ceph/src/boost/libs/log/src/setup/default_filter_factory.hpp

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   default_filter_factory.hpp
   9  * \author Andrey Semashev
  10  * \date   29.05.2010
  11  *
  12  * \brief  This header is the Boost.Log library implementation, see the library documentation
  13  *         at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
  14  */
  15
  16 #ifndef BOOST_DEFAULT_FILTER_FACTORY_HPP_INCLUDED_
  17 #define BOOST_DEFAULT_FILTER_FACTORY_HPP_INCLUDED_
  18
  19 #include <boost/log/detail/setup_config.hpp>
  20 #include <cstddef>
  21 #include <boost/log/attributes/attribute_name.hpp>
  22 #include <boost/log/attributes/value_visitation.hpp>
  23 #include <boost/log/utility/setup/filter_parser.hpp>
  24 #include <boost/log/utility/functional/save_result.hpp>
  25 #include <boost/log/detail/header.hpp>
  26
  27 namespace boost {
  28
  29 BOOST_LOG_OPEN_NAMESPACE
  30
  31 namespace aux {
  32
  33 //! Relation predicate wrapper
  34 template< typename ValueT, typename PredicateT >
  35 struct predicate_wrapper
  36 {
  37     typedef typename PredicateT::result_type result_type;
  38
  39     explicit predicate_wrapper(attribute_name const& name, PredicateT const& pred) : m_name(name), m_visitor(pred)
  40     {
  41     }
  42
  43     template< typename T >
  44     result_type operator() (T const& arg) const
  45     {
  46         bool res = false;
  47         boost::log::visit< ValueT >(m_name, arg, save_result_wrapper< PredicateT const&, bool >(m_visitor, res));
  48         return res;
  49     }
  50
  51 private:
  52     attribute_name m_name;
  53     const PredicateT m_visitor;
  54 };
  55
  56 //! The default filter factory that supports creating filters for the standard types (see utility/type_dispatch/standard_types.hpp)
  57 template< typename CharT >
  58 class default_filter_factory :
  59     public filter_factory< CharT >
  60 {
  61 private:
  62     //! Base type
  63     typedef filter_factory< CharT > base_type;
  64     //! Self type
  65     typedef default_filter_factory< CharT > this_type;
  66
  67 public:
  68     //  Type imports
  69     typedef typename base_type::char_type char_type;
  70     typedef typename base_type::string_type string_type;
  71
  72     //! The callback for equality relation filter
  73     virtual filter on_equality_relation(attribute_name const& name, string_type const& arg);
  74     //! The callback for inequality relation filter
  75     virtual filter on_inequality_relation(attribute_name const& name, string_type const& arg);
  76     //! The callback for less relation filter
  77     virtual filter on_less_relation(attribute_name const& name, string_type const& arg);
  78     //! The callback for greater relation filter
  79     virtual filter on_greater_relation(attribute_name const& name, string_type const& arg);
  80     //! The callback for less or equal relation filter
  81     virtual filter on_less_or_equal_relation(attribute_name const& name, string_type const& arg);
  82     //! The callback for greater or equal relation filter
  83     virtual filter on_greater_or_equal_relation(attribute_name const& name, string_type const& arg);
  84
  85     //! The callback for custom relation filter
  86     virtual filter on_custom_relation(attribute_name const& name, string_type const& rel, string_type const& arg);
  87
  88 private:
  89     //! The function parses the argument value for a binary relation and constructs the corresponding filter
  90     template< typename RelationT >
  91     static filter parse_argument(attribute_name const& name, string_type const& arg);
  92 };
  93
  94 //! The function parses the "matches" relation
  95 template< typename CharT >
  96 filter parse_matches_relation(attribute_name const& name, std::basic_string< CharT > const& operand);
  97
  98 } // namespace aux
  99
 100 BOOST_LOG_CLOSE_NAMESPACE // namespace log
 101
 102 } // namespace boost
 103
 104 #include <boost/log/detail/footer.hpp>
 105
 106 #endif // BOOST_DEFAULT_FILTER_FACTORY_HPP_INCLUDED_