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# include/xapian/database.h

Go to the documentation of this file.

    00001
    00004 /* Copyright 1999,2000,2001 BrightStation PLC
    00005  * Copyright 2002 Ananova Ltd
    00006  * Copyright 2002,2003,2004,2005,2006,2007 Olly Betts
    00007  * Copyright 2006 Richard Boulton
    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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
    00022  * USA
    00023  */
    00024
    00025 #ifndef XAPIAN_INCLUDED_DATABASE_H
    00026 #define XAPIAN_INCLUDED_DATABASE_H
    00027
    00028 #include <string>
    00029 #include <vector>
    00030
    00031 #include <xapian/base.h>
    00032 #include <xapian/types.h>
    00033 #include <xapian/positioniterator.h>
    00034 #include <xapian/postingiterator.h>
    00035 #include <xapian/termiterator.h>
    00036 #include <xapian/visibility.h>
    00037
    00039 namespace Xapian {
    00040
    00041 class Document;
    00042
    00057 class XAPIAN_VISIBILITY_DEFAULT Database {
    00058     public:
    00059         class Internal;
    00061         std::vector<Xapian::Internal::RefCntPtr<Internal> > internal;
    00062
    00068         void add_database(const Database & database);
    00069
    00072         Database();
    00073
    00079         explicit Database(const std::string &path);
    00080
    00083         explicit Database(Internal *internal);
    00084
    00090         virtual ~Database();
    00091
    00095         Database(const Database &other);
    00096
    00100         void operator=(const Database &other);
    00101
    00107         void reopen();
    00108
    00113         virtual std::string get_description() const;
    00114
    00123         PostingIterator postlist_begin(const std::string &tname) const;
    00124
    00127         PostingIterator postlist_end(const std::string &) const {
    00128             return PostingIterator(NULL);
    00129         }
    00130
    00134         TermIterator termlist_begin(Xapian::docid did) const;
    00135
    00138         TermIterator termlist_end(Xapian::docid) const {
    00139             return TermIterator(NULL);
    00140         }
    00141
    00143         bool has_positions() const;
    00144
    00148         PositionIterator positionlist_begin(Xapian::docid did, const std::string &tname) const;
    00149
    00152         PositionIterator positionlist_end(Xapian::docid, const std::string &) const {
    00153             return PositionIterator(NULL);
    00154         }
    00155
    00158         TermIterator allterms_begin() const;
    00159
    00162         TermIterator allterms_end() const {
    00163             return TermIterator(NULL);
    00164         }
    00165
    00177         TermIterator allterms_begin(const std::string & prefix) const;
    00178
    00181         TermIterator allterms_end(const std::string &) const {
    00182             return TermIterator(NULL);
    00183         }
    00184
    00186         Xapian::doccount get_doccount() const;
    00187
    00189         Xapian::docid get_lastdocid() const;
    00190
    00192         Xapian::doclength get_avlength() const;
    00193
    00195         Xapian::doccount get_termfreq(const std::string & tname) const;
    00196
    00203         bool term_exists(const std::string & tname) const;
    00204
    00214         Xapian::termcount get_collection_freq(const std::string & tname) const;
    00215
    00218         Xapian::doclength get_doclength(Xapian::docid did) const;
    00219
    00223         void keep_alive();
    00224
    00237         Xapian::Document get_document(Xapian::docid did) const;
    00238
    00247         std::string get_spelling_suggestion(const std::string &word,
    00248                                             unsigned max_edit_distance = 2) const;
    00249
    00257         Xapian::TermIterator spellings_begin() const;
    00258
    00260         Xapian::TermIterator spellings_end() const {
    00261             return Xapian::TermIterator(NULL);
    00262         }
    00263
    00268         Xapian::TermIterator synonyms_begin(const std::string &term) const;
    00269
    00271         Xapian::TermIterator synonyms_end(const std::string &) const {
    00272             return Xapian::TermIterator(NULL);
    00273         }
    00274
    00280         Xapian::TermIterator synonym_keys_begin(const std::string &prefix = "") const;
    00281
    00283         Xapian::TermIterator synonym_keys_end(const std::string & = "") const {
    00284             return Xapian::TermIterator(NULL);
    00285         }
    00286
    00306         std::string get_metadata(const std::string & key) const;
    00307 };
    00308
    00311 class XAPIAN_VISIBILITY_DEFAULT WritableDatabase : public Database {
    00312     public:
    00319         virtual ~WritableDatabase();
    00320
    00323         WritableDatabase();
    00324
    00341         WritableDatabase(const std::string &path, int action);
    00342
    00345         explicit WritableDatabase(Database::Internal *internal);
    00346
    00350         WritableDatabase(const WritableDatabase &other);
    00351
    00359         void operator=(const WritableDatabase &other);
    00360
    00397         void flush();
    00398
    00438         void begin_transaction(bool flushed=true);
    00439
    00465         void commit_transaction();
    00466
    00485         void cancel_transaction();
    00486
    00515         Xapian::docid add_document(const Xapian::Document & document);
    00516
    00538         void delete_document(Xapian::docid did);
    00539
    00557         void delete_document(const std::string & unique_term);
    00558
    00590         void replace_document(Xapian::docid did,
    00591                               const Xapian::Document & document);
    00592
    00624         Xapian::docid replace_document(const std::string & unique_term,
    00625                                        const Xapian::Document & document);
    00626
    00634         void add_spelling(const std::string & word,
    00635                           Xapian::termcount freqinc = 1) const;
    00636
    00645         void remove_spelling(const std::string & word,
    00646                              Xapian::termcount freqdec = 1) const;
    00647
    00653         void add_synonym(const std::string & term,
    00654                          const std::string & synonym) const;
    00655
    00660         void remove_synonym(const std::string & term,
    00661                             const std::string & synonym) const;
    00662
    00667         void clear_synonyms(const std::string & term) const;
    00668
    00709         void set_metadata(const std::string & key, const std::string & value);
    00710
    00715         std::string get_description() const;
    00716 };
    00717
    00719 const int DB_CREATE_OR_OPEN = 1;
    00721 const int DB_CREATE = 2;
    00723 const int DB_CREATE_OR_OVERWRITE = 3;
    00725 const int DB_OPEN = 4;
    00726 // Can't see any sensible use for this one
    00727 // const int DB_OVERWRITE = XXX;
    00728
    00729 }
    00730
    00731 #endif /* XAPIAN_INCLUDED_DATABASE_H */