01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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.configuration.web;
19:
20: import java.util.ArrayList;
21: import java.util.Collection;
22: import java.util.Iterator;
23: import java.util.List;
24:
25: import javax.servlet.ServletRequest;
26:
27: import org.apache.commons.collections.iterators.EnumerationIterator;
28:
29: /**
30: * A configuration wrapper to read the parameters of a servlet request. This
31: * configuration is read only, adding or removing a property will throw an
32: * UnsupportedOperationException.
33: *
34: * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a>
35: * @version $Revision: 515306 $, $Date: 2007-03-06 22:15:00 +0100 (Di, 06 Mrz 2007) $
36: * @since 1.1
37: */
38: public class ServletRequestConfiguration extends BaseWebConfiguration {
39: /** Stores the wrapped request.*/
40: protected ServletRequest request;
41:
42: /**
43: * Create a ServletRequestConfiguration using the request parameters.
44: *
45: * @param request the servlet request
46: */
47: public ServletRequestConfiguration(ServletRequest request) {
48: this .request = request;
49: }
50:
51: public Object getProperty(String key) {
52: String[] values = request.getParameterValues(key);
53:
54: if (values == null || values.length == 0) {
55: return null;
56: } else if (values.length == 1) {
57: return handleDelimiters(values[0]);
58: } else {
59: // ensure that escape characters in all list elements are removed
60: List result = new ArrayList(values.length);
61: for (int i = 0; i < values.length; i++) {
62: Object val = handleDelimiters(values[i]);
63: if (val instanceof Collection) {
64: result.addAll((Collection) val);
65: } else {
66: result.add(val);
67: }
68: }
69: return result;
70: }
71: }
72:
73: public Iterator getKeys() {
74: return new EnumerationIterator(request.getParameterNames());
75: }
76: }
|