gemfire.practice.domain.EmailAddress.java Source code

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Here is the source code for gemfire.practice.domain.EmailAddress.java

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/*
 * 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 gemfire.practice.domain;

import java.io.Serializable;
import java.util.regex.Pattern;

import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;

/**
 * Value object to represent email addresses.
 * 
 * @author Oliver Gierke
 */

public final class EmailAddress implements Serializable {

    private static final long serialVersionUID = -2990839949384592331L;

    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 final String value;

    /**
     * Creates a new {@link EmailAddress} from the given {@link String} representation.
     * 
     * @param emailAddress must not be {@literal null} or empty.
     */
    EmailAddress(String emailAddress) {
        Assert.isTrue(isValid(emailAddress), "Invalid email address!: " + emailAddress);
        value = emailAddress;
    }

    /**
     * Returns whether the given value is a valid {@link EmailAddress}.
     * 
     * @param source must not be {@literal null} or empty.
     * @return
     */
    public static boolean isValid(String source) {
        Assert.hasText(source);
        return PATTERN.matcher(source).matches();
    }

    public String getValue() {
        return value;
    }

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

    /*
     * (non-Javadoc)
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object obj) {

        if (this == obj) {
            return true;
        }

        if (!(obj instanceof EmailAddress)) {
            return false;
        }

        EmailAddress that = (EmailAddress) obj;
        return value.equals(that.value);
    }

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

    @Component
    static class EmailAddressToStringConverter implements Converter<EmailAddress, String> {

        /*
         * (non-Javadoc)
         * @see org.springframework.core.convert.converter.Converter#convert(java.lang.Object)
         */
        @Override
        public String convert(EmailAddress source) {
            return source == null ? null : source.value;
        }
    }

    @Component
    static class StringToEmailAddressConverter implements Converter<String, EmailAddress> {

        /*
         * (non-Javadoc)
         * @see org.springframework.core.convert.converter.Converter#convert(java.lang.Object)
         */
        @Override
        public EmailAddress convert(String source) {
            return StringUtils.hasText(source) ? new EmailAddress(source) : null;
        }
    }
}