001/* Copyright (C) 2014 konik.io 002 * 003 * This file is part of the Konik library. 004 * 005 * The Konik library is free software: you can redistribute it and/or modify 006 * it under the terms of the GNU Affero General Public License as 007 * published by the Free Software Foundation, either version 3 of the 008 * License, or (at your option) any later version. 009 * 010 * The Konik library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 013 * GNU Affero General Public License for more details. 014 * 015 * You should have received a copy of the GNU Affero General Public License 016 * along with the Konik library. If not, see <http://www.gnu.org/licenses/>. 017 */ 018package io.konik.validator; 019 020import io.konik.validator.annotation.Email; 021 022import java.util.regex.Pattern; 023 024import javax.validation.ConstraintValidator; 025import javax.validation.ConstraintValidatorContext; 026 027/** 028 * 029 * The Email Validator for the @Email Annotation 030 */ 031public class EmailValidator implements ConstraintValidator<Email, String> { 032 private static final String EMAIL_PATTERN = "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$"; 033 034 private static final Pattern EMAIL_COMPILED_PATTERN = Pattern.compile(EMAIL_PATTERN); 035 036 @Override 037 public void initialize(Email constraintAnnotation) { 038 039 } 040 041 @Override 042 public boolean isValid(String email, ConstraintValidatorContext context) { 043 if (email==null) { 044 return true; 045 } 046 return EMAIL_COMPILED_PATTERN.matcher(email).matches(); 047 } 048}