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1   package org.mod4j.runtime.validation;
2   
3   import org.springframework.util.Assert;
4   import org.springframework.validation.Errors;
5   import org.springframework.validation.Validator;
6   
7   /**
8    * @author Eric Jan Malotaux
9    * 
10   */
11  public class MinValueValidator implements Validator {
12  
13      private String field;
14  
15      private long min;
16  
17      private Class clazz;
18  
19      /**
20       * @param field
21       * @param min
22       */
23      public MinValueValidator(Class clazz, String field, long min) {
24          this.clazz = clazz;
25          this.field = field;
26          this.min = min;
27      }
28  
29      @SuppressWarnings("unchecked")
30      public boolean supports(Class clazz) {
31          return this.clazz.isAssignableFrom(clazz);
32      }
33  
34      public void validate(Object target, Errors errors) {
35  
36          Long value = null;
37  
38          if (errors.getFieldValue(field) instanceof Integer) {
39              value = ((Integer) errors.getFieldValue(field)).longValue();
40          } else if (errors.getFieldValue(field) instanceof Long) {
41              value = ((Long) errors.getFieldValue(field));
42          }
43  
44          if (value != null) {
45              Assert.notNull(value);
46              if (value < min) {
47                  errors.rejectValue(field, "field.value.min", new Long[] { new Long(min), new Long(value) }, field
48                          + " should be at least " + min + ", but was " + value);
49              }
50          }
51      }
52  }