unmodifiablebidirectionaliterator.java

来自「java 的源代码」· Java 代码 · 共 69 行

package com.reddragon2046.base.utilities.data.adapters;

import com.reddragon2046.base.utilities.data.BidirectionalIterator;
import com.reddragon2046.base.utilities.data.ForwardIterator;
import java.util.ListIterator;

// Referenced classes of package com.reddragon2046.base.utilities.data.adapters:
//            UnmodifiableForwardIterator, UnmodifiableIterator

public class UnmodifiableBidirectionalIterator extends UnmodifiableForwardIterator
    implements BidirectionalIterator
{

    protected UnmodifiableBidirectionalIterator(BidirectionalIterator i)
    {
        super(i);
    }

    protected BidirectionalIterator biIterator()
    {
        return (BidirectionalIterator)iterator();
    }

    public Object clone()
    {
        return new UnmodifiableBidirectionalIterator((BidirectionalIterator)biIterator().clone());
    }

    public void retreat()
    {
        biIterator().retreat();
    }

    public void retreat(int n)
    {
        biIterator().retreat(n);
    }

    public boolean hasPrevious()
    {
        return biIterator().hasPrevious();
    }

    public Object previous()
    {
        return biIterator().previous();
    }

    public int nextIndex()
    {
        return biIterator().nextIndex();
    }

    public int previousIndex()
    {
        return biIterator().previousIndex();
    }

    public void add(Object obj)
    {
        throw new UnsupportedOperationException();
    }

    public void set(Object obj)
    {
        throw new UnsupportedOperationException();
    }
}