001    package org.apache.commons.ognl;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one
005     * or more contributor license agreements.  See the NOTICE file
006     * distributed with this work for additional information
007     * regarding copyright ownership.  The ASF licenses this file
008     * to you under the Apache License, Version 2.0 (the
009     * "License"); you may not use this file except in compliance
010     * with the License.  You may obtain a copy of the License at
011     *
012     *   http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing,
015     * software distributed under the License is distributed on an
016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017     * KIND, either express or implied.  See the License for the
018     * specific language governing permissions and limitations
019     * under the License.
020     */
021    
022    import java.util.Enumeration;
023    
024    /**
025     * Implementation of ElementsAccessor that returns a single-element iterator, containing the original target object.
026     * 
027     * @author Luke Blanshard (blanshlu@netscape.net)
028     * @author Drew Davidson (drew@ognl.org)
029     */
030    public class ObjectElementsAccessor
031        implements ElementsAccessor
032    {
033        /**
034         * {@inheritDoc}
035         */
036        public Enumeration<?> getElements( Object target )
037        {
038            final Object object = target;
039    
040            return new Enumeration<Object>()
041            {
042                private boolean seen = false;
043    
044                public boolean hasMoreElements()
045                {
046                    return !seen;
047                }
048    
049                public Object nextElement()
050                {
051                    Object result = null;
052    
053                    if ( !seen )
054                    {
055                        result = object;
056                        seen = true;
057                    }
058                    return result;
059                }
060            };
061        }
062    }