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/** @file contiguousalldocspostlist.cc
* @brief Iterate all document ids when they form a contiguous range.
*/
/* Copyright (C) 2007,2008,2009,2011 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 <string>
#include "contiguousalldocspostlist.h"
#include "omassert.h"
#include "str.h"
using namespace std;
Xapian::doccount
ContiguousAllDocsPostList::get_termfreq() const
{
return doccount;
}
Xapian::docid
ContiguousAllDocsPostList::get_docid() const
{
Assert(did != 0);
Assert(!at_end());
return did;
}
Xapian::termcount
ContiguousAllDocsPostList::get_doclength() const
{
Assert(did != 0);
Assert(!at_end());
return db->get_doclength(did);
}
Xapian::termcount
ContiguousAllDocsPostList::get_unique_terms() const
{
Assert(did != 0);
Assert(!at_end());
return db->get_unique_terms(did);
}
Xapian::termcount
ContiguousAllDocsPostList::get_wdf() const
{
Assert(did != 0);
Assert(!at_end());
return 1;
}
PositionList *
ContiguousAllDocsPostList::read_position_list()
{
// Throws the same exception.
return ContiguousAllDocsPostList::open_position_list();
}
PositionList *
ContiguousAllDocsPostList::open_position_list() const
{
throw Xapian::InvalidOperationError("Position lists not meaningful for ContiguousAllDocsPostList");
}
PostList *
ContiguousAllDocsPostList::next(double)
{
Assert(!at_end());
if (did == doccount) {
db = NULL;
} else {
++did;
}
return NULL;
}
PostList *
ContiguousAllDocsPostList::skip_to(Xapian::docid target, double)
{
Assert(!at_end());
if (target > did) {
if (target > doccount) {
db = NULL;
} else {
did = target;
}
}
return NULL;
}
bool
ContiguousAllDocsPostList::at_end() const
{
return db.get() == NULL;
}
string
ContiguousAllDocsPostList::get_description() const
{
string msg("ContiguousAllDocsPostList(1..");
msg += str(doccount);
msg += ')';
return msg;
}
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