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

LOG4CPP_NS_BEGIN

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;

};

LOG4CPP_NS_END

#endif // _LOG4CPP_FILTER_HH