PatternValidator


1   //$Id: PatternValidator.java,v 1.1 2005/05/27 08:58:54 epbernard Exp $
2   package org.hibernate.validator;
3   
4   import java.util.regex.Matcher  ;
5   
6   /**
7    * check if a given element match the regular expression
8    * @author Gavin King
9    */
10  public class PatternValidator implements Validator<Pattern> {
11      
12      private java.util.regex.Pattern   pattern;
13  
14      public void initialize(Pattern parameters) {
15          pattern = java.util.regex.Pattern.compile(
16                  parameters.regex(), 
17                  parameters.flags() 
18              );
19      }
20  
21      public boolean isValid(Object   value) {
22          if (value==null) return true;
23          if ( !(value instanceof String  ) ) return false;
24          String   string = (String  ) value;
25          Matcher   m = pattern.matcher(string);
26          return m.matches();
27      }
28  
29  }
30

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