org.nuxeo.common.utils

Class BatchUtils

java.lang.Object

org.nuxeo.common.utils.BatchUtils

public class BatchUtils
extends Object

Batching utilities.

Since:

10.10

Method Summary

Modifier and Type	Method and Description
static <T,U> List<org.apache.commons.lang3.tuple.Pair<U,List<T>>>	groupByDerived(List<T> values, Function<T,U> deriver, BiPredicate<U,U> comparator) Takes the input values and batches them together in groups.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

groupByDerived

public static <T,U> List<org.apache.commons.lang3.tuple.Pair<U,List<T>>> groupByDerived(List<T> values,
                                                                                        Function<T,U> deriver,
                                                                                        BiPredicate<U,U> comparator)

Takes the input values and batches them together in groups. All values in a given group have the same derived value. The derived value is computed using the deriver function. Two derived values are compared for equality using the comparator.

Type Parameters:

T - the type of the values

U - the type of the derived values

Parameters:

values - the input values

deriver - the function to compute a derived value

comparator - the equality test for derived values

Returns:

a list of pairs with a derived values and the corresponding batch

Since:

10.10