/*
 * Copyright 2002-2006,2009 The Apache Software Foundation.
 * 
 * Licensed 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 com.opensymphony.xwork2.validator.validators;


/**
 * <!-- START SNIPPET: javadoc -->
 * EmailValidator checks that a given String field, if not empty,
 * is a valid email address.
 * <p/>
 * <p/>
 * The regular expression used to validate that the string is an email address
 * is:
 * </p>
 * <pre>
 * \\b(^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@([A-Za-z0-9-])+((\\.com)|(\\.net)|(\\.org)|(\\.info)|(\\.edu)|(\\.mil)|(\\.gov)|(\\.biz)|(\\.ws)|(\\.us)|(\\.tv)|(\\.cc)|(\\.aero)|(\\.arpa)|(\\.coop)|(\\.int)|(\\.jobs)|(\\.museum)|(\\.name)|(\\.pro)|(\\.travel)|(\\.nato)|(\\..{2,3})|(\\..{2,3}\\..{2,3}))$)\\b
 * </pre>
 * <!-- END SNIPPET: javadoc -->
 * 
 * 
 * <!-- START SNIPPET: parameters -->
 * <ul>
 * 		<li>fieldName - The field name this validator is validating. Required if using Plain-Validator Syntax otherwise not required</li>
 * </ul>
 * <!-- END SNIPPET: parameters -->
 * 
 * 
 * <pre>
 * <!-- START SNIPPET: example -->
 *     <!-- Plain Validator Syntax -->
 *     <validators>
 *         <validator type="email">
 *             <param name="fieldName">myEmail</param>
 *             <message>Must provide a valid email</message>
 *         </validator>
 *     </validators>
 *     
 *     <!-- Field Validator Syntax -->
 *     <field name="myEmail">
 *        <field-validator type="email">
 *           <message>Must provide a valid email</message>
 *        </field-validator>
 *     </field>
 * <!-- END SNIPPET: example -->
 * </pre>
 *
 * @author jhouse
 * @author tm_jee
 * @version $Date$ $Id$
 */
public class EmailValidator extends RegexFieldValidator {

	// see XW-371 
    public static final String emailAddressPattern =
    	"\\b(^['_A-Za-z0-9-]+(\\.['_A-Za-z0-9-]+)*@([A-Za-z0-9-])+(\\.[A-Za-z0-9-]+)*((\\.[A-Za-z0-9]{2,})|(\\.[A-Za-z0-9]{2,}\\.[A-Za-z0-9]{2,}))$)\\b";

    public EmailValidator() {
        setExpression(emailAddressPattern);
        setCaseSensitive(false);
    }

}