rtt: rtt: DataSourceProxy.hpp Source File

00001 /***************************************************************************
00002   tag: The SourceWorks  Tue Sep 7 00:55:18 CEST 2010  DataSourceProxy.hpp
00003 
00004                         DataSourceProxy.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,       *
00027  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00028  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
00029  *   Lesser General Public License for more details.                       *
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 ORO_CORBA_DATASOURCE_PROXY_HPP
00040 #define ORO_CORBA_DATASOURCE_PROXY_HPP
00041 
00042 #include "../../internal/DataSource.hpp"
00043 #include "../../Logger.hpp"
00044 #include "../../base/ActionInterface.hpp"
00045 #include "CorbaConversion.hpp"
00046 #include "CorbaTypeTransporter.hpp"
00047 #include "CorbaLib.hpp"
00048 #include <cassert>
00049 
00050 namespace RTT
00051 {
00052     namespace corba
00053     {
00059         struct NonExistingDataSource
00060         {
00061         };
00065         template<class T>
00066         class DataSourceProxy
00067             : public internal::DataSource<T>
00068         {
00069             corba::CService_var mserv;
00070             const std::string mname;
00071             bool misproperty;
00072             mutable typename internal::DataSource<T>::value_t last_value;
00073             CorbaTypeTransporter* ctp;
00074 
00075         public:
00085             DataSourceProxy( corba::CService_ptr s, const std::string& name, bool isproperty )
00086                 : mserv( corba::CService::_duplicate( s ) ), mname(name), misproperty(isproperty)
00087             {
00088                 assert( !CORBA::is_nil(s) );
00089                 types::TypeTransporter* tp = this->getTypeInfo()->getProtocol(ORO_CORBA_PROTOCOL_ID);
00090                 ctp = dynamic_cast<corba::CorbaTypeTransporter*>(tp);
00091                 assert( ctp ); // only call this from CorbaTempateTypeInfo.
00092                 if ( misproperty && ! mserv->hasProperty( name.c_str()))
00093                     throw NonExistingDataSource();
00094                 if ( !misproperty && ! mserv->hasAttribute( name.c_str()))
00095                     throw NonExistingDataSource();
00096             }
00097 
00098             typename internal::DataSource<T>::result_t value() const {
00099                 return last_value;
00100             }
00101 
00102             typename internal::AssignableDataSource<T>::const_reference_t rvalue() const {
00103                 return last_value;
00104             }
00105 
00106             virtual typename internal::DataSource<T>::result_t get() const {
00107                 CORBA::Any_var res;
00108                 if ( misproperty ) {
00109                     res = mserv->getProperty( mname.c_str() );
00110                 } else {
00111                     res = mserv->getAttribute( mname.c_str() );
00112                 }
00113                 internal::ReferenceDataSource<T> rds(last_value);
00114                 rds.ref();
00115                 if ( ctp->updateFromAny(&res.in(),&rds ) == false)
00116                     Logger::log() <<Logger::Error << "Could not update DataSourceProxy from remote value!"<<Logger::endl;
00117                 return last_value;
00118             }
00119 
00120             virtual internal::DataSource<T>* clone() const {
00121                 return new DataSourceProxy<T>( corba::CService::_duplicate( mserv.in() ), mname, misproperty );
00122             }
00123 
00124             virtual internal::DataSource<T>* copy( std::map<const base::DataSourceBase*, base::DataSourceBase*>& alreadyCloned ) const {
00125                 alreadyCloned[this] = const_cast<DataSourceProxy<T>*>(this);
00126                 return const_cast<DataSourceProxy<T>*>(this);
00127             }
00128 
00129             virtual std::string getType() const {
00130                 // both should be equivalent, but we display the local type.
00131                 return internal::DataSource<T>::GetType();
00132                 //return std::string( mserv->getType() );
00133             }
00134 
00135         };
00136 
00140         template<class T>
00141         class ValueDataSourceProxy
00142             : public internal::AssignableDataSource<T>
00143         {
00144             typedef typename internal::AssignableDataSource<T>::value_t value_t;
00145             corba::CService_var mserv;
00146             const std::string mname;
00147             bool misproperty;
00148             typename internal::AssignableDataSource<value_t>::shared_ptr storage;
00149             CorbaTypeTransporter* ctp;
00150             //mutable typename internal::DataSource<T>::value_t last_value;
00151 
00152         public:
00153             ValueDataSourceProxy( corba::CService_ptr serv, const std::string& name, bool isproperty)
00154                 : mserv( corba::CService::_duplicate(serv) ), mname(name), misproperty(isproperty)
00155             {
00156                 storage = new internal::ValueDataSource<value_t>();
00157                 assert( serv );
00158                 types::TypeTransporter* tp = this->getTypeInfo()->getProtocol(ORO_CORBA_PROTOCOL_ID);
00159                 ctp = dynamic_cast<corba::CorbaTypeTransporter*>(tp);
00160                 assert(ctp);
00161                 if ( misproperty && !mserv->hasProperty( name.c_str()) )
00162                     throw NonExistingDataSource();
00163                 if ( !misproperty && ( !mserv->hasAttribute( name.c_str())  || !mserv->isAttributeAssignable( name.c_str()) ))
00164                     throw NonExistingDataSource();
00165                 this->get(); // initialize such that value()/rvalue() return a sane value !
00166             }
00167 
00168             typename internal::DataSource<T>::result_t value() const {
00169                 return storage->rvalue();
00170             }
00171 
00172             typename internal::AssignableDataSource<T>::const_reference_t rvalue() const {
00173                 return storage->rvalue();
00174             }
00175 
00176 
00177             virtual typename internal::DataSource<T>::result_t get() const {
00178                 CORBA::Any_var res;
00179                 if ( misproperty ) {
00180                     res = mserv->getProperty( mname.c_str() );
00181                 } else {
00182                     res = mserv->getAttribute( mname.c_str() );
00183                 }
00184                 internal::ReferenceDataSource<T> rds( storage->set() );
00185                 rds.ref();
00186                 if ( ctp->updateFromAny(&res.in(), &rds ) == false)
00187                     Logger::log() <<Logger::Error << "Could not update ValueDataSourceProxy from remote value!"<<Logger::endl;
00188                 return storage->rvalue();
00189             }
00190 
00191             virtual void set( typename internal::AssignableDataSource<T>::param_t t ) {
00192                 internal::ValueDataSource<T> vds(t);
00193                 vds.ref();
00194                 CORBA::Any_var toset = ctp->createAny(&vds);
00195                 if ( misproperty ) {
00196                     mserv->setProperty( mname.c_str(), toset.in() );
00197                 } else {
00198                     mserv->setAttribute( mname.c_str(), toset.in() );
00199                 }
00200                 storage->set( t );
00201             }
00202 
00203             virtual typename internal::AssignableDataSource<T>::reference_t set() {
00204                 this->get();
00205                 return storage->set();
00206             }
00207 
00208             virtual void updated()
00209             {
00210                 this->set( storage->value() );
00211             }
00212 
00213             virtual internal::AssignableDataSource<T>* clone() const {
00214                 return new ValueDataSourceProxy<T>( corba::CService::_duplicate( mserv.in() ), mname, misproperty );
00215             }
00216 
00217             virtual internal::AssignableDataSource<T>* copy( std::map<const base::DataSourceBase*, base::DataSourceBase*>& alreadyCloned ) const {
00218                 alreadyCloned[this] = const_cast<ValueDataSourceProxy<T>*>(this);
00219                 return const_cast<ValueDataSourceProxy<T>*>(this);
00220             }
00221         };
00222 
00223     }
00224 }
00225 
00226 #endif