ClassNameEvaluator


1   // Copyright 2004, 2005 The Apache Software Foundation
2   //
3   // Licensed under the Apache License, Version 2.0 (the "License");
4   // you may not use this file except in compliance with the License.
5   // You may obtain a copy of the License at
6   //
7   //     http://www.apache.org/licenses/LICENSE-2.0
8   //
9   // Unless required by applicable law or agreed to in writing, software
10  // distributed under the License is distributed on an "AS IS" BASIS,
11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  // See the License for the specific language governing permissions and
13  // limitations under the License.
14  
15  package org.apache.hivemind.conditional;
16  
17  import org.apache.hivemind.util.Defense;
18  
19  /**
20   * Evaluator for a fully qualified class name.
21   * 
22   * @author Howard M. Lewis Ship
23   * @since 1.1
24   */
25  public class ClassNameEvaluator implements Evaluator
26  {
27      private String   _className;
28  
29      public ClassNameEvaluator(String   className)
30      {
31          Defense.notNull(className, "className");
32  
33          _className = className;
34      }
35  
36      // For testing
37  
38      String   getClassName()
39      {
40          return _className;
41      }
42  
43      public boolean evaluate(EvaluationContext context, Node node)
44      {
45          return context.doesClassExist(_className);
46      }
47  
48  }

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