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
18 package org.apache.commons.jxpath.servlet;
19
20 import java.util.ArrayList;
21 import java.util.Enumeration;
22
23 import org.apache.commons.jxpath.DynamicPropertyHandler;
24
25 /**
26 * Implementation of the {@link DynamicPropertyHandler} interface that provides access to attributes of a {@link PageScopeContext}.
27 */
28 public class PageScopeContextHandler implements DynamicPropertyHandler {
29
30 private static final int DEFAULT_LIST_SIZE = 16;
31
32 /**
33 * Constructs a new instance.
34 */
35 public PageScopeContextHandler() {
36 // empty
37 }
38
39 @Override
40 public Object getProperty(final Object pageScope, final String property) {
41 return ((PageScopeContext) pageScope).getAttribute(property);
42 }
43
44 @Override
45 public String[] getPropertyNames(final Object pageScope) {
46 final Enumeration<String> e = ((PageScopeContext) pageScope).getAttributeNames();
47 final ArrayList<String> list = new ArrayList<>(DEFAULT_LIST_SIZE);
48 while (e.hasMoreElements()) {
49 list.add(e.nextElement());
50 }
51 return list.toArray(new String[list.size()]);
52 }
53
54 @Override
55 public void setProperty(final Object pageScope, final String property, final Object value) {
56 ((PageScopeContext) pageScope).setAttribute(property, value);
57 }
58 }