it.f2informatica.webapp.utils.PeriodParser.java Source code

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Here is the source code for it.f2informatica.webapp.utils.PeriodParser.java

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/*
 * =============================================================================
 *
 *   Copyright (c) 2014, Fernando Aspiazu
 *
 *   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 it.f2informatica.webapp.utils;

import org.apache.commons.lang3.ArrayUtils;
import org.joda.time.DateTime;
import org.joda.time.Period;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.MessageSource;
import org.springframework.stereotype.Component;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;

@Component
public class PeriodParser {

    @Autowired
    private MessageSource messageSource;

    @Autowired
    private HttpRequest httpRequest;

    public Date resolveDateByMonthAndYear(String month, String year) {
        try {
            return _resolveDateByMonthAndYear(month, year);
        } catch (NumberFormatException nfe) {
            nfe.printStackTrace();
            return null;
        }
    }

    private Date _resolveDateByMonthAndYear(String month, String year) {
        int yearInt = Integer.parseInt(year);
        int monthInt = Integer.parseInt(month);
        return new GregorianCalendar(yearInt, monthInt, 1, 0, 0, 0).getTime();
    }

    public String formatDateByMonthNameAndYear(Date date) {
        SimpleDateFormat dateFormat = new SimpleDateFormat("MMMMM yyyy", httpRequest.getLocale());
        return (date != null) ? dateFormat.format(date) : "";
    }

    public String printTotalTimeOfPeriodWhichHasElapsed(Date from, Date to) {
        DateTime timeFrom = new DateTime(from);
        DateTime timeTo = (to != null) ? new DateTime(to) : new DateTime();
        Period period = new Period(timeFrom, timeTo);
        return "(" + appendYears(period) + appendMonths(period) + ")";
    }

    private String appendYears(Period period) {
        int years = period.getYears();
        if (years <= 0) {
            return "";
        }
        return String.valueOf(years) + " " + ((years == 1) ? getMessage("global.year") : getMessage("global.years"))
                + " ";
    }

    private String appendMonths(Period period) {
        int months = period.getMonths();
        if (months <= 0) {
            return appendDays(period);
        }
        return String.valueOf(months) + " "
                + ((months == 1) ? getMessage("global.month") : getMessage("global.months"));
    }

    private String appendDays(Period period) {
        int days = period.getDays();
        if (days <= 0) {
            return " " + String.valueOf(days) + " " + getMessage("global.days");
        }
        return " " + String.valueOf(days) + " "
                + ((days == 1) ? getMessage("global.day") : getMessage("global.days"));
    }

    private String getMessage(String code) {
        return messageSource.getMessage(code, ArrayUtils.EMPTY_OBJECT_ARRAY, httpRequest.getLocale());
    }

}