org.springsource.restbucks.payment.CreditCardNumber.java Source code

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Here is the source code for org.springsource.restbucks.payment.CreditCardNumber.java

Source

/*
 * 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 org.springsource.restbucks.payment;

import javax.persistence.Column;
import javax.persistence.Embeddable;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import lombok.AccessLevel;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * Value object to represent a {@link CreditCardNumber}.
 * 
 * @author Oliver Gierke
 */
@Data
@Embeddable
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY)
public class CreditCardNumber {

    private static final String regex = "[0-9]{16}";

    @Column(unique = true)
    private String number;

    /**
     * Creates a new {@link CreditCardNumber}.
     * 
     * @param number must not be {@literal null} and be a 16 digit numerical only String.
     */
    public CreditCardNumber(String number) {

        if (!isValid(number)) {
            throw new IllegalArgumentException(String.format("Invalid credit card NUMBER %s!", number));
        }

        this.number = number;
    }

    /**
     * Returns whether the given {@link String} is a valid {@link CreditCardNumber}.
     * 
     * @param number
     * @return
     */
    public static boolean isValid(String number) {
        return number == null ? false : number.matches(regex);
    }
}