/*
 * Copyright (c) 2007, 2018 Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2002 International Business Machines Corp. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.ts.tests.jaxrpc.common;

import com.sun.ts.lib.util.*;
import com.sun.ts.lib.porting.*;

import java.util.Iterator;
import java.util.NoSuchElementException;
import java.lang.UnsupportedOperationException;
import java.lang.IllegalStateException;

/**
 * An Iterator on a single element collection.
 */
public class SingleElementIterator implements Iterator {
  protected boolean hasNext = false;

  protected Object element;

  public SingleElementIterator() {
  }

  public SingleElementIterator(Object element) {
    this.element = element;
    hasNext = true;
  }

  public boolean hasNext() {
    return hasNext;
  }

  public Object next() throws NoSuchElementException {
    if (!hasNext) {
      throw new NoSuchElementException(
          "No elements left in SingleElementIterator next()");
    }
    hasNext = false;
    return element;
  }

  public void remove()
      throws UnsupportedOperationException, IllegalStateException {
    throw new UnsupportedOperationException(
        "SingleElementIterator does not support remove()");
  }
}
