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1   /*
2    * Copyright 2023 Web-Legacy
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.tiles.request.jakarta.servlet.extractor;
17  
18  import java.util.Enumeration;
19  
20  import org.apache.tiles.request.attribute.HasKeys;
21  
22  import jakarta.servlet.http.HttpServletRequest;
23  
24  /**
25   * Extract parameters from the request.
26   *
27   * <p>Copied from Apache tiles-request-servlet 1.0.7 and adapted for
28   * Jakarta EE 9.</p>
29   */
30  public class ParameterExtractor implements HasKeys<String> {
31  
32      /**
33       * The servlet request.
34       */
35      private HttpServletRequest request;
36  
37      /**
38       * Constructor.
39       *
40       * @param request The servlet request.
41       */
42      public ParameterExtractor(HttpServletRequest request) {
43          this.request = request;
44      }
45  
46      /**
47       * The enumeration of the keys in the stored attributes.
48       *
49       * @return The keys.
50       */
51      @Override
52      public Enumeration<String> getKeys() {
53          return request.getParameterNames();
54      }
55  
56      /**
57       * Returns the value of the attribute with the given key.
58       *
59       * @param key The key of the attribute.
60       *
61       * @return The value.
62       */
63      @Override
64      public String getValue(String key) {
65          return request.getParameter(key);
66      }
67  }