Filter.hh

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/*
 * Filter.hh
 *
 * Copyright 2001, LifeLine Networks BV (www.lifeline.nl). All rights reserved.
 * Copyright 2001, Bastiaan Bakker. All rights reserved.
 *
 * See the COPYING file for the terms of usage and distribution.
 */

#ifndef _LOG4CPP_FILTER_HH
#define _LOG4CPP_FILTER_HH

#include <log4cpp/LoggingEvent.hh>
#include <log4cpp/Portability.hh>

namespace log4cpp {

    class LOG4CPP_EXPORT Filter {
      public:
        typedef enum { DENY = -1, NEUTRAL = 0, ACCEPT = 1 } Decision;

        Filter();

        virtual ~Filter();

        virtual void setChainedFilter(Filter* filter);

        virtual Filter* getChainedFilter();

        virtual Filter* getEndOfChain();

        virtual void appendChainedFilter(Filter* filter);

        virtual Decision decide(const LoggingEvent& event);

      protected:
        virtual Decision _decide(const LoggingEvent& event) = 0;

      private:
        Filter* _chainedFilter;
    };

} // namespace log4cpp

#endif // _LOG4CPP_FILTER_HH