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The MyFaces Commons Subproject provides base classes for usage in both the MyFaces implementation and the MyFaces Tomahawk components. This is also a general set of utility classes for usage in your JSF projects independent of the implementation you might be deciding upon.

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/*
 * Copyright 2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.myfaces.util;

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


/**
 * Iterator without elements
 *
 * @author Anton Koinov (latest modification by $Author: grantsmith $)
 * @version $Revision: 169655 $ $Date: 2005-05-11 16:45:06 +0000 (Wed, 11 May 2005) $
 */
public final class NullIterator implements Iterator
{
    //~ Static fields/initializers -----------------------------------------------------------------

    private static final NullIterator INSTANCE = new NullIterator();

    //~ Methods ------------------------------------------------------------------------------------

    public static final Iterator instance()
    {
        return INSTANCE;
    }

    public boolean hasNext()
    {
        return false;
    }

    public Object next()
    {
        throw new NoSuchElementException();
    }

    public void remove()
    {
        throw new UnsupportedOperationException(this.getClass().getName() + " UnsupportedOperationException");
    }
}