org.vincibean.salestaxes.service.implementations.ReceiptServiceImpl.java Source code

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Here is the source code for org.vincibean.salestaxes.service.implementations.ReceiptServiceImpl.java

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/*
 * Copyright (C) 2015  Vincibean <Andre Bessi>
 * 
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.vincibean.salestaxes.service.implementations;

import java.util.GregorianCalendar;
import java.util.List;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.vincibean.salestaxes.domain.Poiuyt;
import org.vincibean.salestaxes.generated.HeaderType;
import org.vincibean.salestaxes.generated.Receipt;
import org.vincibean.salestaxes.service.ReceiptService;
import org.vincibean.salestaxes.service.converter.PoiuytConverter;
import org.vincibean.salestaxes.util.PoiuytPriceCalculator;
import org.vincibean.salestaxes.util.Rounder;

/**
 * Service class implementing methods for dealing with {@link Receipt} objects, 
 * a generated class that is used for returning an XML receipt to the user.
 * 
 * @author Vincibean
 *
 */
@Service
public class ReceiptServiceImpl implements ReceiptService {

    Logger logger = LoggerFactory.getLogger(ReceiptServiceImpl.class);

    @Autowired
    private PoiuytConverter poiuytConverter;

    private static final String ISSUER_NAME = "FooBar Market";

    @Override
    public Receipt generateReceipt(final List<Poiuyt> poiuytList) {
        Receipt receipt = new Receipt();
        receipt.setHeader(createHeader());
        for (Poiuyt poiuyt : poiuytList) {
            receipt.getPoiuyts().add(poiuytConverter.convert(poiuyt));
        }
        receipt.setTotalBasePrices(PoiuytPriceCalculator.calculatePoiuytBasketTotalBasePrice(poiuytList));
        receipt.setTotalTaxes(Rounder.round(PoiuytPriceCalculator.calculatePoiuytBasketTotalTaxes(poiuytList)));
        receipt.setGrandTotal(receipt.getTotalBasePrices() + receipt.getTotalTaxes());
        return receipt;
    }

    /**
     * Factory method, create a {@link HeaderType}, an object containing basic informations (e.g. date of emission, 
     * issuer, etc...)
     * @return a fully populated {@link HeaderType}.
     */
    private HeaderType createHeader() {
        HeaderType header = new HeaderType();
        header.setIssuer(ISSUER_NAME);
        try {
            header.setTimeStamp(DatatypeFactory.newInstance().newXMLGregorianCalendar(new GregorianCalendar()));
        } catch (DatatypeConfigurationException e) {
            logger.debug("Unexpected error while giving the Receipt's Header a timestamp.");
        }
        return header;
    }

}