CategoryStream.hh

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/*
 * CategoryStream.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_CATEGORYSTREAM_HH
#define _LOG4CPP_CATEGORYSTREAM_HH

#include <log4cpp/Portability.hh>
#include <log4cpp/Priority.hh>
#include <ios>
#ifdef LOG4CPP_HAVE_SSTREAM
#include <sstream>
#endif
#include <log4cpp/Manipulator.hh>

namespace log4cpp {

    class LOG4CPP_EXPORT Category;
    class LOG4CPP_EXPORT CategoryStream;    
    LOG4CPP_EXPORT CategoryStream& eol (CategoryStream& os);

    LOG4CPP_EXPORT CategoryStream& left (CategoryStream& os);

    class LOG4CPP_EXPORT CategoryStream {
        public:

        CategoryStream(Category& category, Priority::Value priority);

        ~CategoryStream();
        
        inline Category& getCategory() const { return _category; };

        inline Priority::Value getPriority() const throw() { 
            return _priority; 
        };

        void flush();

                template<typename T> CategoryStream& operator<<(const T& t) {
            if (getPriority() != Priority::NOTSET) {
                if (!_buffer) {
                                        if (!(_buffer = new std::ostringstream)) {
                        // XXX help help help
                    }
                }
                (*_buffer) << t;
            }
            return *this;
        }
        
        template<typename T> 
        CategoryStream& operator<<(const std::string& t) {
            if (getPriority() != Priority::NOTSET) {
                if (!_buffer) {
                    if (!(_buffer = new std::ostringstream)) {
                        // XXX help help help
                    }
                }
                (*_buffer) << t;
            }
            return *this;
        }
#if LOG4CPP_HAS_WCHAR_T != 0
        template<typename T> 
        CategoryStream& operator<<(const std::wstring& t) {
            if (getPriority() != Priority::NOTSET) {
                if (!_wbuffer) {
                    if (!(_wbuffer = new std::wostringstream)) {
                        // XXX help help help
                    }
                }
                (*_wbuffer) << t;
            }
            return *this;
        }
#endif

                std::streamsize width(std::streamsize wide );


        private:
        Category& _category;
        Priority::Value _priority;
        union {
            std::ostringstream* _buffer;
#if LOG4CPP_HAS_WCHAR_T != 0
            std::wostringstream* _wbuffer;
#endif
        };

        public:
        typedef CategoryStream& (*cspf) (CategoryStream&);

        CategoryStream& operator<< (cspf);
        LOG4CPP_EXPORT friend CategoryStream& eol (CategoryStream& os);
        LOG4CPP_EXPORT friend CategoryStream& left (CategoryStream& os);
   };
}
#endif // _LOG4CPP_CATEGORYSTREAM_HH