no.digipost

Class DiggPredicates

java.lang.Object

no.digipost.DiggPredicates

public final class DiggPredicates
extends Object

Method Summary

Modifier and Type	Method and Description
static <T> Predicate<T>	nth(long n, Predicate<T> predicate) Create a new predicate which only yields true on the nth true-yielding invocation of a given predicate.

Methods inherited from class java.lang.Object

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

Method Detail

nth

public static <T> Predicate<T> nth(long n,
                                   Predicate<T> predicate)

Create a new predicate which only yields true on the nth true-yielding invocation of a given predicate.

As this is a stateful predicate, it should usually not be kept as a reference, but used inline when processing a number of elements, with streams.

Parameters:

n - the nth true-yielding invocation, 1 indicates first, 2 second, and so forth. 0 or less will throw an IllegalArgumentException.

predicate - the predicate.

Returns:

the new predicate.