01: /*
02: * Copyright 1999-2004 The Apache Software Foundation
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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.Enumeration;
19: import java.util.HashSet;
20:
21: import javax.servlet.http.HttpSession;
22:
23: import org.apache.commons.jxpath.JXPathException;
24:
25: /**
26: * Implementation of the DynamicPropertyHandler interface that provides
27: * access to attributes of a HttpSession.
28: *
29: * @author Dmitri Plotnikov
30: * @version $Revision: 1.6 $ $Date: 2004/05/08 15:10:49 $
31: */
32: public class HttpSessionHandler extends ServletContextHandler {
33:
34: protected void collectPropertyNames(HashSet set, Object bean) {
35: HttpSessionAndServletContext handle = (HttpSessionAndServletContext) bean;
36: super .collectPropertyNames(set, handle.getServletContext());
37: HttpSession session = handle.getSession();
38: if (session != null) {
39: Enumeration e = session.getAttributeNames();
40: while (e.hasMoreElements()) {
41: set.add(e.nextElement());
42: }
43: }
44: }
45:
46: public Object getProperty(Object bean, String property) {
47: HttpSessionAndServletContext handle = (HttpSessionAndServletContext) bean;
48: HttpSession session = handle.getSession();
49: if (session != null) {
50: Object object = session.getAttribute(property);
51: if (object != null) {
52: return object;
53: }
54: }
55: return super .getProperty(handle.getServletContext(), property);
56: }
57:
58: public void setProperty(Object bean, String property, Object value) {
59: HttpSessionAndServletContext handle = (HttpSessionAndServletContext) bean;
60: HttpSession session = handle.getSession();
61: if (session != null) {
62: session.setAttribute(property, value);
63: } else {
64: throw new JXPathException("Cannot set session attribute: "
65: + "there is no session");
66: }
67: }
68: }
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