Java(TM) Boutique - Tutorial - Data Validation with the Spring Framework

Listing 6: The EmployeeValidator class.

<EmployeeValidator>
package jbriscoe.article.spring.validation.validator;

import jbriscoe.article.spring.validation.entity.Employee;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.validator.GenericValidator;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;

public class EmployeeValidator extends DefaultValidator {

  private Log log = LogFactory.getLog(getClass());

  public void validate(final Object obj, final Errors errors) {
    log.debug("Begin EmployeeValidator validation.");
    // Employee Name must not be empty
    ValidationUtils.rejectIfEmptyOrWhitespace(errors, "name", "errorCode");
    // Employee ID must not be empty and is a positive number
    ValidationUtils.rejectIfEmpty(errors, "employeeId", "errorCode");
    if(((Employee)obj).getEmployeeId() != null){
     if(!GenericValidator.minValue(((Employee)obj).getEmployeeId().intValue(), 1)){
	errors.rejectValue("employeeId", "errorCode");
     }
    }
    // Employee Home Address must not be empty
    ValidationUtils.rejectIfEmpty(errors, "homeAddress", "errorCode");
    log.debug("End EmployeeValidator validation.");
  }
  protected Class getValidatorSupportClass() {
    return Employee.class;
  }
}

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