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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 "mongo/db/jsobj.h"
namespace mongo {
class Collection;
class IndexDescriptor;
class OperationContext;
/**
* There has been some behavior concerning indexed access patterns -- both pre and post-index
* construction -- that does not quite fit in the access pattern model implemented in
* index/index_access_pattern.h. Such behavior can't be changed in the current implementation of
* the code.
*
* We grouped such exception/legacy behavior here.
*/
class IndexLegacy {
public:
/**
* Adjust the provided index spec BSONObj depending on the type of index obj describes.
*
* This is a no-op unless the object describes a TEXT or a GEO_2DSPHERE index. TEXT and
* GEO_2DSPHERE provide additional validation on the index spec, and tweak the index spec
* object to conform to their expected format.
*/
static BSONObj adjustIndexSpecObject(const BSONObj& obj);
/**
* Returns the BSONObj that is inserted into an index when the object is missing the keys
* the index is over.
*
* For every index *except hash*, this is the BSON equivalent of jstNULL.
* For the hash index, it's the hash of BSON("" << BSONNULL).
*
* s/d_split.cpp needs to know this.
*
* This is a significant leak of index functionality out of the index layer.
*/
static BSONObj getMissingField(OperationContext* txn,
Collection* collection,
const BSONObj& infoObj);
};
} // namespace mongo
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