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/*
* esodata - data structures and other things, of varying utility
* Copyright 2022, Ben Culkin
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
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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