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package bjc.data;
import java.util.Iterator;
import java.util.function.Function;
/**
* An iterator that transforms values from one type to another.
*
* @author EVE
*
* @param <S>
* The source iterator type.
*
* @param <D>
* The destination iterator type.
*/
public class TransformIterator<S, D> implements Iterator<D> {
/* Our source of values. */
private final Iterator<S> source;
/* Transform function. */
private final Function<S, D> transform;
/**
* Create a new transform iterator.
*
* @param source
* The source iterator to use.
*
* @param transform
* The transform to apply.
*/
public TransformIterator(final Iterator<S> source, final Function<S, D> transform) {
this.source = source;
this.transform = transform;
}
@Override
public boolean hasNext() {
return source.hasNext();
}
@Override
public D next() {
return transform.apply(source.next());
}
}
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