@Override
public RelationSchema getClone() {
RelationSchema clone;
ArrayList<Attribute> clonesAttributes = new ArrayList<>();
ArrayList<FunctionalDependency> clonesFunctionalDependencies = new ArrayList<>();
for (Attribute attribute : attributes) {
clonesAttributes.add((Attribute) attribute.getClone());
}
for (FunctionalDependency dependency : functionalDependencies) {
clonesFunctionalDependencies.add(dependency.getClone());
}
clone = new RelationSchema(name, clonesAttributes, clonesFunctionalDependencies);
clone.setOwnId(ownId);
clone.restoreReferences();
clone.initPropertyChangeListeners();
clone.setDirty(super.isDirty());
return clone;
}
public boolean addFunctionalDependency(FunctionalDependency dependency) {
for (FunctionalDependency fd : functionalDependencies) {
if (fd.equals(dependency)) {
return false;
}
}
changeSupport.fireBeforeChange();
functionalDependencies.add(dependency);
changeSupport.fireAfterChange();
return true;
}
public void updateFunctionalDependencies() {
ArrayList<FunctionalDependency> toDelete = new ArrayList<>();
for (FunctionalDependency fd : functionalDependencies) {
cleanReferences(fd.getSourceAttributes());
cleanReferences(fd.getTargetAttributes());
if (fd.getSourceAttributes().isEmpty() || fd.getTargetAttributes().isEmpty()) {
toDelete.add(fd);
}
}
for (FunctionalDependency fd : toDelete) {
removeFunctionalDependency(fd);
}
}
/**
* Restores the References between the FunctionalDependencies and the Attributes of the relation
*/
public void restoreReferences() {
for (FunctionalDependency fd : getFunctionalDependencies()) {
for (int i = 0; i < fd.getSourceAttributes().size(); i++) {
fd.getSourceAttributes()
.set(i, getAttributeByName(fd.getSourceAttributes().get(i).getName()));
}
for (int i = 0; i < fd.getTargetAttributes().size(); i++) {
fd.getTargetAttributes()
.set(i, getAttributeByName(fd.getTargetAttributes().get(i).getName()));
}
}
}