PostList in a honey database with positions. More...
#include <honey_postlist.h>
Inheritance diagram for HoneyPosPostList:
Collaboration diagram for HoneyPosPostList:
Public Member Functions | |
| HoneyPosPostList (const HoneyDatabase *db_, std::string_view term_, HoneyCursor *cursor_) | |
| PositionList * | read_position_list () |
| Read the position list for the term in the current document and return a pointer to it (owned by the PostList). More... | |
| std::string | get_description () const |
| Return a string description of this object. More... | |
| Public Member Functions inherited from HoneyPostList | |
| HoneyPostList (const HoneyDatabase *db_, std::string_view term_, HoneyCursor *cursor_) | |
| Create HoneyPostList from already positioned cursor_. More... | |
| ~HoneyPostList () | |
| bool | open_nearby_postlist (std::string_view term_, bool need_read_pos, LeafPostList *&pl) const |
| Open another postlist from the same database. More... | |
| Xapian::docid | get_docid () const |
| Return the current docid. More... | |
| Xapian::termcount | get_wdf () const |
| Return the wdf for the document at the current position. More... | |
| bool | at_end () const |
| Return true if the current position is past the last entry in this list. More... | |
| PositionList * | open_position_list () const |
| Read the position list for the term in the current document and return a pointer to it (not owned by the PostList). More... | |
| PostList * | next (double w_min) |
| Advance the current position to the next document in the postlist. More... | |
| PostList * | skip_to (Xapian::docid did, double w_min) |
| Skip forward to the specified docid. More... | |
| Xapian::termcount | get_wdf_upper_bound () const |
| void | get_docid_range (Xapian::docid &first, Xapian::docid &last) const |
| Get the bounds on the range of docids this PostList can return. More... | |
| Public Member Functions inherited from LeafPostList | |
| ~LeafPostList () | |
| Xapian::termcount | get_collfreq () const |
| Get the collection frequency of the term. More... | |
| void | set_termweight (const Xapian::Weight *weight_) |
| Set the weighting scheme to use during matching. More... | |
| double | resolve_lazy_termweight (Xapian::Weight *weight_, Xapian::Weight::Internal *stats, Xapian::termcount qlen, Xapian::termcount wqf, double factor, const Xapian::Database::Internal *shard) |
| double | get_weight (Xapian::termcount doclen, Xapian::termcount unique_terms, Xapian::termcount wdfdocmax) const |
| Return the weight contribution for the current position. More... | |
| double | recalc_maxweight () |
| Recalculate the upper bound on what get_weight() can return. More... | |
| Xapian::termcount | count_matching_subqs () const |
| Count the number of leaf subqueries which match at the current position. More... | |
| void | gather_position_lists (OrPositionList *orposlist) |
| Gather PositionList* objects for a subtree. More... | |
| const std::string & | get_term () const |
| Get the term name. More... | |
| void | set_term (std::string_view term_) |
| Set the term name. More... | |
| Public Member Functions inherited from Xapian::Internal::PostList | |
| virtual | ~PostList () |
| We have virtual methods and want to be able to delete derived classes using a pointer to the base class, so we need a virtual destructor. More... | |
| Xapian::doccount | get_termfreq () const |
| Get an estimate of the number of documents this PostList will return. More... | |
| virtual PostList * | check (Xapian::docid did, double w_min, bool &valid) |
| Check if the specified docid occurs in this postlist. More... | |
| PostList * | next () |
| Advance the current position to the next document in the postlist. More... | |
| PostList * | skip_to (Xapian::docid did) |
| Skip forward to the specified docid. More... | |
Private Attributes | |
| HoneyRePositionList | position_list |
| PositionList object to reuse for OP_NEAR and OP_PHRASE. More... | |
Additional Inherited Members | |
| Protected Member Functions inherited from LeafPostList | |
| LeafPostList (std::string_view term_) | |
| Only constructable as a base class for derived classes. More... | |
| Protected Member Functions inherited from Xapian::Internal::PostList | |
| PostList () | |
| Only constructable as a base class for derived classes. More... | |
| Protected Attributes inherited from LeafPostList | |
| const Xapian::Weight * | weight = nullptr |
| std::string | term |
| The term name for this postlist (empty for an alldocs postlist). More... | |
| Xapian::termcount | collfreq |
| The collection frequency of the term. More... | |
| Protected Attributes inherited from Xapian::Internal::PostList | |
| Xapian::doccount | termfreq |
| Estimate of the number of documents this PostList will return. More... | |
Detailed Description
PostList in a honey database with positions.
Use a special subclass to avoid the size cost for the common case where we don't want positional data.
Definition at line 222 of file honey_postlist.h.
Constructor & Destructor Documentation
◆ HoneyPosPostList()
| HoneyPosPostList::HoneyPosPostList | ( | const HoneyDatabase * | db_, |
| std::string_view | term_, | ||
| HoneyCursor * | cursor_ | ||
| ) |
Definition at line 272 of file honey_postlist.cc.
Member Function Documentation
◆ get_description()
|
virtual |
Return a string description of this object.
Reimplemented from HoneyPostList.
Definition at line 289 of file honey_postlist.cc.
References LeafPostList::term.
◆ read_position_list()
|
virtual |
Read the position list for the term in the current document and return a pointer to it (owned by the PostList).
The default implementation throws Xapian::UnimplementedError.
Reimplemented from Xapian::Internal::PostList.
Definition at line 279 of file honey_postlist.cc.
References HoneyPostList::get_docid(), position_list, HoneyRePositionList::read_data(), and LeafPostList::term.
Member Data Documentation
◆ position_list
|
private |
PositionList object to reuse for OP_NEAR and OP_PHRASE.
This saves the overhead of creating objects for every document considered.
Definition at line 228 of file honey_postlist.h.
Referenced by read_position_list().
The documentation for this class was generated from the following files:
- backends/honey/honey_postlist.h
- backends/honey/honey_postlist.cc