#include <leafpostlist.h>
Inheritance diagram for LeafPostList:
Public Member Functions | |
| ~LeafPostList () | |
| void | set_termweight (const Xapian::Weight *weight_) |
| Set the weighting scheme to use during matching. | |
| virtual Xapian::doccount | get_termfreq () const=0 |
| Return the exact term frequency. | |
| Xapian::doccount | get_termfreq_min () const |
| Get a lower bound on the number of documents indexed by this term. | |
| Xapian::doccount | get_termfreq_max () const |
| Get an upper bound on the number of documents indexed by this term. | |
| Xapian::doccount | get_termfreq_est () const |
| Get an estimate of the number of documents indexed by this term. | |
| Xapian::weight | get_maxweight () const |
| Return an upper bound on what get_weight() can return. | |
| Xapian::weight | get_weight () const |
| Return the weight contribution for the current position. | |
| Xapian::weight | recalc_maxweight () |
| Recalculate the upper bound on what get_weight() can return. | |
Protected Member Functions | |
| LeafPostList () | |
| Only constructable as a base class for derived classes. | |
Protected Attributes | |
| const Xapian::Weight * | weight |
| bool | need_doclength |
Private Member Functions | |
| void | operator= (const LeafPostList &) |
| Don't allow assignment. | |
| LeafPostList (const LeafPostList &) | |
| Don't allow copying. | |
This class provides the following features in addition to the PostList class:
Definition at line 35 of file leafpostlist.h.
| LeafPostList::LeafPostList | ( | const LeafPostList & | ) | [private] |
Don't allow copying.
| LeafPostList::LeafPostList | ( | ) | [inline, protected] |
Only constructable as a base class for derived classes.
Definition at line 47 of file leafpostlist.h.
| LeafPostList::~LeafPostList | ( | ) |
| void LeafPostList::operator= | ( | const LeafPostList & | ) | [private] |
Don't allow assignment.
| void LeafPostList::set_termweight | ( | const Xapian::Weight * | weight_ | ) |
Set the weighting scheme to use during matching.
If this isn't called, get_weight() and get_maxweight() will both return 0.
You should not call this more than once on a particular object.
| weight_ | The weighting object to use. Must not be NULL. |
Definition at line 52 of file leafpostlist.cc.
References Assert, Xapian::Weight::get_sumpart_needs_doclength(), need_doclength, and weight.
Referenced by LocalSubMatch::postlist_from_op_leaf_query().
| virtual Xapian::doccount LeafPostList::get_termfreq | ( | ) | const [pure virtual] |
Return the exact term frequency.
Leaf postlists have an exact termfreq, which get_termfreq_min(), get_termfreq_max(), and get_termfreq_est() all report.
Implemented in ContiguousAllDocsPostList, FlintAllDocsPostList, FlintModifiedPostList, FlintPostList, InMemoryPostList, InMemoryAllDocsPostList, MultiPostList, QuartzAllDocsPostList, QuartzPostList, NetworkPostList, and EmptyPostList.
Referenced by get_termfreq_est(), get_termfreq_max(), and get_termfreq_min().
| Xapian::doccount LeafPostList::get_termfreq_min | ( | ) | const [virtual] |
Get a lower bound on the number of documents indexed by this term.
Implements Xapian::PostingIterator::Internal.
Definition at line 34 of file leafpostlist.cc.
References get_termfreq().
| Xapian::doccount LeafPostList::get_termfreq_max | ( | ) | const [virtual] |
Get an upper bound on the number of documents indexed by this term.
Implements Xapian::PostingIterator::Internal.
Definition at line 40 of file leafpostlist.cc.
References get_termfreq().
| Xapian::doccount LeafPostList::get_termfreq_est | ( | ) | const [virtual] |
Get an estimate of the number of documents indexed by this term.
It should always be true that: get_termfreq_min() <= get_termfreq_est() <= get_termfreq_max()
Implements Xapian::PostingIterator::Internal.
Definition at line 46 of file leafpostlist.cc.
References get_termfreq().
| Xapian::weight LeafPostList::get_maxweight | ( | ) | const [virtual] |
Return an upper bound on what get_weight() can return.
Implements Xapian::PostingIterator::Internal.
Reimplemented in EmptyPostList.
Definition at line 61 of file leafpostlist.cc.
References Xapian::Weight::get_maxpart(), and weight.
Referenced by recalc_maxweight().
| Xapian::weight LeafPostList::get_weight | ( | ) | const [virtual] |
Return the weight contribution for the current position.
Implements Xapian::PostingIterator::Internal.
Reimplemented in EmptyPostList.
Definition at line 67 of file leafpostlist.cc.
References Xapian::PostingIterator::Internal::get_doclength(), Xapian::Weight::get_sumpart(), Xapian::PostingIterator::Internal::get_wdf(), need_doclength, and weight.
| Xapian::weight LeafPostList::recalc_maxweight | ( | ) | [virtual] |
Recalculate the upper bound on what get_weight() can return.
If the tree has pruned, get_maxweight() may use cached values. Calling this method instead forces a full recalculation.
Implements Xapian::PostingIterator::Internal.
Definition at line 78 of file leafpostlist.cc.
References get_maxweight().
const Xapian::Weight* LeafPostList::weight [protected] |
Definition at line 43 of file leafpostlist.h.
Referenced by get_maxweight(), get_weight(), set_termweight(), and ~LeafPostList().
bool LeafPostList::need_doclength [protected] |