public <V extends EvolutionNode> EvolutionPolicy<V> get(EventType eventType /*, V eventNode*/) {
for (EvolutionPolicy<V> u : this) {
if (u.getSourceEvent().getEventType()
== eventType /* && u.getSourceEvent().getEventNode().equals(eventNode )*/) {
return u;
}
}
return null;
}
public void exportPoliciesToFile(File file) {
try {
BufferedWriter out = new BufferedWriter(new FileWriter(file));
for (V v : this.getVertices()) {
for (EvolutionPolicy<V> p : v.getPolicies()) {
out.write(v + ": " + p.toString() + ";");
out.newLine();
}
}
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/*
* gets the prevailing policy in a module (e.g. a query, relation, view)
*/
private PolicyType getPrevailingPolicy(
EvolutionEvent<V> event, V nr, PolicyType previousPolicyType) {
EvolutionPolicies policies = nr.getPolicies();
// if policy for this event exist override previousPolicy coming from provider node
for (EvolutionPolicy<V> nrPolicy : policies) {
if ((nrPolicy.getSourceEvent().getEventNode().equals(event.getEventNode()))
&& (nrPolicy.getSourceEvent().getEventType() == event.getEventType())) {
return nrPolicy.getPolicyType();
}
}
// If no policy is returned check parents' policy for this event to override provider's policy
if (this.getParentNode(nr) != null) {
EvolutionEvent<V> newEvent = new EvolutionEvent<V>(/*nr,*/ event.getEventType());
return getPrevailingPolicy(newEvent, this.getParentNode(nr), previousPolicyType);
}
// if no self or parents policy exists then return provider's policy
return previousPolicyType;
}
