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package com.fasterxml.jackson.databind.util;

import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * Implementation of {@link Iterator} for Empty collections.
 * While JDK has an implementation starting with 1.7, we need this
 * class until then.
 * 
 * @since 2.2 (before, we had embedded instances)
 */
public class EmptyIterator implements Iterator
{
    private final static EmptyIterator instance = new EmptyIterator();

    private EmptyIterator() { }

    @SuppressWarnings("unchecked")
    public static  Iterator instance() {
        return (Iterator) instance;
    }
    
    @Override
    public boolean hasNext() { return false; }
    @Override
    public T next() { throw new NoSuchElementException(); }

    @Override
    public void remove() {
        throw new UnsupportedOperationException();
    }
}
    

    

    

            

    

            



    
    






    
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