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.ServletContext;
22:
23: import org.apache.commons.jxpath.DynamicPropertyHandler;
24:
25: /**
26: * Implementation of the DynamicPropertyHandler interface that provides
27: * access to attributes of a ServletContext.
28: *
29: * @author Dmitri Plotnikov
30: * @version $Revision: 1.6 $ $Date: 2004/05/08 15:10:49 $
31: */
32: public class ServletContextHandler implements DynamicPropertyHandler {
33:
34: private static final String[] STRING_ARRAY = new String[0];
35:
36: public String[] getPropertyNames(Object context) {
37: HashSet list = new HashSet(16);
38: collectPropertyNames(list, context);
39: return (String[]) list.toArray(STRING_ARRAY);
40: }
41:
42: protected void collectPropertyNames(HashSet set, Object bean) {
43: Enumeration e = ((ServletContext) bean).getAttributeNames();
44: while (e.hasMoreElements()) {
45: set.add(e.nextElement());
46: }
47: }
48:
49: public Object getProperty(Object context, String property) {
50: return ((ServletContext) context).getAttribute(property);
51: }
52:
53: public void setProperty(Object context, String property,
54: Object value) {
55: ((ServletContext) context).setAttribute(property, value);
56: }
57: }
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