001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.commons.jxpath.servlet;
018
019 import java.util.Enumeration;
020 import java.util.HashSet;
021 import javax.servlet.ServletRequest;
022
023 /**
024 * Implementation of the {@link org.apache.commons.jxpath.DynamicPropertyHandler}
025 * interface that provides access to attributes and parameters
026 * of a {@link ServletRequest}.
027 *
028 * @author Dmitri Plotnikov
029 * @version $Revision: 652848 $ $Date: 2008-05-02 12:53:50 -0500 (Fri, 02 May 2008) $
030 */
031 public class ServletRequestHandler extends HttpSessionHandler {
032
033 protected void collectPropertyNames(HashSet set, Object bean) {
034 super.collectPropertyNames(set, bean);
035 ServletRequestAndContext handle = (ServletRequestAndContext) bean;
036 ServletRequest servletRequest = handle.getServletRequest();
037 Enumeration e = servletRequest.getAttributeNames();
038 while (e.hasMoreElements()) {
039 set.add(e.nextElement());
040 }
041 e = servletRequest.getParameterNames();
042 while (e.hasMoreElements()) {
043 set.add(e.nextElement());
044 }
045 }
046
047 public Object getProperty(Object bean, String property) {
048 ServletRequestAndContext handle = (ServletRequestAndContext) bean;
049 ServletRequest servletRequest = handle.getServletRequest();
050 String[] strings = servletRequest.getParameterValues(property);
051
052 if (strings != null) {
053 if (strings.length == 0) {
054 return null;
055 }
056 if (strings.length == 1) {
057 return strings[0];
058 }
059 return strings;
060 }
061
062 Object object = servletRequest.getAttribute(property);
063 if (object != null) {
064 return object;
065 }
066
067 return super.getProperty(bean, property);
068 }
069
070 public void setProperty(Object request, String property, Object value) {
071 ((ServletRequestAndContext) request).getServletRequest().setAttribute(property, value);
072 }
073 }