DateParamTag


1   /*
2    * Copyright 1999-2004 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  package org.apache.taglibs.standard.tag.el.sql;
17  
18  import java.util.Date  ;
19  
20  import javax.servlet.jsp.JspException  ;
21  
22  import org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager;
23  import org.apache.taglibs.standard.tag.common.sql.DateParamTagSupport;
24  
25  /**
26   * Subclass for the JSTL library with EL support.
27   *
28   * @author Justyna Horwat
29   */
30  public class DateParamTag extends DateParamTagSupport {
31      
32      private String   valueEL;
33      private String   typeEL;
34  
35      public void setValue(String   valueEL) {
36      this.valueEL = valueEL;
37      }
38  
39      public void setType(String   typeEL) {
40      this.typeEL = typeEL;
41      }
42  
43      public int doStartTag() throws JspException   {
44          evaluateExpressions();
45      return super.doStartTag();
46      }
47  
48      //*********************************************************************
49      // Private utility methods
50  
51      // Evaluates expressions as necessary
52      private void evaluateExpressions() throws JspException   {
53      if (valueEL != null) {
54          value = (Date  ) ExpressionEvaluatorManager.evaluate(
55                  "value", valueEL, Date  .class, this, pageContext);
56      }
57  
58      if (typeEL != null) {
59          type = (String  ) ExpressionEvaluatorManager.evaluate(
60                  "type", typeEL, String  .class, this, pageContext);
61          }
62      }
63  
64  }
65
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