Orocos Real-Time Toolkit  2.5.0
ConditionCache.hpp
00001 /***************************************************************************
00002   tag: The SourceWorks  Tue Sep 7 00:55:18 CEST 2010  ConditionCache.hpp
00003 
00004                         ConditionCache.hpp -  description
00005                            -------------------
00006     begin                : Tue September 07 2010
00007     copyright            : (C) 2010 The SourceWorks
00008     email                : peter@thesourceworks.com
00009 
00010  ***************************************************************************
00011  *   This library is free software; you can redistribute it and/or         *
00012  *   modify it under the terms of the GNU General Public                   *
00013  *   License as published by the Free Software Foundation;                 *
00014  *   version 2 of the License.                                             *
00015  *                                                                         *
00016  *   As a special exception, you may use this file as part of a free       *
00017  *   software library without restriction.  Specifically, if other files   *
00018  *   instantiate templates or use macros or inline functions from this     *
00019  *   file, or you compile this file and link it with other files to        *
00020  *   produce an executable, this file does not by itself cause the         *
00021  *   resulting executable to be covered by the GNU General Public          *
00022  *   License.  This exception does not however invalidate any other        *
00023  *   reasons why the executable file might be covered by the GNU General   *
00024  *   Public License.                                                       *
00025  *                                                                         *
00026  *   This library is distributed in the hope that it will be useful,       *
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00028  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
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00030  *                                                                         *
00031  *   You should have received a copy of the GNU General Public             *
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00033  *   Foundation, Inc., 59 Temple Place,                                    *
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00035  *                                                                         *
00036  ***************************************************************************/
00037 
00038 
00039 #ifndef CONDITION_CACHE_HPP
00040 #define CONDITION_CACHE_HPP
00041 
00042 #include "ConditionInterface.hpp"
00043 #include "../internal/DataSources.hpp"
00044 
00045 namespace RTT
00046 { namespace scripting {
00047 
00048 
00054     class RTT_SCRIPTING_API ConditionCache
00055         : public ConditionInterface
00056     {
00057         boost::shared_ptr<ConditionInterface> mc;
00058         internal::AssignableDataSource<bool>::shared_ptr result;
00059     public:
00060         ConditionCache( ConditionInterface* c, internal::AssignableDataSource<bool>::shared_ptr ds = internal::AssignableDataSource<bool>::shared_ptr() )
00061             : mc(c), result( ds ? ds : new internal::ValueDataSource<bool>(false) )
00062         {
00063         }
00064 
00065         virtual ~ConditionCache()
00066         {
00067         }
00068 
00069         virtual bool evaluate()
00070         {
00071             result->set( mc->evaluate() );
00072             return result->value();
00073         }
00074 
00075         virtual void reset() {
00076             result->set( false );
00077         }
00078 
00079         internal::DataSource<bool>::shared_ptr getResult() { return result; }
00080 
00081         virtual ConditionInterface* copy( std::map<const base::DataSourceBase*, base::DataSourceBase*>& alreadyCloned ) const
00082         {
00083             return new ConditionCache( mc->copy(alreadyCloned), result->copy(alreadyCloned) );
00084         }
00085 
00089         virtual ConditionInterface* clone() const
00090         {
00091             return new ConditionCache( mc->clone(), result );
00092         }
00093     };
00094 }}
00095 
00096 #endif