demo.domain.VehicleIdentificationNumber.java Source code

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Here is the source code for demo.domain.VehicleIdentificationNumber.java

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/*
 * Copyright 2012-2016 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 demo.domain;

import org.springframework.util.Assert;

public final class VehicleIdentificationNumber {

    private String vin;

    public VehicleIdentificationNumber(String vin) {
        Assert.notNull(vin, "VIN must not be null");
        Assert.isTrue(vin.length() == 17, "VIN must be exactly 17 characters");
        this.vin = vin;
    }

    @Override
    public int hashCode() {
        return this.vin.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj == null || obj.getClass() != getClass()) {
            return false;
        }
        return this.vin.equals(((VehicleIdentificationNumber) obj).vin);
    }

    @Override
    public String toString() {
        return this.vin;
    }

}