SourceWithOnDemandProperties.cpp

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#include "ElementsKernel/Logging.h"
 
#include "SEFramework/Task/TaskProvider.h"
#include "SEFramework/Task/SourceTask.h"
#include "SEFramework/Property/PropertyNotFoundException.h"
 
#include "SEFramework/Source/SourceWithOnDemandProperties.h"
 
namespace SourceXtractor {
 
static Elements::Logging logger = Elements::Logging::getLogger("SourceWithOnDemandProperties");
 
SourceWithOnDemandProperties::SourceWithOnDemandProperties(std::shared_ptr<const TaskProvider> task_provider) :
            m_task_provider(task_provider) {
}
 
const Property& SourceWithOnDemandProperties::getProperty(const PropertyId& property_id) const {
  // if we have the property already, just return it
  if (m_property_holder.isPropertySet(property_id)) {
    return m_property_holder.getProperty(property_id);
  }
 
  try {
    // if not, get the task that makes it and execute, we should have it then
    auto task = m_task_provider->getTask<SourceTask>(property_id);
    if (task) {
      task->computeProperties(const_cast<SourceWithOnDemandProperties&>(*this));
      return m_property_holder.getProperty(property_id);
    }
  }
  catch (Elements::Exception& e) {
    logger.debug() << e.what();
  }
 
  // no task available to make the property, just throw an exception
  throw PropertyNotFoundException(property_id);
}
 
void SourceWithOnDemandProperties::setProperty(std::unique_ptr<Property> property, const PropertyId& property_id) {
  // just forward to the ObjectWithProperties implementation
  m_property_holder.setProperty(std::move(property), property_id);
}
 
 
} // SEFramework namespace