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/include/xapian/database.h

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00001 
00004 /* ----START-LICENCE----
00005  * Copyright 1999,2000,2001 BrightStation PLC
00006  * Copyright 2002 Ananova Ltd
00007  * Copyright 2002,2003 Olly Betts
00008  *
00009  * This program is free software; you can redistribute it and/or
00010  * modify it under the terms of the GNU General Public License as
00011  * published by the Free Software Foundation; either version 2 of the
00012  * License, or (at your option) any later version.
00013  *
00014  * This program is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017  * GNU General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU General Public License
00020  * along with this program; if not, write to the Free Software
00021  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00022  * USA
00023  * -----END-LICENCE-----
00024  */
00025 
00026 #ifndef XAPIAN_INCLUDED_DATABASE_H
00027 #define XAPIAN_INCLUDED_DATABASE_H
00028 
00029 #include <string>
00030 #include <vector>
00031 
00032 #include <xapian/base.h>
00033 #include <xapian/types.h>
00034 
00036 namespace Xapian {
00037     
00038 class Document;
00039 class PositionIterator;
00040 class PostingIterator;
00041 class TermIterator;
00042 class WritableDatabase;
00043 
00054 class Database {
00055     public:
00061         void add_database(const Database & database);
00062     
00063     public:
00064         class Internal;
00066         std::vector<Xapian::Internal::RefCntPtr<Internal> > internal;
00067 
00068     public:
00071         Database();
00072 
00075         Database(Internal *internal);
00076 
00082         virtual ~Database();
00083 
00087         Database(const Database &other);
00088 
00092         virtual void operator=(const Database &other);
00093 
00099         void reopen();
00100 
00105         virtual std::string get_description() const;
00106 
00110         PostingIterator postlist_begin(const std::string &tname) const;
00111 
00114         PostingIterator postlist_end(const std::string &tname) const;
00115 
00119         TermIterator termlist_begin(Xapian::docid did) const;
00120         
00123         TermIterator termlist_end(Xapian::docid did) const;
00124 
00128         PositionIterator positionlist_begin(Xapian::docid did, const std::string &tname) const;
00129 
00132         PositionIterator positionlist_end(Xapian::docid did, const std::string &tname) const;
00133 
00136         TermIterator allterms_begin() const;
00137 
00140         TermIterator allterms_end() const;
00141 
00143         Xapian::doccount get_doccount() const;
00144         
00146         Xapian::doclength get_avlength() const;
00147 
00149         Xapian::doccount get_termfreq(const std::string & tname) const;
00150 
00157         bool term_exists(const std::string & tname) const;
00158 
00168         Xapian::termcount get_collection_freq(const std::string & tname) const;
00169 
00172         Xapian::doclength get_doclength(Xapian::docid did) const;
00173 
00177         void keep_alive();
00178 
00191         Xapian::Document get_document(Xapian::docid did) const;
00192 };
00193 
00196 class WritableDatabase : public Database {
00197     public:
00204         virtual ~WritableDatabase();
00205 
00208         WritableDatabase();
00209 
00212         WritableDatabase(Database::Internal *internal);
00213 
00217         WritableDatabase(const WritableDatabase &other);
00218 
00226         void operator=(const WritableDatabase &other);
00227 
00269         void flush();
00270 
00293         void begin_transaction();
00294 
00321         void commit_transaction();
00322 
00341         void cancel_transaction();
00342 
00372         Xapian::docid add_document(const Xapian::Document & document);
00373 
00376         // FIXME: document more.
00377         void delete_document(Xapian::docid did);
00378 
00381         // FIXME: document more.
00382         void replace_document(Xapian::docid did, const Xapian::Document & document);
00383 
00388         std::string get_description() const;
00389 };
00390 
00391 const int DB_CREATE_OR_OPEN = 1;
00392 const int DB_CREATE = 2;
00393 const int DB_CREATE_OR_OVERWRITE = 3;
00394 const int DB_OPEN = 4;
00395 // Can't see any sensible use for this one
00396 // const int DB_OVERWRITE = XXX;
00397 
00398 /* It's mostly harmless to provide prototypes for all the backends, even
00399  * if they may not all be built in - it means the failure will be at
00400  * link time rather than when a file is built.  The main benefit is
00401  * simplicity, but this also allows us to easily split the backends into
00402  * separate libraries and link the ones we actually use in an application.
00403  */
00404 
00405 namespace Auto {
00411 Database open(const std::string &path);
00412 
00425 WritableDatabase open(const std::string &path, int action);
00426 
00434 Database open_stub(const std::string &file);
00435 
00436 }
00437 
00438 namespace Quartz {
00443 Database open(const std::string &dir);
00444 
00459 WritableDatabase
00460 open(const std::string &dir, int action, int block_size = 8192);
00461 
00462 }
00463 
00464 namespace InMemory {
00467 WritableDatabase open();
00468 }
00469 
00470 namespace Muscat36 {
00480 Database open_da(const std::string &R, const std::string &T, bool heavy_duty = true);
00481 
00492 Database open_da(const std::string &R, const std::string &T, const std::string &values, bool heavy_duty = true);
00493 
00502 Database open_db(const std::string &DB, size_t cache_size = 30);
00503 
00513 Database open_db(const std::string &DB, const std::string &values = "", size_t cache_size = 30);
00514 }
00515 
00516 namespace Remote {
00529 Database open(const std::string &program, const std::string &args,
00530         Xapian::timeout timeout = 10000);
00531 
00548 Database
00549 open(const std::string &host, unsigned int port,
00550         Xapian::timeout timeout = 10000, Xapian::timeout connect_timeout = 0);
00551 }
00552 
00553 }
00554 
00555 #endif /* XAPIAN_INCLUDED_DATABASE_H */

Documentation for Xapian (version 0.7.2).
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