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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 <string>
#include <vector>
#include "mongo/base/owned_pointer_vector.h"
#include "mongo/base/status.h"
#include "mongo/bson/mutable/document.h"
#include "mongo/db/field_ref_set.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/ops/modifier_interface.h"
#include "mongo/db/ops/modifier_table.h"
#include "mongo/db/query/canonical_query.h"
#include "mongo/db/update_index_data.h"
namespace mongo {
class UpdateDriver {
public:
struct Options;
UpdateDriver(const Options& opts);
~UpdateDriver();
/**
* Returns OK and fills in '_mods' if 'updateExpr' is correct. Otherwise returns an
* error status with a corresponding description.
*/
Status parse(const BSONObj& updateExpr, const bool multi = false);
/**
* Fills in document with any fields in the query which are valid.
*
* Valid fields include equality matches like "a":1, or "a.b":false
*
* Each valid field will be expanded (from dot notation) and conflicts will be
* checked for all fields added to the underlying document.
*
* Returns Status::OK() if the document can be used. If there are any error or
* conflicts along the way then those errors will be returned.
*/
Status populateDocumentWithQueryFields(const BSONObj& query,
const std::vector<FieldRef*>* immutablePaths,
mutablebson::Document& doc) const;
Status populateDocumentWithQueryFields(const CanonicalQuery* query,
const std::vector<FieldRef*>* immutablePaths,
mutablebson::Document& doc) const;
/**
* return a BSONObj with the _id field of the doc passed in, or the doc itself.
* If no _id and multi, error.
*/
BSONObj makeOplogEntryQuery(const BSONObj& doc, bool multi) const;
/**
* Returns OK and executes '_mods' over 'doc', generating 'newObj'. If any mod is
* positional, use 'matchedField' (index of the array item matched). If doc allows
* mods to be applied in place and no index updating is involved, then the mods may
* be applied "in place" over 'doc'.
*
* If the driver's '_logOp' mode is turned on, and if 'logOpRec' is not NULL, fills in
* the latter with the oplog entry corresponding to the update. If '_mods' can't be
* applied, returns an error status with a corresponding description.
*
* If a non-NULL updatedField vector* is supplied,
* then all updated fields will be added to it.
*/
Status update(StringData matchedField,
mutablebson::Document* doc,
BSONObj* logOpRec = NULL,
FieldRefSet* updatedFields = NULL,
bool* docWasModified = NULL);
//
// Accessors
//
size_t numMods() const;
bool isDocReplacement() const;
bool modsAffectIndices() const;
void refreshIndexKeys(const UpdateIndexData* indexedFields);
bool logOp() const;
void setLogOp(bool logOp);
ModifierInterface::Options modOptions() const;
void setModOptions(ModifierInterface::Options modOpts);
ModifierInterface::ExecInfo::UpdateContext context() const;
void setContext(ModifierInterface::ExecInfo::UpdateContext context);
mutablebson::Document& getDocument() {
return _objDoc;
}
const mutablebson::Document& getDocument() const {
return _objDoc;
}
bool needMatchDetails() const {
return _positional;
}
private:
/** Resets the state of the class associated with mods (not the error state) */
void clear();
/** Create the modifier and add it to the back of the modifiers vector */
inline Status addAndParse(const modifiertable::ModifierType type,
const BSONElement& elem);
//
// immutable properties after parsing
//
// Is there a list of $mod's on '_mods' or is it just full object replacement?
bool _replacementMode;
// Collection of update mod instances. Owned here.
std::vector<ModifierInterface*> _mods;
// What are the list of fields in the collection over which the update is going to be
// applied that participate in indices?
//
// NOTE: Owned by the collection's info cache!.
const UpdateIndexData* _indexedFields;
//
// mutable properties after parsing
//
// Should this driver generate an oplog record when it applies the update?
bool _logOp;
// The options to initiate the mods with
ModifierInterface::Options _modOptions;
// Are any of the fields mentioned in the mods participating in any index? Is set anew
// at each call to update.
bool _affectIndices;
// Do any of the mods require positional match details when calling 'prepare'?
bool _positional;
// Is this update going to be an upsert?
ModifierInterface::ExecInfo::UpdateContext _context;
// The document used to represent or store the object being updated.
mutablebson::Document _objDoc;
// The document used to build the oplog entry for the update.
mutablebson::Document _logDoc;
};
struct UpdateDriver::Options {
bool logOp;
ModifierInterface::Options modOptions;
Options() : logOp(false), modOptions() {}
};
} // namespace mongo
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