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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  package org.apache.portals.bridges.jsf;
    18
    19  import java.util.Iterator;
    20  import java.util.NoSuchElementException;
    21
    22  /***
    23   * <p>
    24   * Iterator without elements.
    25   * </p>
    26   * <p>
    27   * Code borrowed from myfaces.
    28   * </p>
    29   */
    30  public final class NullIterator implements Iterator
    31  {
    32      private static final NullIterator INSTANCE = new NullIterator();
    33
    34      public static final Iterator instance()
    35      {
    36          return INSTANCE;
    37      }
    38
    39      public boolean hasNext()
    40      {
    41          return false;
    42      }
    43
    44      public Object next()
    45      {
    46          throw new NoSuchElementException();
    47      }
    48
    49      public void remove()
    50      {
    51          throw new UnsupportedOperationException(this.getClass().getName() + " UnsupportedOperationException");
    52      }
    53  }