AssignCommand.hpp

/***************************************************************************
  tag: Peter Soetens  Mon Jun 26 13:25:56 CEST 2006  AssignCommand.hpp

                        AssignCommand.hpp -  description
                           -------------------
    begin                : Mon June 26 2006
    copyright            : (C) 2006 Peter Soetens
    email                : peter.soetens@fmtc.be

 ***************************************************************************
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU General Public                   *
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 *   version 2 of the License.                                             *
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 *   software library without restriction.  Specifically, if other files   *
 *   instantiate templates or use macros or inline functions from this     *
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 *   produce an executable, this file does not by itself cause the         *
 *   resulting executable to be covered by the GNU General Public          *
 *   License.  This exception does not however invalidate any other        *
 *   reasons why the executable file might be covered by the GNU General   *
 *   Public License.                                                       *
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 ***************************************************************************/

#include "DataSource.hpp"

#ifndef ORO_ASSIGNCOMMAND_HPP
#define ORO_ASSIGNCOMMAND_HPP

#include "CommandInterface.hpp"

namespace RTT
{
    namespace detail {

        template<typename T, typename S = T>
        class AssignCommand
            : public CommandInterface
        {
        public:
            typedef typename AssignableDataSource<T>::shared_ptr LHSSource;
            typedef typename DataSource<S>::const_ptr RHSSource;
        private:
            LHSSource lhs;
            RHSSource rhs;
        public:
            AssignCommand( LHSSource l, RHSSource r )
                : lhs( l ), rhs( r )
            {
            }

            void readArguments() {
                rhs->evaluate();
            }

            bool execute()
            {
                lhs->set( rhs->value() );
                return true;
            }

            virtual CommandInterface* clone() const
            {
                return new AssignCommand( lhs.get(), rhs.get() );
            }

            virtual CommandInterface* copy( std::map<const DataSourceBase*, DataSourceBase*>& alreadyCloned ) const {
                return new AssignCommand( lhs->copy( alreadyCloned ), rhs->copy( alreadyCloned ) );
            }
        };

        template<typename T, typename APred, typename S = T>
        class AssignContainerCommand
            : public CommandInterface
        {
            typedef typename AssignableDataSource<T>::shared_ptr LHSSource;
            LHSSource lhs;
            typedef typename DataSource<S>::const_ptr RHSSource;
            RHSSource rhs;
        public:
            AssignContainerCommand( LHSSource l, RHSSource r )
                : lhs( l ), rhs( r )
            {
            }

            void readArguments() {
                rhs->evaluate();
            }

            bool execute()
            {
                if ( APred()( lhs->get(), rhs->value()) == false )
                    return false;
                lhs->set( rhs->value() );
                return true;
            }

            virtual CommandInterface* clone() const
            {
                return new AssignContainerCommand( lhs.get(), rhs.get() );
            }

            virtual CommandInterface* copy( std::map<const DataSourceBase*, DataSourceBase*>& alreadyCloned ) const {
                return new AssignContainerCommand( lhs->copy( alreadyCloned ), rhs->copy( alreadyCloned ) );
            }
        };

        template<typename T, typename Index, typename SetType, typename Pred>
        class AssignIndexCommand
            : public CommandInterface
        {
            typedef typename DataSource<Index>::shared_ptr IndexSource;
            IndexSource i;
            typedef typename AssignableDataSource<T>::shared_ptr LHSSource;
            LHSSource lhs;
            typedef typename DataSource<SetType>::shared_ptr RHSSource;
            RHSSource rhs;
        public:
            AssignIndexCommand( LHSSource l, IndexSource index, RHSSource r)
                : i(index),lhs( l ), rhs( r )
            {
            }

            void readArguments() {
                rhs->evaluate();
            }

            bool execute()
            {
                Index ind = i->get();
                if ( Pred()( lhs->get(), ind) && &(lhs->set()) != 0 ) {
                    lhs->set()[ ind ] = rhs->value();
                    lhs->updated();
                    return true;
                }
                return false;
            }

            virtual CommandInterface* clone() const
            {
                return new AssignIndexCommand( lhs.get(), i.get(), rhs.get() );
            }

            virtual CommandInterface* copy( std::map<const DataSourceBase*, DataSourceBase*>& alreadyCloned ) const {
                return new AssignIndexCommand( lhs->copy( alreadyCloned ), i->copy( alreadyCloned ), rhs->copy( alreadyCloned ) );
            }
        };
    }
}

#endif