#include <database.h>
Inheritance diagram for Xapian::Database:
Public Member Functions | |
| void | add_database (const Database &database) |
| Add an existing database (or group of databases) to those accessed by this object. | |
| Database () | |
| Create a Database with no databases in. | |
| Database (const std::string &path) | |
| Open a Database, automatically determining the database backend to use. | |
| virtual | ~Database () |
| Destroy this handle on the database. | |
| Database (const Database &other) | |
| Copying is allowed. | |
| void | operator= (const Database &other) |
| Assignment is allowed. | |
| void | reopen () |
| Re-open the database. | |
| virtual std::string | get_description () const |
| Return a string describing this object. | |
| PostingIterator | postlist_begin (const std::string &tname) const |
| An iterator pointing to the start of the postlist for a given term. | |
| PostingIterator | postlist_end (const std::string &) const |
| Corresponding end iterator to postlist_begin(). | |
| TermIterator | termlist_begin (Xapian::docid did) const |
| An iterator pointing to the start of the termlist for a given document. | |
| TermIterator | termlist_end (Xapian::docid) const |
| Corresponding end iterator to termlist_begin(). | |
| bool | has_positions () const |
| Does this database have any positional information? | |
| PositionIterator | positionlist_begin (Xapian::docid did, const std::string &tname) const |
| An iterator pointing to the start of the position list for a given term in a given document. | |
| PositionIterator | positionlist_end (Xapian::docid, const std::string &) const |
| Corresponding end iterator to positionlist_begin(). | |
| TermIterator | allterms_begin () const |
| An iterator which runs across all terms in the database. | |
| TermIterator | allterms_end () const |
| Corresponding end iterator to allterms_begin(). | |
| TermIterator | allterms_begin (const std::string &prefix) const |
| An iterator which runs across all terms with a given prefix. | |
| TermIterator | allterms_end (const std::string &) const |
| Corresponding end iterator to allterms_begin(prefix). | |
| Xapian::doccount | get_doccount () const |
| Get the number of documents in the database. | |
| Xapian::docid | get_lastdocid () const |
| Get the highest document id which has been used in the database. | |
| Xapian::doclength | get_avlength () const |
| Get the average length of the documents in the database. | |
| Xapian::doccount | get_termfreq (const std::string &tname) const |
| Get the number of documents in the database indexed by a given term. | |
| bool | term_exists (const std::string &tname) const |
| Check if a given term exists in the database. | |
| Xapian::termcount | get_collection_freq (const std::string &tname) const |
| Return the total number of occurrences of the given term. | |
| Xapian::doclength | get_doclength (Xapian::docid did) const |
| Get the length of a document. | |
| void | keep_alive () |
| Send a "keep-alive" to remote databases to stop them timing out. | |
| Xapian::Document | get_document (Xapian::docid did) const |
| Get a document from the database, given its document id. | |
| std::string | get_spelling_suggestion (const std::string &word, unsigned max_edit_distance=2) const |
| Suggest a spelling correction. | |
| Xapian::TermIterator | spellings_begin () const |
| An iterator which returns all the spelling correction targets. | |
| Xapian::TermIterator | spellings_end () const |
| Corresponding end iterator to spellings_begin(). | |
| Xapian::TermIterator | synonyms_begin (const std::string &term) const |
| An iterator which returns all the synonyms for a given term. | |
| Xapian::TermIterator | synonyms_end (const std::string &) const |
| Corresponding end iterator to synonyms_begin(term). | |
| Xapian::TermIterator | synonym_keys_begin (const std::string &prefix="") const |
| An iterator which returns all terms which have synonyms. | |
| Xapian::TermIterator | synonym_keys_end (const std::string &="") const |
| Corresponding end iterator to synonym_keys_begin(prefix). | |
| std::string | get_metadata (const std::string &key) const |
| Get the user-specified metadata associated with a given key. | |
| Xapian::TermIterator | metadata_keys_begin (const std::string &prefix="") const |
| An iterator which returns all user-specified metadata keys. | |
| Xapian::TermIterator | metadata_keys_end (const std::string &="") const |
| Corresponding end iterator to metadata_keys_begin(). | |
Private Member Functions | |
| Database (Internal *internal) | |
For internal use only. Create a Database from its internals. | |
Private Attributes | |
| std::vector< Xapian::Internal::RefCntPtr< Internal > > | internal |
For internal use only. Reference counted internals. | |
Classes | |
| class | Internal |
| Base class for databases. More... | |
For searching, this class is used in conjunction with an Enquire object.
| InvalidArgumentError | will be thrown if an invalid argument is supplied, for example, an unknown database type. | |
| DatabaseOpeningError | may be thrown if the database cannot be opened (for example, a required file cannot be found). | |
| DatabaseVersionError | may be thrown if the database is in an unsupported format (for example, created by a newer version of Xapian which uses an incompatible format). |
Definition at line 57 of file database.h.
| Xapian::Database::Database | ( | ) |
Create a Database with no databases in.
Definition at line 54 of file omdatabase.cc.
References DEBUGAPICALL.
| Xapian::Database::Database | ( | const std::string & | path | ) | [explicit] |
Open a Database, automatically determining the database backend to use.
| path | directory that the database is stored in. |
| Xapian::Database::Database | ( | Internal * | internal | ) | [explicit, private] |
For internal use only.
Create a Database from its internals.
Definition at line 59 of file omdatabase.cc.
References DEBUGAPICALL.
| Xapian::Database::~Database | ( | ) | [virtual] |
Destroy this handle on the database.
If there are no copies of this object remaining, the database(s) will be closed.
Definition at line 84 of file omdatabase.cc.
References DEBUGAPICALL.
| Xapian::Database::Database | ( | const Database & | other | ) |
Copying is allowed.
The internals are reference counted, so copying is cheap.
Definition at line 66 of file omdatabase.cc.
References DEBUGAPICALL, and internal.
| void Xapian::Database::add_database | ( | const Database & | database | ) |
Add an existing database (or group of databases) to those accessed by this object.
| database | the database(s) to add. |
Definition at line 100 of file omdatabase.cc.
References DEBUGAPICALL, DEBUGLINE, and internal.
Referenced by DEFINE_TESTCASE(), main(), Xapian::open_stub(), RemoteServer::RemoteServer(), and test_qp_spell2().
| void Xapian::Database::operator= | ( | const Database & | other | ) |
Assignment is allowed.
The internals are reference counted, so assignment is cheap.
Definition at line 73 of file omdatabase.cc.
References DEBUGAPICALL, DEBUGLINE, and internal.
Referenced by Xapian::WritableDatabase::operator=().
| void Xapian::Database::reopen | ( | ) |
Re-open the database.
This re-opens the database(s) to the latest available version(s). It can be used either to make sure the latest results are returned, or to recover from a Xapian::DatabaseModifiedError.
Definition at line 90 of file omdatabase.cc.
References DEBUGAPICALL.
Referenced by DEFINE_TESTCASE().
| string Xapian::Database::get_description | ( | ) | const [virtual] |
Return a string describing this object.
Reimplemented in Xapian::WritableDatabase.
Definition at line 343 of file omdatabase.cc.
Referenced by Xapian::Enquire::Internal::get_description().
| PostingIterator Xapian::Database::postlist_begin | ( | const std::string & | tname | ) | const |
An iterator pointing to the start of the postlist for a given term.
If the term name is the empty string, the iterator returned will list all the documents in the database. Such an iterator will always return a WDF value of 1, since there is no obvious meaning for this quantity in this case.
Referenced by DEFINE_TESTCASE(), and main().
| PostingIterator Xapian::Database::postlist_end | ( | const std::string & | ) | const [inline] |
Corresponding end iterator to postlist_begin().
Definition at line 124 of file database.h.
Referenced by DEFINE_TESTCASE(), and main().
| TermIterator Xapian::Database::termlist_begin | ( | Xapian::docid | did | ) | const |
An iterator pointing to the start of the termlist for a given document.
Definition at line 148 of file omdatabase.cc.
References Assert, DEBUGAPICALL, and RETURN.
Referenced by RSetI::calculate_stats(), DEFINE_TESTCASE(), Xapian::Enquire::Internal::get_matching_terms(), MultiMatch::get_mset(), show_termlists(), and test_termlist3_helper().
| TermIterator Xapian::Database::termlist_end | ( | Xapian::docid | ) | const [inline] |
Corresponding end iterator to termlist_begin().
Definition at line 135 of file database.h.
Referenced by RSetI::calculate_stats(), DEFINE_TESTCASE(), Xapian::Enquire::Internal::get_matching_terms(), MultiMatch::get_mset(), and show_termlists().
| bool Xapian::Database::has_positions | ( | ) | const |
Does this database have any positional information?
Definition at line 188 of file omdatabase.cc.
References DEBUGAPICALL, and RETURN.
Referenced by DEFINE_TESTCASE(), and RemoteServer::RemoteServer().
| PositionIterator Xapian::Database::positionlist_begin | ( | Xapian::docid | did, | |
| const std::string & | tname | |||
| ) | const |
An iterator pointing to the start of the position list for a given term in a given document.
Referenced by DEFINE_TESTCASE(), test_emptyterm1_helper(), and test_emptyterm2_helper().
| PositionIterator Xapian::Database::positionlist_end | ( | Xapian::docid | , | |
| const std::string & | ||||
| ) | const [inline] |
Corresponding end iterator to positionlist_begin().
Definition at line 149 of file database.h.
Referenced by DEFINE_TESTCASE().
| TermIterator Xapian::Database::allterms_begin | ( | ) | const |
An iterator which runs across all terms in the database.
Definition at line 170 of file omdatabase.cc.
Referenced by Term::as_partial_query(), Term::as_wildcarded_query(), DEFINE_TESTCASE(), and show_db_stats().
| TermIterator Xapian::Database::allterms_end | ( | ) | const [inline] |
Corresponding end iterator to allterms_begin().
Definition at line 159 of file database.h.
Referenced by Term::as_partial_query(), Term::as_wildcarded_query(), DEFINE_TESTCASE(), and show_db_stats().
| TermIterator Xapian::Database::allterms_begin | ( | const std::string & | prefix | ) | const |
An iterator which runs across all terms with a given prefix.
This is functionally similar to getting an iterator with allterms_begin() and then calling skip_to(prefix) on that iterator to move to the start of the prefix, but is more convenient (because it detects the end of the prefixed terms), and may be more efficient than simply calling skip_to() after opening the iterator, particularly for network databases.
| prefix | The prefix to restrict the returned terms to. |
Definition at line 176 of file omdatabase.cc.
References DEBUGAPICALL, RETURN, and size.
| TermIterator Xapian::Database::allterms_end | ( | const std::string & | ) | const [inline] |
| Xapian::doccount Xapian::Database::get_doccount | ( | ) | const |
Get the number of documents in the database.
Definition at line 217 of file omdatabase.cc.
References DEBUGAPICALL, and RETURN.
Referenced by DEFINE_TESTCASE(), Xapian::Internal::ExpandWeight::get_weight(), main(), MultiTermList::MultiTermList(), RemoteServer::RemoteServer(), show_db_stats(), test_emptyterm1_helper(), and test_emptyterm2_helper().
| Xapian::docid Xapian::Database::get_lastdocid | ( | ) | const |
Get the highest document id which has been used in the database.
Definition at line 229 of file omdatabase.cc.
References Assert, DEBUGAPICALL, and RETURN.
Referenced by DEFINE_TESTCASE(), main(), and RemoteServer::RemoteServer().
| Xapian::doclength Xapian::Database::get_avlength | ( | ) | const |
Get the average length of the documents in the database.
Definition at line 244 of file omdatabase.cc.
References DEBUGAPICALL, DEBUGLINE, RETURN, and size.
Referenced by DEFINE_TESTCASE(), Xapian::Internal::ExpandWeight::get_weight(), RemoteServer::RemoteServer(), and show_db_stats().
| Xapian::doccount Xapian::Database::get_termfreq | ( | const std::string & | tname | ) | const |
Get the number of documents in the database indexed by a given term.
Referenced by DEFINE_TESTCASE(), Xapian::Internal::ExpandWeight::get_weight(), test_emptyterm1_helper(), and test_emptyterm2_helper().
| bool Xapian::Database::term_exists | ( | const std::string & | tname | ) | const |
Check if a given term exists in the database.
Return true if and only if the term exists in the database. This is the same as (get_termfreq(tname) != 0), but will often be more efficient.
Referenced by DEFINE_TESTCASE(), Xapian::QueryParser::Internal::parse_term(), test_emptyterm1_helper(), and test_emptyterm2_helper().
| Xapian::termcount Xapian::Database::get_collection_freq | ( | const std::string & | tname | ) | const |
Return the total number of occurrences of the given term.
This is the sum of the number of occurrences of the term in each document it indexes: i.e., the sum of the within document frequencies of the term.
| tname | The term whose collection frequency is being requested. |
Referenced by DEFINE_TESTCASE(), test_emptyterm1_helper(), and test_emptyterm2_helper().
| Xapian::doclength Xapian::Database::get_doclength | ( | Xapian::docid | did | ) | const |
Get the length of a document.
Definition at line 292 of file omdatabase.cc.
References Assert, DEBUGAPICALL, and RETURN.
Referenced by DEFINE_TESTCASE(), and MultiPostList::get_doclength().
| void Xapian::Database::keep_alive | ( | ) |
Send a "keep-alive" to remote databases to stop them timing out.
Definition at line 333 of file omdatabase.cc.
References DEBUGAPICALL.
Referenced by DEFINE_TESTCASE().
| Document Xapian::Database::get_document | ( | Xapian::docid | did | ) | const |
Get a document from the database, given its document id.
This method returns a Xapian::Document object which provides the information about a document.
| did | The document id for which to retrieve the data. |
| Xapian::DocNotFoundError | The document specified could not be found in the database. |
Definition at line 305 of file omdatabase.cc.
References Assert, DEBUGAPICALL, and RETURN.
Referenced by DEFINE_TESTCASE(), main(), show_docdata(), and show_values().
| std::string Xapian::Database::get_spelling_suggestion | ( | const std::string & | word, | |
| unsigned | max_edit_distance = 2 | |||
| ) | const |
Suggest a spelling correction.
| word | The potentially misspelled word. | |
| max_edit_distance | Only consider words which are at most max_edit_distance edits from word. An edit is a character insertion, deletion, or the transposition of two adjacent characters (default is 2). |
Referenced by DEFINE_TESTCASE(), and test_tg_spell1().
| TermIterator Xapian::Database::spellings_begin | ( | ) | const |
An iterator which returns all the spelling correction targets.
This returns all the words which are considered as targets for the spelling correction algorithm. The frequency of each word is available as the term frequency of each entry in the returned iterator.
Definition at line 488 of file omdatabase.cc.
References DEBUGAPICALL, AutoPtr< _Tp >::get(), AutoPtr< _Tp >::release(), and RETURN.
Referenced by DEFINE_TESTCASE(), and main().
| Xapian::TermIterator Xapian::Database::spellings_end | ( | ) | const [inline] |
Corresponding end iterator to spellings_begin().
Definition at line 257 of file database.h.
Referenced by DEFINE_TESTCASE(), and main().
| TermIterator Xapian::Database::synonyms_begin | ( | const std::string & | term | ) | const |
An iterator which returns all the synonyms for a given term.
| term | The term to return synonyms for. |
Definition at line 506 of file omdatabase.cc.
References DEBUGAPICALL, AutoPtr< _Tp >::get(), AutoPtr< _Tp >::release(), and RETURN.
Referenced by TermGroup::as_group(), DEFINE_TESTCASE(), Term::get_query_with_synonyms(), and main().
| Xapian::TermIterator Xapian::Database::synonyms_end | ( | const std::string & | ) | const [inline] |
Corresponding end iterator to synonyms_begin(term).
Definition at line 268 of file database.h.
Referenced by TermGroup::as_group(), DEFINE_TESTCASE(), Term::get_query_with_synonyms(), and main().
| TermIterator Xapian::Database::synonym_keys_begin | ( | const std::string & | prefix = "" |
) | const |
An iterator which returns all terms which have synonyms.
| prefix | If non-empty, only terms with this prefix are returned. |
Definition at line 524 of file omdatabase.cc.
References DEBUGAPICALL, AutoPtr< _Tp >::get(), AutoPtr< _Tp >::release(), and RETURN.
Referenced by TermGroup::as_group(), DEFINE_TESTCASE(), and main().
| Xapian::TermIterator Xapian::Database::synonym_keys_end | ( | const std::string & | = "" |
) | const [inline] |
Corresponding end iterator to synonym_keys_begin(prefix).
Definition at line 280 of file database.h.
Referenced by TermGroup::as_group(), DEFINE_TESTCASE(), and main().
| std::string Xapian::Database::get_metadata | ( | const std::string & | key | ) | const |
Get the user-specified metadata associated with a given key.
User-specified metadata allows you to store arbitrary information in the form of (key,tag) pairs. See WritableDatabase::set_metadata() for more information.
When invoked on a Xapian::Database object representing multiple databases, currently only the metadata for the first is considered but this behaviour may change in the future.
If there is no piece of metadata associated with the specified key, an empty string is returned (this applies even for backends which don't support metadata).
Empty keys are not valid, and specifying one will cause an exception.
| key | The key of the metadata item to access. |
| Xapian::InvalidArgumentError | will be thrown if the key supplied is empty. | |
| Xapian::UnimplementedError | will be thrown if the database backend in use doesn't support user-specified metadata. |
Referenced by DEFINE_TESTCASE(), and main().
| Xapian::TermIterator Xapian::Database::metadata_keys_begin | ( | const std::string & | prefix = "" |
) | const |
An iterator which returns all user-specified metadata keys.
When invoked on a Xapian::Database object representing multiple databases, currently only the metadata for the first is considered but this behaviour may change in the future.
| prefix | If non-empty, only keys with this prefix are returned. |
Definition at line 551 of file omdatabase.cc.
References DEBUGAPICALL, and RETURN.
Referenced by main().
| Xapian::TermIterator Xapian::Database::metadata_keys_end | ( | const std::string & | = "" |
) | const [inline] |
Corresponding end iterator to metadata_keys_begin().
Definition at line 326 of file database.h.
Referenced by main().
std::vector<Xapian::Internal::RefCntPtr<Internal> > Xapian::Database::internal [private] |
For internal use only.
Reference counted internals.
Definition at line 59 of file database.h.
Referenced by add_database(), OmExpand::build_tree(), Database(), MultiMatch::get_collapse_key(), MultiMatch::get_mset(), Xapian::Enquire::Internal::Internal(), MultiMatch::MultiMatch(), MultiTermList::MultiTermList(), operator=(), Xapian::Enquire::Internal::read_doc(), and Xapian::Enquire::Internal::request_doc().