RequiredTypeValidator


1   /*
2    * Copyright (c) 2003, Inversoft
3    *
4    * This software is distribuable under the GNU Lesser General Public License.
5    * For more information visit gnu.org.
6    */
7   package com.inversoft.util.typevalidator;
8   
9   
10  import java.util.Locale  ;
11  
12  import com.inversoft.util.StringTools;
13  
14  
15  /**
16   * This class ensures that a value is not empty or null and
17   * can be used to ensure that something required was specified.
18   *
19   * @author  Brian Pontarelli
20   */
21  public class RequiredTypeValidator extends BaseTypeValidator {
22  
23      /**
24       * The default error message for the required validator
25       */
26      public static final String   DEFAULT_MESSAGE = "Missing required value";
27  
28  
29      /**
30       * Validates the required value is not null or empty.
31       *
32       * @param   value The value to validate
33       * @param   params (Optional) A Map of parameters
34       * @param   message (Optional) The error message to return
35       * @param   locale Not used
36       * @param   mesgParams Parameters to the message (if any are needed)
37       * @return  The error message
38       */
39      protected String   internalValidate(Object   value, Object   params, String   message,
40              Locale   locale, Object  [] mesgParams) {
41  
42          boolean valid = true;
43          if (value == null) {
44              valid = false;
45          } else {
46              String   str = value.toString();
47              valid = !StringTools.isEmpty(str);
48          }
49  
50          String   error = null;
51          if (!valid) {
52              error = getErrorMessage(message, DEFAULT_MESSAGE, mesgParams);
53          }
54  
55          return error;
56      }
57  }
58

A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame

Popular Tags