EmailAddress.java

/*
 * Copyright 2012 the original author or authors.
 *
 * 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.oreilly.springdata.querydsl.core;

import java.util.regex.Pattern;

import org.springframework.util.Assert;

import com.mysema.query.annotations.QueryEmbeddable;

/**
 * @author Oliver Gierke
 */
@QueryEmbeddable
public class EmailAddress {

	private static final String EMAIL_REGEX = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
	private static final Pattern PATTERN = Pattern.compile(EMAIL_REGEX);

	private String value;

	public EmailAddress(String emailAddress) {
		Assert.isTrue(isValid(emailAddress), "Invalid email address!");
		this.value = emailAddress;
	}

	public static boolean isValid(String candidate) {
		return candidate == null ? false : PATTERN.matcher(candidate).matches();
	}

	protected EmailAddress() {

	}

	/* 
	 * (non-Javadoc)
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		return value;
	}
}