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Java > Open Source Codes > org > alfresco > web > ui > common > component > evaluator > BooleanEvaluator


1 /*
2  * Copyright (C) 2005 Alfresco, Inc.
3  *
4  * Licensed under the Mozilla Public License version 1.1
5  * with a permitted attribution clause. You may obtain a
6  * copy of the License at
7  *
8  * http://www.alfresco.org/legal/license.txt
9  *
10  * Unless required by applicable law or agreed to in writing,
11  * software distributed under the License is distributed on an
12  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13  * either express or implied. See the License for the specific
14  * language governing permissions and limitations under the
15  * License.
16  */
17 package org.alfresco.web.ui.common.component.evaluator;
18
19 /**
20  * @author kevinr
21  *
22  * Evaluates to true if the value suppied is a boolean string of "true".
23  */
24 public class BooleanEvaluator extends BaseEvaluator
25 {
26    /**
27     * Evaluate against the component attributes. Return true to allow the inner
28     * components to render, false to hide them during rendering.
29     *
30     * @return true to allow rendering of child components, false otherwise
31     */
32    public boolean evaluate()
33    {
34       boolean result = false;
35       
36       try
37       {
38          if (getValue() instanceof Boolean JavaDoc)
39          {
40             result = ((Boolean JavaDoc)getValue()).booleanValue();
41          }
42          else
43          {
44             result = Boolean.valueOf((String JavaDoc)getValue()).booleanValue();
45          }
46       }
47       catch (Exception JavaDoc err)
48       {
49          // return default value on error
50 s_logger.debug("Unable to evaluate value to boolean: " + getValue());
51       }
52       
53       return result;
54    }
55 }
56
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