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1   package org.apache.velocity.tools.view;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.util.Enumeration;
23  import javax.servlet.ServletContext;
24  
25  /**
26   * Implements {@link JeeConfig} with only a {@link ServletContext}.
27   *
28   * @version $Id$
29   * @since 2.0
30   */
31  public class JeeContextConfig implements JeeConfig
32  {
33      protected ServletContext context;
34  
35      public JeeContextConfig(ServletContext context)
36      {
37          if (context == null)
38          {
39              throw new NullPointerException("ServletContext should not be null; there must be a way to get a ServletContext");
40          }
41          this.context = context;
42      }
43  
44      /** {@inheritDoc} */
45      public String getInitParameter(String name)
46      {
47          return null;
48      }
49  
50      /**
51       * Only checks the {@link ServletContext}'s init-params
52       * for the specified parameter.
53       */
54      public String findInitParameter(String key)
55      {
56          return context.getInitParameter(key);
57      }
58  
59      /** {@inheritDoc} */
60      public Enumeration getInitParameterNames()
61      {
62          return null;
63      }
64  
65      /** {@inheritDoc} */
66      public String getName()
67      {
68          return null;
69      }
70  
71      /** {@inheritDoc} */
72      public ServletContext getServletContext()
73      {
74          return context;
75      }
76  
77  }