@Override
public void execute(DataContainer dataContainer) {
Data currentData = dataContainer.getData();
TransactionManager transactionManager = dataContainer.getTransactionManager();
// get old value and decrement it's count
String oldValue = currentData.getKeyValue(name);
if (oldValue == null) {
oldValue = transactionManager.getMostRecentValueForKey(name);
}
if (oldValue != null) {
Integer decrementedOccurrenceCount =
getOccurrenceCountFromAllTransaction(oldValue, dataContainer) - 1;
currentData.setValueCount(oldValue, decrementedOccurrenceCount);
}
// delete and mark key as deleted
currentData.unsetKey(name);
System.out.println();
}
