/**
* Creates a SymmetryElement from a SymmetryOperation
*
* As detailed in the class description, the method checks whether there is
* already a prototype SymmetryElement for the provided SymmetryOperation. If
* not, it tries to find an appropriate generator and uses that to create
* the prototype. Then it returns a clone of the prototype.
*
* @param operation :: SymmetryOperation for which to generate the element.
* @return SymmetryElement for the supplied operation.
*/
SymmetryElement_sptr SymmetryElementFactoryImpl::createSymElement(
const SymmetryOperation &operation) {
std::string operationIdentifier = operation.identifier();
SymmetryElement_sptr element = createFromPrototype(operationIdentifier);
if (element) {
return element;
}
AbstractSymmetryElementGenerator_sptr generator = getGenerator(operation);
if (!generator) {
throw std::runtime_error("Could not process symmetry operation '" +
operationIdentifier + "'.");
}
insertPrototype(operationIdentifier, generator->generateElement(operation));
return createFromPrototype(operationIdentifier);
}
