Offer.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.offer;

import java.util.ArrayList;
import java.util.List;

import pl.com.bottega.ddd.annotations.domain.ValueObject;
import pl.com.bottega.ecommerce.canonicalmodel.publishedlanguage.AggregateId;

/**
 * Offer that is available per client (including availability and discounts)
 *   
 * @author Slawek
 *
 */
@ValueObject
public class Offer {

	private List<OfferItem> availabeItems = new ArrayList<OfferItem>();
	
	private List<OfferItem> unavailableItems = new ArrayList<OfferItem>();
	
	
	public Offer(List<OfferItem> availabeItems, List<OfferItem> unavailableItems) {
		this.availabeItems = availabeItems;
		this.unavailableItems = unavailableItems;
	}

	public List<OfferItem> getAvailabeItems() {
		return availabeItems;
	}
	
	public List<OfferItem> getUnavailableItems() {
		return unavailableItems;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result
				+ ((availabeItems == null) ? 0 : availabeItems.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Offer other = (Offer) obj;
		if (availabeItems == null) {
			if (other.availabeItems != null)
				return false;
		} else if (!availabeItems.equals(other.availabeItems))
			return false;
		return true;
	}

	/**
	 * 
	 * @param seenOffer
	 * @param delta acceptable difference in percent
	 * @return
	 */
	public boolean sameAs(Offer seenOffer, double delta) {
		if (! (availabeItems.size() == seenOffer.availabeItems.size()))
			return false;
		
		for (OfferItem item : availabeItems) {
			OfferItem sameItem = seenOffer.findItem(item.getProductData().getProductId());
			if (sameItem == null)
				return false;
			if (!sameItem.sameAs(item, delta))
				return false;
		}
		
		return true;
	}

	private OfferItem findItem(AggregateId productId) {
		for (OfferItem item : availabeItems){
			if (item.getProductData().getProductId().equals(productId))
				return item;
		}
		return null;
	}
	
	
}