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1   /*
2    * $Id: NotEmptyTag.java 471754 2006-11-06 14:55:09Z husted $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  package org.apache.struts.taglib.logic;
22  
23  import javax.servlet.jsp.JspException;
24  
25  /**
26   * Evalute the nested body content of this tag if the specified value is not
27   * empty for this request.
28   *
29   * @version $Rev: 471754 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004)
30   *          $
31   * @since Struts 1.1
32   */
33  public class NotEmptyTag extends EmptyTag {
34      // ------------------------------------------------------ Protected Methods
35  
36      /**
37       * Evaluate the condition that is being tested by this particular tag, and
38       * return <code>true</code> if the nested body content of this tag should
39       * be evaluated, or <code>false</code> if it should be skipped. This
40       * method must be implemented by concrete subclasses.
41       *
42       * @throws JspException if a JSP exception occurs
43       */
44      protected boolean condition()
45          throws JspException {
46          return (condition(false));
47      }
48  }