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1   /*
2    * Copyright 1999-2004 The Apache Software Foundation
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.jxpath.servlet;
17  
18  import java.util.ArrayList;
19  import java.util.Enumeration;
20  
21  import org.apache.commons.jxpath.DynamicPropertyHandler;
22  
23  /***
24   * Implementation of the DynamicPropertyHandler interface that provides
25   * access to attributes of a PageScopeContext.
26   *
27   * @author Dmitri Plotnikov
28   * @version $Revision: 1.6 $ $Date: 2004/05/08 15:10:49 $
29   */
30  public class PageScopeContextHandler implements DynamicPropertyHandler {
31      
32      private static final String[] STRING_ARRAY = new String[0];
33  
34      public String[] getPropertyNames(Object pageScope) {
35          Enumeration e = ((PageScopeContext) pageScope).getAttributeNames();
36          ArrayList list = new ArrayList(16);
37          while (e.hasMoreElements()) {
38              list.add(e.nextElement());
39          }
40          return (String[]) list.toArray(STRING_ARRAY);
41      }
42  
43      public Object getProperty(Object pageScope, String property) {
44          return ((PageScopeContext) pageScope).getAttribute(property);
45      }
46  
47      public void setProperty(Object pageScope, String property, Object value) {
48          ((PageScopeContext) pageScope).setAttribute(property, value);
49      }
50  }