/**
* Weaves two directly dependent aspects together (single weave). Weaves the structural view and
* copies the message and states view of the lower-level to the higher-level aspect.
*
* @param base the aspect to weave into (higher-level aspect)
* @param instantiation the instantiation for the lower-level aspect
* @return the woven aspect which resulted from weaving the lower-level into the higher-level
* aspect
*/
public Aspect weaveSingle(Aspect base, Instantiation instantiation) {
weavingInformation.clear();
Aspect result = loadNewInstance(base);
// Get the instantiation from the new instance, because the parameter
// refers to the instantiation of base.
int index = base.getInstantiations().indexOf(instantiation);
Instantiation actualInstantiation = result.getInstantiations().get(index);
doWeaveSingle(result, actualInstantiation);
return result;
}
/**
* Performs the step of a single weave. The lower-level aspect from the instantiation is woven
* into the given aspect.
*
* @param base the higher-level aspect the lower-level aspect is woven into
* @param instantiation the lower-level aspect to weave into the base aspect
*/
public void doWeaveSingle(Aspect base, Instantiation instantiation) {
System.out.println(
"Weaving " + instantiation.getSource().getName() + " into " + base.getName());
StructuralViewWeaver structuralViewWeaver = StructuralViewWeaver.getInstance();
for (COREModelReuse modelReuse : instantiation.getSource().getModelReuses()) {
COREModelReuse copy = EcoreUtil.copy(modelReuse);
base.getModelReuses().add(copy);
}
// CHECKSTYLE:IGNORE ParameterAssignment FOR 2 LINES: Needed, because the operation returns the
// result,
// however it returns base.
base = structuralViewWeaver.weave(base, instantiation);
WeavingInformation currentWeavingInformation = structuralViewWeaver.getWeavingInformation();
// Update the model reuses.
ReferenceUpdater.getInstance().update(base.getModelReuses(), currentWeavingInformation);
createTrace(base, instantiation.getSource(), currentWeavingInformation);
// Merge weaving information, to be able to look at woven elements later.
this.weavingInformation.merge(currentWeavingInformation);
messageViewWeaver.copyMessageViews(base, instantiation.getSource(), currentWeavingInformation);
StateViewWeaverUtils.copyStateViews(base, instantiation.getSource(), currentWeavingInformation);
base.getInstantiations().remove(instantiation);
}
/**
* Weaves the complete hierarchy in a top-down manner with the exception that no state and message
* views are woven. This means, state and message views are only copied.
*
* @param aspect the aspect of which all dependent aspects should be woven into
* @return a woven aspect (copy) with no dependencies (all dependent aspects are woven into it)
* @see #weaveAllTopDown(Aspect)
* @see #weaveSingle(Aspect, Instantiation)
*/
public Aspect weaveAllSingle(Aspect aspect) {
weavingInformation.clear();
Aspect result = loadNewInstance(aspect);
while (!result.getInstantiations().isEmpty()) {
// Get the first level of instantiations for this aspect ...
List<Instantiation> currentLevel = new ArrayList<Instantiation>(result.getInstantiations());
// Weave only the first level ...
for (Instantiation instantiation : currentLevel) {
doWeaveSingle(result, instantiation);
}
}
return result;
}
/**
* Resolves dependencies of the given aspect from the bottom (of the dependency hierarchy) up. For
* each two aspects, a single weave is performed (only structure is woven, rest is copied over).
*
* @param aspect the aspect to resolve dependencies for
* @see #weaveAllBottomUp(Aspect)
*/
private void resolveDependenciesBottomUp(Aspect aspect) {
// Create a copy of the instantiations to evade a concurrent modification,
// when instantiations are removed in doWeaveSingle.
List<Instantiation> instantiations = new ArrayList<Instantiation>(aspect.getInstantiations());
for (Instantiation instantiation : instantiations) {
// Find the lowest aspect recursively ...
if (!instantiation.getSource().getInstantiations().isEmpty()) {
resolveDependenciesBottomUp(instantiation.getSource());
}
doWeaveSingle(aspect, instantiation);
}
}