ReservationItem.java

/*
 * Copyright 2011-2014 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 pl.com.bottega.ecommerce.sales.domain.reservation;

import javax.persistence.Entity;
import javax.persistence.ManyToOne;

import pl.com.bottega.ddd.support.domain.BaseEntity;
import pl.com.bottega.ecommerce.sales.domain.productscatalog.Product;
import pl.com.bottega.ecommerce.sharedkernel.exceptions.DomainOperationException;

@Entity
class ReservationItem extends BaseEntity{

	@ManyToOne
	private Product product;
	
	private int quantity;

	@SuppressWarnings("unused")
	private ReservationItem(){}
	
	ReservationItem(Product product, int quantity) {
		this.product = product;
		this.quantity = quantity;
	}

	void changeQuantityBy(int change) {
		int changed = quantity + change;
		if (changed <= 0)
			throw new DomainOperationException(null, "change below 1");
		this.quantity = changed;
	}
	
	public Product getProduct() {
		return product;
	}

	public int getQuantity() {
		return quantity;
	}

	
}