public void cancel(Handle h) {
if (h != null) {
if (!(h instanceof ExecuteHandle)) {
throw new IllegalArgumentException();
}
ExecuteHandle handle = (ExecuteHandle) h;
Object entity = handle.entity;
Executable e = handle.e;
Handle subHandle = handle.handle;
Synchronizer synchronizer = getSynchronizer(entity, e);
synchronizer.cancel(subHandle);
}
}
public void cancel(Handle h) {
if (resource != null) {
resource.cancel(h);
}
}