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/**
* Copyright (C) 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <vector>
#include "mongo/db/btreecursor.h"
#include "mongo/db/geo/geoquery.h"
#include "mongo/db/geo/s2common.h"
#include "mongo/db/index/index_cursor.h"
#include "mongo/db/index/index_descriptor.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/pdfile.h"
#include "mongo/platform/unordered_set.h"
#include "third_party/s2/s2cap.h"
#include "third_party/s2/s2regionintersection.h"
namespace mongo {
class S2SimpleCursor : public IndexCursor {
public:
S2SimpleCursor(IndexDescriptor* descriptor, const S2IndexingParams& params);
virtual ~S2SimpleCursor() { }
// Not implemented
virtual Status seek(const BSONObj& position);
Status setOptions(const CursorOptions& options);
// Implemented:
// Not part of the IndexCursor spec.
void seek(const BSONObj& query, const vector<GeoQuery>& regions);
bool isEOF() const;
BSONObj getKey() const;
DiskLoc getValue() const;
void next();
virtual string toString();
virtual Status savePosition();
virtual Status restorePosition();
private:
IndexDescriptor* _descriptor;
// The query with the geo stuff taken out. We use this with a matcher.
BSONObj _filteredQuery;
// What geo regions are we looking for?
vector<GeoQuery> _fields;
// How were the keys created? We need this to search for the right stuff.
S2IndexingParams _params;
// What have we checked so we don't repeat it and waste time?
unordered_set<DiskLoc, DiskLoc::Hasher> _seen;
// This really does all the work/points into the btree.
scoped_ptr<BtreeCursor> _btreeCursor;
// Stat counters/debug information goes below:
// How many items did we look at in the btree?
long long _nscanned;
// How many did we try to match?
long long _matchTested;
// How many did we geo-test?
long long _geoTested;
// How many cells were in our cover?
long long _cellsInCover;
};
} // namespace mongo
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