.14 2004/05/28 13:15:12 lha Exp $
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//
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#ifndef _DocumentDB_h_
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#define _DocumentDB_h_
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#include "DocumentRef.h"
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#include "List.h"
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#include "Database.h"
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#include "IntObject.h"
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/* This is where the running document counter is stored.
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The first real document number is the next. */
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#define NEXT_DOC_ID_RECORD 1
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class DocumentDB
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{
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public:
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//
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// Construction/Destruction
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//
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DocumentDB();
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~DocumentDB();
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//
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// Standard database operations
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//
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int Open(const String& filename, const String& indexfilename, const String& headname);
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int Read(const String& filename, const String& indexfilename = 0, const String& headfilename = 0);
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int Close();
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int Add(DocumentRef &);
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// These do not read in the excerpt
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DocumentRef *operator [] (int DocID);
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DocumentRef *operator [] (const String& url);
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// You must call this to read the excerpt
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int ReadExcerpt(DocumentRef &);
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int Exists(int DocID);
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int Delete(int DocID);
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//
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// The database keeps track of document ids. Here is a way to get
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// the next document id.
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//
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int NextDocID() {return nextDocID++;}
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// And here's a way to increment NextDocID after adding lots of records
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// (for example when merging databases!)
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void IncNextDocID (int next) {nextDocID += next;}
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//
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// We will need to be able to iterate over the complete database.
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//
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// This returns a list of all the URLs, as String *
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List *URLs();
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// This returns a list of all the DocIDs, as IntObject *
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List *DocIDs();
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// Dump the database out to an ASCII text file
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int DumpDB(const String& filename, int verbose = 0);
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// Read in the database from an ASCII text file
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// (created by DumpDB)
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int LoadDB(const String& filename, int verbose = 0);
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private:
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Database *dbf;
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Database *i_dbf;
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Database *h_dbf;
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int isopen;
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int isread;
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int nextDocID;
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};
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#endif
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