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/** @file chert_alldocsmodifiedpostlist.cc
* @brief A ChertAllDocsPostList plus pending modifications.
*/
/* Copyright (C) 2008 Lemur Consulting Ltd
* Copyright (C) 2006,2007,2008,2009,2010,2011,2015 Olly Betts
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include "chert_alldocsmodifiedpostlist.h"
#include "chert_database.h"
#include "debuglog.h"
#include "str.h"
using namespace std;
using Xapian::Internal::intrusive_ptr;
ChertAllDocsModifiedPostList::ChertAllDocsModifiedPostList(intrusive_ptr<const ChertDatabase> db_,
Xapian::doccount doccount_,
const map<Xapian::docid, Xapian::termcount> & doclens_)
: ChertAllDocsPostList(db_, doccount_),
doclens(doclens_),
doclens_it(doclens.begin())
{
LOGCALL_CTOR(DB, "ChertAllDocsModifiedPostList", db_.get() | doccount_ | doclens_);
}
void
ChertAllDocsModifiedPostList::skip_deletes(double w_min)
{
LOGCALL_VOID(DB, "ChertAllDocsModifiedPostList::skip_deletes", w_min);
while (!ChertAllDocsPostList::at_end()) {
if (doclens_it == doclens.end()) return;
if (doclens_it->first != ChertAllDocsPostList::get_docid()) return;
if (doclens_it->second != static_cast<Xapian::termcount>(-1)) return;
++doclens_it;
ChertAllDocsPostList::next(w_min);
}
while (doclens_it != doclens.end() && doclens_it->second == static_cast<Xapian::termcount>(-1)) {
++doclens_it;
}
}
Xapian::docid
ChertAllDocsModifiedPostList::get_docid() const
{
LOGCALL(DB, Xapian::docid, "ChertAllDocsModifiedPostList::get_docid", NO_ARGS);
if (doclens_it == doclens.end()) RETURN(ChertAllDocsPostList::get_docid());
if (ChertAllDocsPostList::at_end()) RETURN(doclens_it->first);
RETURN(min(doclens_it->first, ChertAllDocsPostList::get_docid()));
}
Xapian::termcount
ChertAllDocsModifiedPostList::get_doclength() const
{
LOGCALL(DB, Xapian::termcount, "ChertAllDocsModifiedPostList::get_doclength", NO_ARGS);
// Override with value from doclens_it (which cannot be -1, because that
// would have been skipped past).
if (doclens_it != doclens.end() &&
(ChertAllDocsPostList::at_end() ||
doclens_it->first <= ChertAllDocsPostList::get_docid()))
RETURN(doclens_it->second);
RETURN(ChertAllDocsPostList::get_doclength());
}
Xapian::termcount
ChertAllDocsModifiedPostList::get_unique_terms() const
{
LOGCALL(DB, Xapian::termcount, "ChertAllDocsModifiedPostList::get_unique_terms", NO_ARGS);
Assert(this_db.get());
RETURN(this_db->get_unique_terms(get_docid()));
}
PostList *
ChertAllDocsModifiedPostList::next(double w_min)
{
LOGCALL(DB, PostList *, "ChertAllDocsModifiedPostList::next", w_min);
if (have_started) {
if (ChertAllDocsPostList::at_end()) {
++doclens_it;
skip_deletes(w_min);
RETURN(NULL);
}
Xapian::docid unmod_did = ChertAllDocsPostList::get_docid();
if (doclens_it != doclens.end() && doclens_it->first <= unmod_did) {
if (doclens_it->first < unmod_did &&
doclens_it->second != static_cast<Xapian::termcount>(-1)) {
++doclens_it;
skip_deletes(w_min);
RETURN(NULL);
}
++doclens_it;
}
}
ChertAllDocsPostList::next(w_min);
skip_deletes(w_min);
RETURN(NULL);
}
PostList *
ChertAllDocsModifiedPostList::skip_to(Xapian::docid desired_did,
double w_min)
{
LOGCALL(DB, PostList *, "ChertAllDocsModifiedPostList::skip_to", desired_did | w_min);
if (!ChertAllDocsPostList::at_end())
ChertAllDocsPostList::skip_to(desired_did, w_min);
/* FIXME: should we use lower_bound() on the map? */
while (doclens_it != doclens.end() && doclens_it->first < desired_did) {
++doclens_it;
}
skip_deletes(w_min);
RETURN(NULL);
}
bool
ChertAllDocsModifiedPostList::at_end() const
{
LOGCALL(DB, bool, "ChertAllDocsModifiedPostList::at_end", NO_ARGS);
RETURN(doclens_it == doclens.end() && ChertAllDocsPostList::at_end());
}
string
ChertAllDocsModifiedPostList::get_description() const
{
string desc = "ChertAllDocsModifiedPostList(did=";
desc += str(get_docid());
desc += ')';
return desc;
}
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