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Collectors.java
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36 lines (30 loc) · 889 Bytes
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package fj.data;
import java.util.stream.Collector;
public final class Collectors {
private Collectors() {
}
public static <A> Collector<A, List.Buffer<A>, List<A>> toList() {
return Collector.of(
List.Buffer::new,
List.Buffer::snoc,
(acc1, acc2) -> acc1.append(acc2.toList()),
List.Buffer::toList
);
}
public static <A> Collector<A, List.Buffer<A>, Array<A>> toArray() {
return Collector.of(
List.Buffer::new,
List.Buffer::snoc,
(acc1, acc2) -> acc1.append(acc2.toList()),
(buf) -> Array.iterableArray(buf.toList())
);
}
public static <A> Collector<A, List.Buffer<A>, Stream<A>> toStream() {
return Collector.of(
List.Buffer::new,
List.Buffer::snoc,
(acc1, acc2) -> acc1.append(acc2.toList()),
(buf) -> Stream.iterableStream(buf.toList())
);
}
}