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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  }