package org.litesoft.sequences;

import java.util.*;

public abstract class SequenceBlock
{
    abstract public long getCurBlockEndExclusive();

    abstract public long available();

    abstract public boolean hasMore();

    abstract public long next()
            throws NoSuchElementException;

    abstract protected Long peekNext();

    public String toString()
    {
        return "Next: " + peekNext() + " for " + available();
    }
}