AccountEvent.java

package fi.insomnia.bortal.model;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;

import org.eclipse.persistence.annotations.OptimisticLocking;
import org.eclipse.persistence.annotations.OptimisticLockingType;

/**
 * Account event contains the money / credit traffic for the user. Each row
 * references a Product entity.
 */

@Entity
@Table(name = "account_events")
@OptimisticLocking(type = OptimisticLockingType.CHANGED_COLUMNS)
public class AccountEvent extends GenericEntity {

    private static final long serialVersionUID = 2588419823225148100L;

    @Column(name = "cash", nullable = false)
    private boolean cash = false;
    /**
     * What 1 unit of this product costs.
     */
    @Column(name = "unit_price", nullable = false, precision = 24, scale = 4)
    private BigDecimal unitPrice;

    /**
     * The units of the product, eg 1.345 (l), 5 (units) 888.32 (g)..
     */
    @Column(name = "quantity", nullable = false, precision = 24, scale = 4)
    private BigDecimal quantity;

    /**
     * The time this AccountEvent is created.
     */
    @Column(name = "event_time", nullable = false)
    @Temporal(TemporalType.TIMESTAMP)
    private Calendar eventTime = Calendar.getInstance();

    /**
     * Is the product delivered to the user.
     */
    @Column(name = "delivered")
    @Temporal(TemporalType.TIMESTAMP)
    private Calendar delivered;

    /**
     * If this AccountEvent is a product in foodwace, this field is a reference
     * to that foodwave.
     */

    @JoinColumn(name = "food_wave_id", referencedColumnName = "id")
    @ManyToOne
    private FoodWave foodWave;

    /**
     * The product user has acquired and this this AccountEvent is a reference
     * to.
     */
    @JoinColumn(name = "product_id", referencedColumnName = "id", nullable = false)
    @ManyToOne(optional = false)
    private Product product;

    /**
     * The user that bought the products.
     */
    @JoinColumn(name = "user_id", referencedColumnName = "id", nullable = false)
    @ManyToOne(optional = false)
    private User user;

    /**
     * Who sold the items to the user.
     */
    @JoinColumn(name = "seller_user_id", referencedColumnName = "id")
    @ManyToOne(optional = true)
    private User seller;

    /**
     * What discounts user has for this account event. Some magic is applied to
     * calculate these.. :)
     */
    @OneToMany(mappedBy = "accountEvent", cascade = CascadeType.ALL)
    private List<DiscountInstance> discountInstances = new ArrayList<DiscountInstance>();

    /**
     * When user has paid a bill a Account event for product "Credit" is created
     * and reference to that bill is here..
     */
    @OneToOne(mappedBy = "accountEvent")
    private Bill bill;

    public BigDecimal getTotal() {
        return getQuantity().multiply(getUnitPrice());
    }

    public AccountEvent() {
    }

    public AccountEvent(User u, Product prod, BigDecimal unitPrice, BigDecimal quantity, Calendar eventTime) {

        this.setUnitPrice(unitPrice);
        this.setQuantity(quantity);
        this.product = prod;
        this.eventTime = eventTime;
        this.user = u;
    }

    public Calendar getEventTime() {
        return eventTime;
    }

    public void setEventTime(Calendar eventTime) {
        this.eventTime = eventTime;
    }

    public Calendar getDelivered() {
        return delivered;
    }

    public void setDelivered(Calendar delivered) {
        this.delivered = delivered;
    }

    public User getUser() {
        return user;
    }

    public void setUser(User usersId) {
        this.user = usersId;
    }

    public List<DiscountInstance> getDiscountInstances() {
        return discountInstances;
    }

    public void setDiscountInstances(List<DiscountInstance> discountInstanceList) {
        this.discountInstances = discountInstanceList;
    }

    public void setFoodWave(FoodWave foodWave) {
        this.foodWave = foodWave;
    }

    public FoodWave getFoodWave() {
        return foodWave;
    }

    public void setProduct(Product product) {
        this.product = product;
    }

    public Product getProduct() {
        return product;
    }

    public void setSeller(User seller) {
        this.seller = seller;
    }

    public User getSeller() {
        return seller;
    }

    public void setBill(Bill bill) {
        this.bill = bill;
    }

    public Bill getBill() {
        return bill;
    }

    public void setUnitPrice(BigDecimal unitPrice) {
        this.unitPrice = unitPrice;
    }

    public BigDecimal getUnitPrice() {
        return unitPrice;
    }

    public void setQuantity(BigDecimal quantity) {
        this.quantity = quantity;
    }

    public BigDecimal getQuantity() {
        return quantity;
    }

    public void setCash(boolean cash) {
        this.cash = cash;
    }

    public boolean isCash() {
        return cash;
    }

}