ToolboxContext


1   /*
2    * Copyright 2003 The Apache Software Foundation.
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  
17  package org.apache.velocity.tools.view.context;
18  
19  import java.util.Map  ;
20  
21  import org.apache.velocity.VelocityContext;
22  import org.apache.velocity.context.Context;
23  
24  /**
25   * <p>Read-only context used to carry a set of view tools.</p>
26   *
27   * <p>Writes get dropped.</p>
28   *
29   * @author <a HREF="mailto:sidler@apache.org">Gabriel Sidler</a>
30   * @author <a HREF="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
31   *
32   * @version $Id: ToolboxContext.java,v 1.3 2004/02/18 20:07:58 nbubna Exp $ 
33   */
34  public class ToolboxContext extends VelocityContext
35  {
36      /**
37       * The collection of view tools in this toolbox.
38       */
39      private Map   toolbox;
40  
41  
42      /**
43       * Default constructor.
44       */
45      public ToolboxContext( Map   tb )
46      {
47          toolbox = tb;
48      }
49  
50  
51      /**
52       * Get value for key.
53       */
54      public Object   internalGet( String   key )
55      {
56          return toolbox.get( key );
57      }        
58  
59  
60      /**
61       * Does nothing. Returns <code>null</code> always.
62       */
63      public Object   internalPut( String   key, Object   value )
64      {
65          return null;
66      }
67      
68  }
69
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