static SortedSet<Upgradeable> getDistributedUpgrades(int versionFrom, FSConstants.NodeType type)
throws IOException {
assert FSConstants.LAYOUT_VERSION <= versionFrom
: "Incorrect version " + versionFrom + ". Expected to be <= " + FSConstants.LAYOUT_VERSION;
SortedSet<Upgradeable> upgradeObjects = new TreeSet<Upgradeable>();
for (UOSignature sig : upgradeTable) {
if (sig.getVersion() < FSConstants.LAYOUT_VERSION) continue;
if (sig.getVersion() > versionFrom) break;
if (sig.getType() != type) continue;
upgradeObjects.add(sig.instantiate());
}
if (upgradeObjects.size() == 0) return null;
return upgradeObjects;
}
