public synchronized void addIDataSetListenerIfAbsent(
IDataSetListener listener, String listenerId) {
Helper.checkNotNull(listener, "listener");
Helper.checkNotNullNotTrimNotEmpty(listenerId, "listenerId");
if (!listeners.containsKey(listenerId)) {
listeners.put(listenerId, listener);
}
}
protected DataStoreChangedEvent createEvent(
IDataStore prev, final IDataStore curr, IDataSet set) {
if (prev == null) {
return new DataStoreChangedEvent(
set,
curr,
curr,
getAllRecords(curr),
new ArrayList<IRecord>(0),
new ArrayList<IRecord>(0));
}
// prev!=null
Helper.checkNotNull(curr, "curr");
IMetaData prevMeta = prev.getMetaData();
IMetaData currMeta = curr.getMetaData();
Assert.assertNotNull(prevMeta, "prevMeta");
Assert.assertNotNull(currMeta, "currMeta");
int prevFieldIndex = prevMeta.getIdFieldIndex();
int currFieldIndex = currMeta.getIdFieldIndex();
if (prevFieldIndex == ID_NOT_DEFINED || currFieldIndex == ID_NOT_DEFINED) {
return new DataStoreChangedEvent(
set, prev, curr, getAllRecords(curr), new ArrayList<IRecord>(0), getAllRecords(prev));
}
List<IRecord> updated =
getUpdated(
prev,
new RecordIdRetriever() {
public IRecord getRecordById(Object id) {
return curr.getRecordByID(id);
}
},
prevFieldIndex);
List<IRecord> deleted = getDeleted(prev, curr, prevFieldIndex);
List<IRecord> added =
getAdded(
prev,
new RecordRetriever() {
public IRecord getRecord(int index) {
return curr.getRecordAt(index);
}
public int countRecords() {
return (int) curr.getRecordsCount();
}
},
prevFieldIndex);
DataStoreChangedEvent res = new DataStoreChangedEvent(set, prev, curr, added, updated, deleted);
return res;
}
public synchronized List<ListenerResult> changedDataSetUpdatedOrAdded(
final List<IRecord> updatedOrAdded, int idFieldIndex) {
Helper.checkNotNull(updatedOrAdded, "updatedOrAdded");
Helper.checkNotNegative(idFieldIndex, "idFieldIndex");
checkStateNotNull();
IDataStore prev = this.store;
// find added records
List<IRecord> added = getAdded(updatedOrAdded, idFieldIndex, prev);
// find updated records
List<IRecord> updated = getUpdated(updatedOrAdded, idFieldIndex, prev);
IDataStore curr = dataStoreCloner.clone(prev, added, new ArrayList<IRecord>(0), updated);
this.store = curr;
// use the current data set
DataStoreChangedEvent event = createEvent(prev, curr, this.dataSet);
List<ListenerResult> res = fireListeners(event);
return res;
}
public synchronized List<ListenerResult> changedDataSet(IDataSet currDataSet) {
Helper.checkNotNull(currDataSet, "currDataSet");
IDataStore prev = this.store;
IDataStore curr = currDataSet.getDataStore();
Assert.assertNotNull(curr, "curr!=null");
this.store = curr;
this.dataSet = currDataSet;
List<ListenerResult> res = fireListeners(createEvent(prev, curr, currDataSet));
return res;
}
private List<ListenerResult> fireListeners(DataStoreChangedEvent event) {
Helper.checkNotNull(event, "event");
List<ListenerResult> res = new ArrayList<ListenerResult>();
for (IDataSetListener l : listeners.values()) {
try {
l.dataStoreChanged(event);
res.add(new ListenerResult());
} catch (Exception e) {
res.add(new ListenerResult(e));
}
}
return res;
}
public synchronized List<ListenerResult> changedDataSet(List<IRecord> updated) {
Helper.checkNotNull(updated, "updated");
checkStateNotNull();
IDataStore prev = this.store;
IDataStore curr =
dataStoreCloner.clone(prev, new ArrayList<IRecord>(0), new ArrayList<IRecord>(0), updated);
this.store = curr;
// use the current data set
DataStoreChangedEvent event = createEvent(prev, curr, this.dataSet);
List<ListenerResult> res = fireListeners(event);
return res;
}
public synchronized boolean removeIDataSetListener(String listenerId) {
Helper.checkNotNullNotTrimNotEmpty(listenerId, "listenerId");
IDataSetListener res = listeners.remove(listenerId);
return res != null;
}
