ViewHelper Namespace Reference

Classes
class	ViewMerger

Functions
template<typename T>
StatusCode	makeAndPopulate (std::string const &viewNameRoot, ViewContainer *viewVector, SG::WriteHandleKey< T > const &populateKey, EventContext const &sourceContext, std::vector< T > const &inputData, bool const allowFallThrough=true)
StatusCode	scheduleSingleView (SG::View *view, std::string const &nodeName, EventContext const &sourceContext, EventIDBase::number_type conditionsRun, SmartIF< IScheduler > scheduler)
StatusCode	scheduleViews (ViewContainer *viewVector, std::string const &nodeName, EventContext const &sourceContext, SmartIF< IScheduler > scheduler, bool reverseOrder=false)
SG::View *	makeView (const std::string &common_name, int const unique_index=-1, bool const allowFallThrough=true)
template<typename KEY>
auto	makeHandle (const SG::View *view, const KEY &key, const EventContext &ctx)
	Create a view handle from a handle key.
template<typename T, typename CONT>
SG::WriteDecorHandle< CONT, T >	makeHandle (const SG::View *view, const SG::WriteDecorHandleKey< CONT > &dKey, const EventContext &context)
	Create WriteDecorHandle for given view and WriteDecorHandleKey.
template<typename T>
ElementLink< T >	makeLink (const SG::View *view, const SG::ReadHandle< T > &handle, size_t index)
	Create EL to a collection in view.

Function Documentation

makeAndPopulate()

template<typename T>

StatusCode ViewHelper::makeAndPopulate ( std::string const & viewNameRoot, ViewContainer * viewVector, SG::WriteHandleKey< T > const & populateKey, EventContext const & sourceContext, std::vector< T > const & inputData, bool const allowFallThrough = true )

inline

Definition at line 25 of file ViewHelper.h.

  {
    //Check for spaces in the name
    if ( viewNameRoot.find( ' ' ) != std::string::npos )
    {
      return StatusCode::FAILURE;
    }
 
    //Make a WriteHandle to use
    SG::WriteHandle<T> populateHandle( populateKey, sourceContext );
 
    //Loop over all input data
    unsigned int const viewNumber = inputData.size();
    for ( unsigned int viewIndex = 0; viewIndex < viewNumber; ++viewIndex )
    {
      //Create view
      SG::View * outputView = new SG::View( viewNameRoot, viewIndex, allowFallThrough );
      viewVector->push_back( outputView );
 
      //Attach a handle to the view
      StatusCode sc = populateHandle.setProxyDict( outputView );
      if ( !sc.isSuccess() )
      {
        viewVector->clear();
        return sc;
      }
 
      //Populate the view
      sc = populateHandle.record( std::make_unique< T >( inputData[ viewIndex ] ) );
      if ( !sc.isSuccess() )
      {
        viewVector->clear();
        return sc;
      }
    }
 
    return StatusCode::SUCCESS;
  }

makeHandle() [1/2]

template<typename KEY>

auto ViewHelper::makeHandle	(	const SG::View *	view,
		const KEY &	key,
		const EventContext &	ctx )

Create a view handle from a handle key.

Template Parameters

KEY

Key type

Parameters

view	View object
key	VarHandleKey
ctx	EventContext

Returns

Handle corresponding to the key type (can be invalid)

Definition at line 273 of file ViewHelper.h.

  {
    // setProxyDict only supports non-const stores
    SG::View* nview ATLAS_THREAD_SAFE = const_cast< SG::View* >( view );
    auto handle = SG::makeHandle( key, ctx );
    handle.setProxyDict( nview ).ignore();  // can never fail
    return handle;
  }

makeHandle() [2/2]

template<typename T, typename CONT>

SG::WriteDecorHandle< CONT, T > ViewHelper::makeHandle	(	const SG::View *	view,
		const SG::WriteDecorHandleKey< CONT > &	dKey,
		const EventContext &	context )

Create WriteDecorHandle for given view and WriteDecorHandleKey.

Template Parameters

T	Decoration type (e.g. float)
CONT	Container type

Parameters

view	View object
dKey	WriteDecorHandleKey for the decoration to be written through the view
ctx	EventContext

Returns

WriteDecorHandleKey (can be invalid)

Definition at line 293 of file ViewHelper.h.

  {
    // setProxyDict only supports non-const stores
    SG::View* nview ATLAS_THREAD_SAFE = const_cast< SG::View* >( view );
    auto handle = SG::makeHandle<T>(dKey, context );
    handle.setProxyDict( nview ).ignore();   // can never fail
    return handle;
  }

makeLink()

template<typename T>

ElementLink< T > ViewHelper::makeLink	(	const SG::View *	view,
		const SG::ReadHandle< T > &	handle,
		size_t	index )

Create EL to a collection in view.

Warning

no checks are made as to the validity of the created EL

Definition at line 309 of file ViewHelper.h.

  {
    auto proxy = view->proxy( handle.clid(), handle.key() );
    if ( proxy == nullptr ) throw std::runtime_error( "Attempting to make element link with invalid key " + handle.key() );
    return ElementLink<T>( proxy->name(), index );
  }

makeView()

SG::View * ViewHelper::makeView ( const std::string & common_name, int const unique_index = -1, bool const allowFallThrough = true )

inline

• unique_index - gets appended to the view name if >= 0

Definition at line 252 of file ViewHelper.h.

  {
    //Check for spaces in the name
    if ( common_name.find( ' ' ) != std::string::npos )
    {
      return nullptr;
    }
 
    return new SG::View( common_name, unique_index, allowFallThrough );
  }

scheduleSingleView()

StatusCode ViewHelper::scheduleSingleView ( SG::View * view, std::string const & nodeName, EventContext const & sourceContext, EventIDBase::number_type conditionsRun, SmartIF< IScheduler > scheduler )

inline

Definition at line 67 of file ViewHelper.h.

  {
    //Make a new context with the view attached
    auto viewContext = std::make_unique< EventContext >( sourceContext );
    if ( view->getROI().isValid() ) {
      Atlas::setExtendedEventContext( *viewContext,
                                      Atlas::ExtendedEventContext( view, conditionsRun, *view->getROI() ) );
    } else {
      Atlas::setExtendedEventContext( *viewContext,
                                      Atlas::ExtendedEventContext( view, conditionsRun ) );
    }
 
    //Attach the view to the named node
    return scheduler->scheduleEventView( &sourceContext, nodeName, std::move( viewContext ) );
  }

scheduleViews()

StatusCode ViewHelper::scheduleViews ( ViewContainer * viewVector, std::string const & nodeName, EventContext const & sourceContext, SmartIF< IScheduler > scheduler, bool reverseOrder = false )

inline

Definition at line 85 of file ViewHelper.h.

  {
    //Require the information of the extended context (should always be there, but check anyway)
    if ( !Atlas::hasExtendedEventContext( sourceContext ) ) {
      return StatusCode::FAILURE;
    }
    Atlas::ExtendedEventContext const extendedContext = Atlas::getExtendedEventContext( sourceContext );
 
    //Prevent view nesting - test if source context has view attached
    if ( dynamic_cast< SG::View* >( extendedContext.proxy() ) ) {
      return StatusCode::FAILURE;
    }
 
    //Retrieve the scheduler
    if ( !scheduler ) {
      return StatusCode::FAILURE;
    }
 
    if ( viewVector->empty() ) {
 
      //Disable the node if no views
      return scheduler->scheduleEventView( &sourceContext, nodeName, 0 );
    }
    else {
      if ( reverseOrder ) {
        for ( auto iter = viewVector->rbegin(); iter != viewVector->rend(); ++iter ) {
 
          //Schedule each view in reverse (should make no difference, just a debugging tool)
          if ( scheduleSingleView( *iter, nodeName, sourceContext,
                                   extendedContext.conditionsRun(), scheduler ).isFailure() ) {
            return StatusCode::FAILURE;
          }
        }
      }
      else {
        for ( SG::View* view : *viewVector ) {
 
          //Schedule each view
          if ( scheduleSingleView( view, nodeName, sourceContext,
                                   extendedContext.conditionsRun(), scheduler ).isFailure() ) {
            return StatusCode::FAILURE;
          }
        }
      }
    }
 
    return StatusCode::SUCCESS;
  }