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/**
* Copyright 2014 MongoDB 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/base/status.h"
#include "mongo/db/jsobj.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
/**
* Confirms that "o" only contains fields whose names are in "begin".."end",
* and that no field name occurs multiple times.
*
* On failure, returns BadValue and a message naming the unexpected field or DuplicateKey and a
* message naming the repeated field. "objectName" is included in the message, for reporting
* purposes.
*/
template <typename Iter>
Status bsonCheckOnlyHasFields(StringData objectName,
const BSONObj& o,
const Iter& begin,
const Iter& end) {
std::vector<int> occurrences(std::distance(begin, end), 0);
for (BSONObj::iterator iter(o); iter.more();) {
const BSONElement e = iter.next();
const Iter found = std::find(begin, end, e.fieldNameStringData());
if (found != end) {
++occurrences[std::distance(begin, found)];
} else {
return Status(ErrorCodes::BadValue,
str::stream() << "Unexpected field " << e.fieldName() << " in "
<< objectName);
}
}
int i = 0;
for (Iter curr = begin; curr != end; ++curr, ++i) {
if (occurrences[i] > 1) {
return Status(ErrorCodes::DuplicateKey,
str::stream() << "Field " << *curr << " appears " << occurrences[i]
<< " times in "
<< objectName);
}
}
return Status::OK();
}
/**
* Same as above, but operates over an array of string-ish items, "legals", instead
* of "begin".."end".
*/
template <typename StringType, int N>
Status bsonCheckOnlyHasFields(StringData objectName,
const BSONObj& o,
const StringType (&legals)[N]) {
return bsonCheckOnlyHasFields(objectName, o, &legals[0], legals + N);
}
} // namespace mongo
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