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package org.codehaus.stax2.ri;

import java.util.Iterator;

/**
 * Simple read-only iterator that iterators over one specific item, passed
 * in as constructor argument.
 */
public class SingletonIterator
    implements Iterator
{
    private final Object mValue;
    
    private boolean mDone = false;
    
    public SingletonIterator(Object value) {
        mValue = value;
    }
    
    public boolean hasNext() {
        return !mDone;
    }
    
    public Object next() {
        if (mDone) {
            throw new java.util.NoSuchElementException();
        }
        mDone = true;
        return mValue;
    }
    
    public void remove()
    {
        throw new UnsupportedOperationException("Can not remove item from SingletonIterator.");
    }
}