1 /*
2 * $Id: NestedObjectExtractor.java 817009 2009-09-20 11:26:26Z apetrelli $
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 package org.apache.tiles.ognl;
23
24 /**
25 * Extracts an object using another object as a basis.
26 *
27 * @param <T> The type of the root object.
28 * @version $Rev: 817009 $ $Date: 2009-09-20 21:26:26 +1000 (Sun, 20 Sep 2009) $
29 * @since 2.2.0
30 */
31 public interface NestedObjectExtractor<T> {
32
33 /**
34 * Extracts the nested object.
35 *
36 * @param obj The root object.
37 * @return The extracted nested object.
38 * @since 2.2.0
39 */
40 Object getNestedObject(T obj);
41 }