virtual base::DataSourceBase::shared_ptr getMember(base::DataSourceBase::shared_ptr item,
base::DataSourceBase::shared_ptr id) const {
using namespace internal;
typename DataSource<T>::shared_ptr data = boost::dynamic_pointer_cast< DataSource<T> >( item );
if ( !data ) {
return base::DataSourceBase::shared_ptr();
}
// discover if user gave us a part name or index:
typename DataSource<string>::shared_ptr id_name = DataSource<string>::narrow( id.get() );
if ( id_name ) {
// size and capacity can not change during program execution:
if (id_name->get() == "size" || id_name->get() == "capacity") {
return new ConstantDataSource<int>( data->rvalue().count() );
} else {
log(Error) << "CArrayTypeInfo: No such part : " << id_name->get() << endlog();
return base::DataSourceBase::shared_ptr();
}
}
typename AssignableDataSource<T>::shared_ptr adata = boost::dynamic_pointer_cast< AssignableDataSource<T> >( item );
if ( !adata ) {
log(Error) << "CArrayTypeInfo: need assignable data type for indexing " << this->getTypeName() << endlog();
return base::DataSourceBase::shared_ptr();
}
typename DataSource<unsigned int>::shared_ptr id_indx = DataSource<unsigned int>::narrow( DataSourceTypeInfo<unsigned int>::getTypeInfo()->convert(id).get() );
if ( id_indx ) {
return new ArrayPartDataSource<typename T::value_type>( *adata->set().address(), id_indx, item, data->rvalue().count() );
}
log(Error) << "CArrayTypeInfo: Invalid index) for type " << this->getTypeName() << endlog();
return base::DataSourceBase::shared_ptr();
}
virtual base::DataSourceBase::shared_ptr getMember(base::DataSourceBase::shared_ptr item, const std::string& name) const {
using namespace internal;
typename DataSource<T>::shared_ptr data = boost::dynamic_pointer_cast< DataSource<T> >( item );
// size and capacity can not change during program execution:
if (name == "size" || name == "capacity") {
return new ConstantDataSource<int>( data->rvalue().count() );
}
typename AssignableDataSource<T>::shared_ptr adata = boost::dynamic_pointer_cast< AssignableDataSource<T> >( item );
if ( !adata ) {
return base::DataSourceBase::shared_ptr();
}
// contents of indx can change during program execution:
try {
unsigned int indx = boost::lexical_cast<unsigned int>(name);
// @todo could also return a direct reference to item indx using another DS type that respects updated().
return new ArrayPartDataSource<typename T::value_type>( *adata->set().address(), new ConstantDataSource<unsigned int>(indx), item, data->rvalue().count() );
} catch(...) {}
log(Error) << "CArrayTypeInfo: No such part (or invalid index): " << name << endlog();
return base::DataSourceBase::shared_ptr();
}
virtual void callback()
{
mfoo( marg->set() );
}
virtual void callback()
{
mfoo( marg1->set(), marg2->set(), marg3->set() );
}
