EmailAddress.java

package com.oreilly.springdata.roo.domain;

import javax.persistence.Embeddable;
import javax.validation.constraints.NotNull;
import org.springframework.roo.addon.javabean.RooJavaBean;
import org.springframework.roo.addon.tostring.RooToString;

@RooJavaBean
@RooToString
@Embeddable
public class EmailAddress {

    @NotNull
    private String address;
}