byte[] cb) {
ResourceChangeSet pkgcs = new ResourceChangeSet( file, ChangeType.UPDATED );
ResourceType type = ResourceType.determineResourceType( file );
if( ResourceType.DRL.equals( type ) ) {
try {
PackageDescr opkg = new DrlParser().parse( new ByteArrayResource( ob ) );
PackageDescr cpkg = new DrlParser().parse( new ByteArrayResource( cb ) );
List<RuleDescr> orules = new ArrayList<RuleDescr>( opkg.getRules() ); // needs to be cloned
List<RuleDescr> crules = cpkg.getRules();
for( RuleDescr crd : crules ) {