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// update_index_data.h
/**
* 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 <set>
#include "mongo/base/string_data.h"
namespace mongo {
/**
* a.$ -> a
* @return true if out is set and we made a change
*/
bool getCanonicalIndexField(StringData fullName, std::string* out);
/**
* Holds pre-processed index spec information to allow update to quickly determine if an update
* can be applied as a delta to a document, or if the document must be re-indexed.
*/
class UpdateIndexData {
public:
UpdateIndexData();
/**
* Register a path. Any update targeting this path (or a parent of this path) will
* trigger a recomputation of the document's index keys.
*/
void addPath(StringData path);
/**
* Register a path component. Any update targeting a path that contains this exact
* component will trigger a recomputation of the document's index keys.
*/
void addPathComponent(StringData pathComponent);
/**
* Register the "wildcard" path. All updates will trigger a recomputation of the document's
* index keys.
*/
void allPathsIndexed();
void clear();
bool mightBeIndexed(StringData path) const;
private:
bool _startsWith(StringData a, StringData b) const;
std::set<std::string> _canonicalPaths;
std::set<std::string> _pathComponents;
bool _allPathsIndexed;
};
}
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