aQute.launcher.minifw.Enumerations Maven / Gradle / Ivy
package aQute.launcher.minifw;
import static java.util.Objects.requireNonNull;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Spliterator;
import java.util.Spliterators.AbstractSpliterator;
import java.util.function.Consumer;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
public class Enumerations implements Enumeration {
private final Iterator iterator;
public static Enumeration enumeration(Stream stream) {
return new Enumerations<>(stream.iterator());
}
public static Enumeration enumeration(Iterable iterable) {
return new Enumerations<>(iterable.iterator());
}
public static Stream stream(Enumeration enumeration) {
return StreamSupport.stream(new AbstractSpliterator(Long.MAX_VALUE, Spliterator.ORDERED) {
@Override
public void forEachRemaining(Consumer action) {
requireNonNull(action);
while (enumeration.hasMoreElements()) {
action.accept(enumeration.nextElement());
}
}
@Override
public boolean tryAdvance(Consumer action) {
requireNonNull(action);
if (enumeration.hasMoreElements()) {
action.accept(enumeration.nextElement());
return true;
}
return false;
}
}, false);
}
private Enumerations(Iterator iterator) {
this.iterator = iterator;
}
@Override
public boolean hasMoreElements() {
return iterator.hasNext();
}
@Override
public E nextElement() {
return iterator.next();
}
}