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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef _LOG4CXX_SPI_ROOT_LOGGER_H
#define _LOG4CXX_SPI_ROOT_LOGGER_H

#include <log4cxx/logger.h>

namespace log4cxx
{
        namespace spi
        {
        /**
        RootLogger sits at the top of the logger hierachy. It is a
        regular logger except that it provides several guarantees.

        <p>First, it cannot be assigned a null
        level. Second, since root logger cannot have a parent, the
        #getEffectiveLevel method always returns the value of the
        level field without walking the hierarchy.
        */
        class LOG4CXX_EXPORT RootLogger : public Logger
                {
                public:
            /**
            The root logger names itself as "root". However, the root
            logger cannot be retrieved by name.
            */
            RootLogger(log4cxx::helpers::Pool& pool, const LevelPtr& level);

            /**
            Return the assigned level value without walking the logger
            hierarchy.
            */
            virtual const LevelPtr& getEffectiveLevel() const;

            /**
                        Setting a null value to the level of the root logger may have catastrophic
                        results. We prevent this here.
                        */
            void setLevel(const LevelPtr& level);
                };
        }  // namespace spi
} // namespace log4cxx

#endif //_LOG4CXX_SPI_ROOT_LOGGER_H