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// 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 <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.
*/
#include "mongo/db/index/index_descriptor.h"
namespace mongo {
namespace {
void populateOptionsMap( std::map<StringData, BSONElement>& 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" ||
fieldName == "background" || // this is a creation time option only
fieldName == "dropDups" || // this is a creation time option only
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<StringData, BSONElement> existingOptionsMap;
populateOptionsMap( existingOptionsMap, infoObj() );
std::map<StringData, BSONElement> newOptionsMap;
populateOptionsMap( newOptionsMap, other->infoObj() );
return existingOptionsMap == newOptionsMap;
}
}
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