LengthValidator


1   //$Id: LengthValidator.java,v 1.1 2005/05/27 08:58:53 epbernard Exp $
2   package org.hibernate.validator;
3   
4   import org.hibernate.mapping.Column;
5   import org.hibernate.mapping.Property;
6   
7   /**
8    * Do check a length restriction on a string, and apply expected contraints on hibernate metadata.
9    * 
10   * @author Gavin King
11   */
12  public class LengthValidator implements Validator<Length>, PropertyConstraint {
13      private int max;
14      private int min;
15      
16      public void initialize(Length parameters) {
17          max = parameters.max();
18          min = parameters.min();
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          int length = string.length();
26          return length>=min && length<=max;
27      }
28  
29      public void apply(Property property) {
30          Column col = (Column) property.getColumnIterator().next();
31          col.setLength(max);
32      }
33  
34  }
35

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