// expression.cpp

/**
 *    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.
 */

#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kDefault

#include "mongo/db/matcher/expression.h"

#include "mongo/bson/bsonobjiterator.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonmisc.h"
#include "mongo/util/log.h"

namespace mongo {

    MatchExpression::MatchExpression( MatchType type )
        : _matchType( type ) { }

    string MatchExpression::toString() const {
        StringBuilder buf;
        debugString( buf, 0 );
        return buf.str();
    }

    void MatchExpression::_debugAddSpace( StringBuilder& debug, int level ) const {
        for ( int i = 0; i < level; i++ )
            debug << "    ";
    }

    bool MatchExpression::matchesBSON( const BSONObj& doc, MatchDetails* details ) const {
        BSONMatchableDocument mydoc( doc );
        return matches( &mydoc, details );
    }


    void AtomicMatchExpression::debugString( StringBuilder& debug, int level ) const {
        _debugAddSpace( debug, level );
        debug << "$atomic\n";
    }

    void AtomicMatchExpression::toBSON(BSONObjBuilder* out) const {
        out->append("$isolated", 1);
    }

    void FalseMatchExpression::debugString( StringBuilder& debug, int level ) const {
        _debugAddSpace( debug, level );
        debug << "$false\n";
    }

    void FalseMatchExpression::toBSON(BSONObjBuilder* out) const {
        out->append("$false", 1);
    }

}