/** {@inheritDoc} */
@Override
public int hashCode() {
// Allow for multiple hash calculations to avoid
// synchronization cost. Note that array of IDs don't change.
if (hash == Integer.MIN_VALUE) hash = ids.hashCode();
return hash;
}
/**
* Creates node predicate that evaluates to {@code true} for all provided nodes. Implementation
* will make a defensive copy.
*
* @param nodes Optional grid nodes. If none provided - predicate will always return {@code
* false}.
*/
public GridNodePredicate(@Nullable GridNode... nodes) {
if (F.isEmpty(nodes)) ids = Collections.emptySet();
else if (nodes.length == 1) ids = Collections.singleton(nodes[0].id());
else {
ids = new HashSet<>(nodes.length);
for (GridNode n : nodes) ids.add(n.id());
}
}
/** {@inheritDoc} */
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof GridNodePredicate)) return false;
GridNodePredicate it = (GridNodePredicate) o;
return ids.equals(it.ids);
}
/** {@inheritDoc} */
@Override
public boolean apply(GridNode n) {
assert n != null;
return ids.contains(n.id());
}
/** {@inheritDoc} */
@Override
public Iterator<UUID> iterator() {
return ids.iterator();
}