/**
* Checks if the pairs obtained from the Cartesian product of transactions and items are contained
*
* @param trans the transaction
* @param items collection of items
* @return <code>true</code> if the pairs set set has been changed
*/
public boolean containsAll(T trans, Collection<I> items) {
if (trans == null || items == null || items.isEmpty()) return true;
if (isEmpty()) return false;
return matrix.containsAll(transactionToIndex(trans), allItems.convert(items).indices());
}
/**
* Checks if the pairs obtained from the Cartesian product of transactions and items are contained
*
* @param trans collection of transactions
* @param item the item
* @return <code>true</code> if the pairs set set has been changed
*/
public boolean containsAll(Collection<T> trans, I item) {
if (trans == null || trans.isEmpty() || item == null) return true;
if (isEmpty()) return false;
return matrix.containsAll(allTransactions.convert(trans).indices(), itemToIndex(item));
}
/** {@inheritDoc} */
@Override
public boolean containsAll(Collection<?> c) {
return matrix.containsAll(convert(c).matrix);
}
