Client.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.client;

import javax.inject.Inject;
import javax.persistence.Entity;
import javax.persistence.Transient;

import pl.com.bottega.ddd.annotations.domain.AggregateRoot;
import pl.com.bottega.ddd.support.domain.BaseAggregateRoot;
import pl.com.bottega.ecommerce.canonicalmodel.publishedlanguage.ClientData;
import pl.com.bottega.ecommerce.sales.domain.payment.Payment;
import pl.com.bottega.ecommerce.sales.domain.payment.PaymentFactory;
import pl.com.bottega.ecommerce.sharedkernel.Money;

@Entity
@AggregateRoot
public class Client extends BaseAggregateRoot{

	private String name;
	
	@Inject
	@Transient
	private PaymentFactory paymentFactory;
	
	public ClientData generateSnapshot(){
		return new ClientData(aggregateId, name);
	}

	public boolean canAfford(Money amount) {		
		return true;//TODO explore domain rules ex: credit limit
	}

	/**
	 * Sample model: one aggregate creates another.<br>
	 * Client model does not compose Payment - therefore it does not manage Payment lifecycle.<br>
	 * Application layer is responsible for managing Payment lifecycle;
	 * 
	 * @param amount
	 * @return
	 */
	public Payment charge(Money amount) {
		if (! canAfford(amount)){			
			domainError("Can not afford: " + amount);
		}
		// TODO facade to the payment module
		
		return paymentFactory.createPayment(generateSnapshot(), amount);
	}
}