// index_descriptor.cpp
/**
* Copyright (C) 2014 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 .
*
* 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kIndex
#include "mongo/db/index/index_descriptor.h"
#include "mongo/util/log.h"
namespace mongo {
namespace {
void populateOptionsMap(std::map& theMap, const BSONObj& spec) {
BSONObjIterator it(spec);
while (it.more()) {
const BSONElement e = it.next();
StringData fieldName = e.fieldNameStringData();
if (fieldName == "key" || fieldName == "ns" || fieldName == "name" ||
fieldName == "v" || // not considered for equivalence
fieldName == "textIndexVersion" || // same as "v"
fieldName == "2dsphereIndexVersion" || // same as "v"
fieldName == "background" || // this is a creation time option only
fieldName == "dropDups" || // this is now ignored
fieldName == "sparse" || // checked specially
fieldName == "unique" // check specially
) {
continue;
}
theMap[fieldName] = e;
}
}
}
bool IndexDescriptor::areIndexOptionsEquivalent(const IndexDescriptor* other) const {
if (isSparse() != other->isSparse()) {
return false;
}
if (!isIdIndex() && unique() != other->unique()) {
// Note: { _id: 1 } or { _id: -1 } implies unique: true.
return false;
}
// Then compare the rest of the options.
std::map existingOptionsMap;
populateOptionsMap(existingOptionsMap, infoObj());
std::map newOptionsMap;
populateOptionsMap(newOptionsMap, other->infoObj());
return existingOptionsMap == newOptionsMap;
}
void IndexDescriptor::_checkOk() const {
if (_magic == 123987)
return;
log() << "uh oh: " << (void*)(this) << " " << _magic;
invariant(0);
}
}