package org.lightadmin.core.test.model;
import org.springframework.format.annotation.NumberFormat;
import org.springframework.util.Assert;
import javax.persistence.Entity;
import javax.persistence.ManyToOne;
import javax.validation.constraints.NotNull;
import java.math.BigDecimal;
@Entity
public class LineItem extends AbstractEntity {
@ManyToOne
private Product product;
@NotNull
@NumberFormat( style = NumberFormat.Style.CURRENCY )
private BigDecimal price;
private int amount;
/**
* Creates a new {@link LineItem} for the given {@link Product}.
*
* @param product must not be {@literal null}.
*/
public LineItem( Product product ) {
this( product, 1 );
}
/**
* Creates a new {@link LineItem} for the given {@link Product} and amount.
*
* @param product must not be {@literal null}.
* @param amount
*/
public LineItem( Product product, int amount ) {
Assert.notNull( product, "The given Product must not be null!" );
Assert.isTrue( amount > 0, "The amount of Products to be bought must be greater than 0!" );
this.product = product;
this.amount = amount;
this.price = product.getPrice();
}
public LineItem() {
}
/**
* Returns the {@link Product} the {@link LineItem} refers to.
*
* @return
*/
public Product getProduct() {
return product;
}
/**
* Returns the amount of {@link Product}s to be ordered.
*
* @return
*/
public int getAmount() {
return amount;
}
/**
* Returns the price a single unit of the {@link LineItem}'s product.
*
* @return the price
*/
public BigDecimal getUnitPrice() {
return price;
}
/**
* Returns the total for the {@link LineItem}.
*
* @return
*/
public BigDecimal getTotal() {
return price.multiply( BigDecimal.valueOf( amount ) );
}
}