/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 package org.apache.shiro.samples.sprhib.web;

 import org.apache.shiro.util.StringUtils;

 import org.springframework.validation.Errors;

 import org.springframework.validation.ValidationUtils;

 import org.springframework.validation.Validator;

 import java.util.regex.Pattern;

 /**

  * Validator for the signup form.

  */

 public class SignupValidator implements Validator {

     private static final String SIMPLE_EMAIL_REGEX = "[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,4}";

     public boolean supports(Class aClass) {

         return SignupCommand.class.isAssignableFrom(aClass);

     }

     public void validate(Object o, Errors errors) {

         SignupCommand command = (SignupCommand)o;

         ValidationUtils.rejectIfEmptyOrWhitespace(errors, "username", "error.username.empty", "Please specify a username.");

         ValidationUtils.rejectIfEmptyOrWhitespace(errors, "email", "error.email.empty", "Please specify an email address.");

         if( StringUtils.hasText( command.getEmail() ) && !Pattern.matches( SIMPLE_EMAIL_REGEX, command.getEmail().toUpperCase() ) ) {

             errors.rejectValue( "email", "error.email.invalid", "Please enter a valid email address." );

         }

         ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password", "error.password.empty", "Please specify a password.");

     }

 }