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.commons.jxpath.servlet;
18
19 import java.util.ArrayList;
20 import java.util.Enumeration;
21
22 import org.apache.commons.jxpath.DynamicPropertyHandler;
23
24 /**
25 * Implementation of the {@link DynamicPropertyHandler} interface that provides
26 * access to attributes of a {@link PageScopeContext}.
27 *
28 * @author Dmitri Plotnikov
29 * @version $Revision: 652845 $ $Date: 2008-05-02 13:46:46 -0400 (Fri, 02 May 2008) $
30 */
31 public class PageScopeContextHandler implements DynamicPropertyHandler {
32
33 private static final int DEFAULT_LIST_SIZE = 16;
34
35 public String[] getPropertyNames(Object pageScope) {
36 Enumeration e = ((PageScopeContext) pageScope).getAttributeNames();
37 ArrayList list = new ArrayList(DEFAULT_LIST_SIZE);
38 while (e.hasMoreElements()) {
39 list.add(e.nextElement());
40 }
41 return (String[]) list.toArray(new String[list.size()]);
42 }
43
44 public Object getProperty(Object pageScope, String property) {
45 return ((PageScopeContext) pageScope).getAttribute(property);
46 }
47
48 public void setProperty(Object pageScope, String property, Object value) {
49 ((PageScopeContext) pageScope).setAttribute(property, value);
50 }
51 }