/**
* Load data via the proxy, and pump the records into the store
*
* @throws Exception
*/
public ObservableFuture<Void> load() throws Exception {
if (lastLoadingFuture != null) {
// cancel the old ones.
lastLoadingFuture.cancel();
lastProxyLoadingFuture.cancel();
}
// this might take a long time.
// unfortunately i can't sync during it.
// but this means that after a LOAD operation is requested,
// any adds that someone does will be overridden by the proxy.load() return value.
// note: unfortunately this is synchronous.
lastProxyLoadingFuture = proxy.load();
lastLoadingFuture = new DefaultObservableFuture<Void>(this);
// listen for completion of this future.
lastProxyLoadingFuture.addObserver(onLoadCompleteCallback);
// this whitespace might be all it takes to miss a callback, so we have to listen first, check
// second.
if (handleImmediatelyDone(lastProxyLoadingFuture, lastLoadingFuture)) {
lastProxyLoadingFuture.removeObserver(onLoadCompleteCallback);
}
return lastLoadingFuture;
}
public void copy() {
if (realData == null) {
realData = new RealData(idx);
for (int i = 0; i < idx; i++) {
realData.set(i, proxy.get(i));
}
}
}
public CopyWriteProxy(DataProxy dataProxy) {
super(dataProxy.size());
this.proxy = dataProxy;
}
@Override
public int get(int idx) {
return realData == null ? proxy.get(idx) : super.get(idx);
}
