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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/>.
*/
#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 {
/**
* This is the cursor that the caller of S2AccessMethod::newCursor actually gets. When you call
* seek on a S2IndexCursor, it creates another cursor depending on the predicate in the query.
* The behavior for $near is so different than the behavior for the other geo predicates that
* it's best to separate the cursors.
*/
class S2IndexCursor : public IndexCursor {
public:
S2IndexCursor(const S2IndexingParams& params, IndexDescriptor* descriptor);
virtual ~S2IndexCursor() { }
// Parse the query, figure out if it's a near or a non-near predicate, and create the
// appropriate sub-cursor.
virtual Status seek(const BSONObj& position);
virtual Status setOptions(const CursorOptions& options);
// Implemented:
virtual bool isEOF() const;
virtual BSONObj getKey() const;
virtual DiskLoc getValue() const;
virtual void next();
virtual string toString();
virtual Status savePosition();
virtual Status restorePosition();
private:
S2IndexingParams _params;
IndexDescriptor *_descriptor;
scoped_ptr<IndexCursor> _underlyingCursor;
};
} // namespace mongo
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