oflog/include/dcmtk/oflog/spi/filter.h

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// Module:  Log4CPLUS
// File:    filter.h
// Created: 5/2003
// Author:  Tad E. Smith
//
//
// Copyright 1999-2009 Tad E. Smith
//
// Licensed 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 LOG4CPLUS_SPI_FILTER_HEADER_
#define LOG4CPLUS_SPI_FILTER_HEADER_

#include "dcmtk/oflog/config.h"
#include "dcmtk/oflog/helpers/pointer.h"
#include "dcmtk/oflog/helpers/property.h"
#include "dcmtk/oflog/spi/logevent.h"


namespace log4cplus {
    namespace spi {


        enum FilterResult { DENY, 
                            NEUTRAL, 
                            ACCEPT 
                          };

        // Forward Declarations
        class Filter;


        LOG4CPLUS_EXPORT FilterResult checkFilter(const Filter* filter,
                                                  const InternalLoggingEvent& event);

        typedef helpers::SharedObjectPtr<Filter> FilterPtr;


        class LOG4CPLUS_EXPORT Filter
            : public virtual log4cplus::helpers::SharedObject
        {
        public:
          // ctor and dtor
            Filter();
            virtual ~Filter();

          // Methods
            void appendFilter(FilterPtr filter);

            virtual FilterResult decide(const InternalLoggingEvent& event) const = 0;

          // Data
            FilterPtr next;
        };



        class LOG4CPLUS_EXPORT DenyAllFilter : public Filter {
        public:
            DenyAllFilter ();
            DenyAllFilter (const log4cplus::helpers::Properties&, log4cplus::tstring& error);

            virtual FilterResult decide(const InternalLoggingEvent& event) const;
        };


        class LOG4CPLUS_EXPORT LogLevelMatchFilter : public Filter {
        public:
            LogLevelMatchFilter();
            LogLevelMatchFilter(const log4cplus::helpers::Properties& p, log4cplus::tstring&);

            virtual FilterResult decide(const InternalLoggingEvent& event) const;

        private:
          // Methods
            void init();

          // Data
            bool acceptOnMatch;
            LogLevel logLevelToMatch;
        };



        class LOG4CPLUS_EXPORT LogLevelRangeFilter : public Filter {
        public:
          // ctors
            LogLevelRangeFilter();
            LogLevelRangeFilter(const log4cplus::helpers::Properties& p, log4cplus::tstring& error);

            virtual FilterResult decide(const InternalLoggingEvent& event) const;

        private:
          // Methods
            void init();

          // Data
            bool acceptOnMatch;
            LogLevel logLevelMin;
            LogLevel logLevelMax;
        };



        class LOG4CPLUS_EXPORT StringMatchFilter : public Filter {
        public:
          // ctors
            StringMatchFilter();
            StringMatchFilter(const log4cplus::helpers::Properties& p, log4cplus::tstring& error);

            virtual FilterResult decide(const InternalLoggingEvent& event) const;

        private:
          // Methods
            void init();

          // Data
            bool acceptOnMatch;
            log4cplus::tstring stringToMatch;
        };

    } // end namespace spi
} // end namespace log4cplus

#endif /* LOG4CPLUS_SPI_FILTER_HEADER_ */

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