PrimitiveTypeInfo.hpp

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/***************************************************************************
  tag: Peter Soetens Fri Jun 10 15:16:01 2011 +0200 PrimitiveTypeInfo.hpp

                        PrimitiveTypeInfo.hpp -  description
                           -------------------
    begin                : Fri Jun 10 2011
    copyright            : (C) 2011 Peter Soetens
    email                : peter@thesourceworks.com

 ***************************************************************************
 *   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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 *   resulting executable to be covered by the GNU General Public          *
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#ifndef ORO_PRIMITIVE_TYPEINFO_HPP
#define ORO_PRIMITIVE_TYPEINFO_HPP

#include "Types.hpp"
#include "../Property.hpp"
#include "../Attribute.hpp"
#include "../Logger.hpp"
#include "TypeStreamSelector.hpp"
#include "TypeInfoGenerator.hpp"
#include "StreamFactory.hpp"
#include "TemplateValueFactory.hpp"
#include "../rtt-config.h"

namespace RTT
{
    namespace types {

    template<typename T, bool use_ostream = false>
    class PrimitiveTypeInfo :
            public TypeInfoGenerator,
            public TemplateValueFactory<T>,
            public StreamFactory
    {
    protected:
        const std::string tname;
        boost::shared_ptr<PrimitiveTypeInfo<T, use_ostream> > mshared;
    public:
        typedef T DataType;

        PrimitiveTypeInfo(std::string name)
            : tname(name)
        {
        }

        virtual ~PrimitiveTypeInfo()
        {
        }

        boost::shared_ptr<PrimitiveTypeInfo<T, use_ostream> > getSharedPtr() {
            if (!mshared)
                mshared.reset(this);
            return mshared;
        }

        bool installTypeInfoObject(TypeInfo* ti) {
            // Install the factories for primitive types
            ti->setValueFactory( this->getSharedPtr() );
            if (use_ostream)
              ti->setStreamFactory( this->getSharedPtr() );

            // Install the type info object for T
            internal::DataSourceTypeInfo<T>::value_type_info::TypeInfoObject = ti;
            ti->setTypeId( &typeid(T) );

            // Clean up reference to ourselves.
            mshared.reset();
            // Don't delete us, we're memory-managed.
            return false;
        }

        TypeInfo* getTypeInfoObject() const {
            return TypeInfoRepository::Instance()->getTypeInfo<T>();
        }

        virtual const std::string& getTypeName() const { return tname; }

        virtual std::ostream& write( std::ostream& os, base::DataSourceBase::shared_ptr in ) const {
            typename internal::DataSource<T>::shared_ptr d = boost::dynamic_pointer_cast< internal::DataSource<T> >( in );
            if ( d ) {
                types::TypeStreamSelector<T, use_ostream>::write( os, d->rvalue() );
            }
            return os;
        }

        virtual std::istream& read( std::istream& os, base::DataSourceBase::shared_ptr out ) const {
            typename internal::AssignableDataSource<T>::shared_ptr d = boost::dynamic_pointer_cast< internal::AssignableDataSource<T> >( out );
            if ( d ) {
                types::TypeStreamSelector<T, use_ostream>::read( os, d->set() );
                d->updated(); // because use of set().
            }
            return os;
        }

        virtual bool isStreamable() const {
            return use_ostream;
        }

        virtual bool composeType( base::DataSourceBase::shared_ptr source, base::DataSourceBase::shared_ptr result) const {
            return false;
        }

        virtual base::DataSourceBase::shared_ptr decomposeType(base::DataSourceBase::shared_ptr source) const
        {
            return source;
        }

        virtual bool decomposeType( base::DataSourceBase::shared_ptr source, PropertyBag& targetbag ) const {
            return false;
        }
    };
}}

#endif