/** Returns the map of oids to object datas for the given least-derived type. */
private Map getMap(ClassMetaData meta) {
Map m = (Map) _metaOidMaps.get(meta);
if (m != null) return m;
// load datas from file and cache them
Collection datas = _conf.getFileHandler().load(meta);
m = new HashMap(datas.size());
for (Iterator itr = datas.iterator(); itr.hasNext(); ) {
ObjectData data = (ObjectData) itr.next();
m.put(data.getId(), data);
}
_metaOidMaps.put(meta, m);
return m;
}
/**
* End the datastore transaction.
*
* @param updates {@link ObjectData} instances to insert or update
* @param deletes {@link ObjectData} instances to delete
*/
public synchronized void endTransaction(Collection updates, Collection deletes) {
// track dirty types
Set dirty = new HashSet();
try {
// commit updates
if (updates != null) {
for (Iterator itr = updates.iterator(); itr.hasNext(); ) {
ObjectData data = (ObjectData) itr.next();
ClassMetaData meta = getLeastDerived(data.getMetaData());
getMap(meta).put(data.getId(), data);
dirty.add(meta);
}
}
// commit deletes
if (deletes != null) {
for (Iterator itr = deletes.iterator(); itr.hasNext(); ) {
ObjectData data = (ObjectData) itr.next();
ClassMetaData meta = getLeastDerived(data.getMetaData());
getMap(meta).remove(data.getId());
dirty.add(meta);
}
}
// write changes to dirty extents back to file
XMLFileHandler fh = _conf.getFileHandler();
for (Iterator itr = dirty.iterator(); itr.hasNext(); ) {
ClassMetaData meta = (ClassMetaData) itr.next();
fh.store(meta, getMap(meta).values());
}
} finally {
// unlock store
notify();
_locked = false;
}
}
/**
* Creates an instance of {@link AbstractInternalContext}. The internal context is meant to hold
* the configuration and state informations, but not necessarily retrieving those values...
*/
public AbstractInternalContext() {
_configuration = XMLConfiguration.newInstance();
_javaNaming = new JavaNamingImpl();
}
