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/*
 * MIT License
 *
 * Copyright (c) 2020 Udo Borkowski, ([email protected])
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package org.abego.commons.util;

import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.function.IntFunction;

public class IteratorUsingAccessor implements Iterator {

    private final int size;
    private final IntFunction accessor;
    private int i = 0;

    private IteratorUsingAccessor(int size, IntFunction accessor) {
        this.size = size;
        this.accessor = accessor;
    }

    public static  IteratorUsingAccessor newIteratorUsingAccessor(
            int size, IntFunction accessor) {
        return new IteratorUsingAccessor<>(size, accessor);
    }

    @Override
    public boolean hasNext() {
        return i < size;
    }

    @Override
    public E next() {
        if (!hasNext())
            throw new NoSuchElementException();

        return accessor.apply(i++);
    }
}