001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.commons.jxpath;
018    
019    import java.io.Serializable;
020    
021    /**
022     * A Container is an object implementing an indirection
023     * mechanism transparent to JXPath.  For example, if property
024     * "foo" of the context node has a Container as its value,
025     * the XPath "foo" will produce the contents of that Container,
026     * rather than the container itself.
027     *
028     * @author Dmitri Plotnikov
029     * @version $Revision: 652925 $ $Date: 2008-05-02 17:05:41 -0500 (Fri, 02 May 2008) $
030     */
031    public interface Container extends Serializable {
032    
033        /**
034         * Returns the contained value.
035         * @return Object value
036         */
037        Object getValue();
038    
039        /**
040         * Modifies the value contained by this container.  May throw
041         * UnsupportedOperationException.
042         * @param value Object value to set.
043         */
044        void setValue(Object value);
045    }