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