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1   package org.codehaus.plexus.interpolation;
2   
3   /*
4    * Copyright 2001-2009 Codehaus Foundation.
5    *
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    *
10   *      http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  import java.util.Collections;
20  import java.util.List;
21  
22  /**
23   * If the expression matches, simply return the response object.
24   * @since 1.12
25   */
26  public class SingleResponseValueSource
27      implements ValueSource
28  {
29      
30      private final String expression;
31      private final Object response;
32  
33      public SingleResponseValueSource( String expression, Object response )
34      {
35          this.expression = expression;
36          this.response = response;
37      }
38  
39      public void clearFeedback()
40      {
41      }
42  
43      public List getFeedback()
44      {
45          return Collections.EMPTY_LIST;
46      }
47  
48      public Object getValue( String expression )
49      {
50          if ( this.expression.equals( expression ) )
51          {
52              return response;
53          }
54          
55          return null;
56      }
57  
58  }