IntIterate.java

package com.annimon.stream.operator;

import com.annimon.stream.function.IntUnaryOperator;
import com.annimon.stream.iterator.PrimitiveIterator;

public class IntIterate extends PrimitiveIterator.OfInt {

    private final IntUnaryOperator op;
    private int current;

    public IntIterate(int seed, IntUnaryOperator f) {
        this.op = f;
        current = seed;
    }

    @Override
    public boolean hasNext() {
        return true;
    }

    @Override
    public int nextInt() {
        final int old = current;
        current = op.applyAsInt(current);
        return old;
    }
}