@Override
public void clear() {
for (Index i : index) {
storage.removeItem(getId(i.getId()));
}
index.clear();
updateIndex();
}
@Override
public void delete(long key) {
for (Index i : index) {
if (i.getId() == key) {
index.remove(i);
storage.removeItem(getId(key));
updateIndex();
break;
}
}
}
private void updateIndex() {
Collections.sort(index, comparator);
DataOutput dataOutput = new DataOutput();
dataOutput.writeInt(index.size());
for (Index i : index) {
dataOutput.writeLong(i.getId());
dataOutput.writeLong(i.getSortKey());
}
storage.setItem("list_" + prefix + "_index", toBase64(dataOutput.toByteArray()));
}
@Override
public void updateOrAdd(ListEngineRecord record) {
// Update Index
for (Index i : index) {
if (i.getId() == record.getKey()) {
index.remove(i);
break;
}
}
index.add(new Index(record.getKey(), record.getOrder()));
updateIndex();
// Save record
storage.setItem(getId(record.getKey()), toBase64(record.getData()));
}
@Override
public ListEngineRecord loadItem(long key) {
Index indexValue = null;
for (Index i : index) {
if (i.getId() == key) {
indexValue = i;
break;
}
}
if (indexValue == null) {
return null;
}
String item = storage.getItem(getId(key));
if (item != null) {
byte[] res = fromBase64(item);
return new ListEngineRecord(key, indexValue.getSortKey(), null, res);
}
return null;
}
