Example usage for org.apache.commons.lang3.mutable MutableLong toLong

Introduction

In this page you can find the example usage for org.apache.commons.lang3.mutable MutableLong toLong.

Prototype

public Long toLong() 

Source Link

Document

Gets this mutable as an instance of Long.

Usage

From source file:enumj.Reversible.java

/**
 * Applies a {@code Enumerator.map(BiFunction)} operation
 * upon {@code source}, in reverse if necessary.
 *
 * @param <E> type of unmapped enumerated elements.
 * @param <R> type of mapped enumerated elements.
 * @param source {@link Enumerator} to apply the operation on.
 * @param mapper {@link BiFunction} to apply.
 * @param reversed true if the operation is applied in reverse,
 * false otherwise.//from   w  ww  .jav  a2 s .  c  o  m
 * @return mapped {@code Enumerator}.
 */
static <E, R> Enumerator<R> map(Enumerator<E> source, BiFunction<? super E, ? super Long, ? extends R> mapper,
        boolean reversed) {
    Checks.ensureNotNull(mapper, Messages.NULL_ENUMERATOR_MAPPER);
    final MutableLong index = new MutableLong(0);
    final Function<E, R> fun = e -> {
        final R result = mapper.apply(e, index.toLong());
        index.increment();
        return result;
    };
    if (reversed) {
        final PipeEnumerator pipe = (PipeEnumerator) source;
        return pipe.reversedMap(fun);
    }
    return source.map(fun);
}

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