InvoiceReference.java

package com.tradecloud.domain.model.deal;

import org.apache.commons.lang.Validate;

import javax.persistence.Column;
import javax.persistence.Embeddable;
import java.io.Serializable;

@Embeddable
public class InvoiceReference implements Serializable {

    @Column(name = "invoice_reference")
    private String reference;

    /**
     * For JPA.
     */
    public InvoiceReference() {
    }

    public static InvoiceReference valueOf(String reference) {
        Validate.notEmpty(reference, "Reference may not be null or empty");
        return new InvoiceReference(reference);
    }

    private InvoiceReference(String reference) {
        this.reference = reference;
    }

    public String getReference() {
        return reference;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final InvoiceReference other = (InvoiceReference) obj;
        if ((this.reference == null) ? (other.reference != null) : !this.reference.equals(other.reference)) {
            return false;
        }
        return true;
    }

    @Override
    public int hashCode() {
        int hash = 3;
        hash = 79 * hash + (this.reference != null ? this.reference.hashCode() : 0);
        return hash;
    }

}