rabbit.data.internal.xml.DatatypeUtil.java Source code

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Here is the source code for rabbit.data.internal.xml.DatatypeUtil.java

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/*
 * Copyright 2010 The Rabbit Eclipse Plug-in Project
 * 
 * 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 rabbit.data.internal.xml;

import org.joda.time.DateTime;
import org.joda.time.LocalDate;

import java.util.GregorianCalendar;

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

/**
 * A utility class.
 */
public class DatatypeUtil {

    /**
     * An data type factory for creating XML data types.
     */
    public static DatatypeFactory datatypeFactory;

    static {
        try {
            datatypeFactory = DatatypeFactory.newInstance();
        } catch (DatatypeConfigurationException e) {

            // Try again?
            try {
                datatypeFactory = DatatypeFactory.newInstance();
            } catch (DatatypeConfigurationException ex) {
                e.printStackTrace(); // OK, I give up...
            }
        }
    }

    /**
     * Checks whether the two dates are representing the same year, month, and day
     * of month.
     * 
     * @param date1 The first date.
     * @param date2 The second date.
     * @return true if the two dates are representing the same date in time, false
     *         otherwise.
     */
    public static boolean isSameDate(DateTime date1, XMLGregorianCalendar date2) {

        return (date2.getYear() == date1.getYear()) && (date2.getMonth() == date1.getMonthOfYear())
                && (date2.getDay() == date1.getDayOfMonth());
    }

    /**
     * Checks whether the two calendars are representing the same month in time.
     * 
     * @param cal1 The first calendar.
     * @param cal2 The second calendar.
     * @return true if the two calendars are representing the same month in time,
     *         false otherwise.
     */
    public static boolean isSameMonthInYear(DateTime cal1, DateTime cal2) {
        return (cal1.getYear() == cal2.getYear()) && (cal1.getMonthOfYear() == cal2.getMonthOfYear());
    }

    /**
     * Checks whether the two dates are representing the same year and same month.
     * 
     * @param cal1 The first date.
     * @param cal2 The second date.
     * @return True if both dates are representing the same year and same month.
     */
    public static boolean isSameMonthInYear(DateTime cal1, LocalDate cal2) {
        return (cal1.getYear() == cal2.getYear()) && (cal1.getMonthOfYear() == cal2.getMonthOfYear());
    }

    /**
     * Converts the given calendar to a {@link LocalDate}.
     * 
     * @param cal The calendar to convert.
     * @return A converted {@linkplain LocalDate}.
     */
    public static LocalDate toLocalDate(XMLGregorianCalendar cal) {
        return new LocalDate(cal.getYear(), cal.getMonth(), cal.getDay());
    }

    /**
     * Converts a {@link DateTime} to {@link XMLGregorianCalendar}. The converted
     * calendar is a date, which means only the year, month and day of month
     * fields are set.
     * 
     * @param cal The calendar to convert from.
     * @return The converted calendar.
     */
    public static XMLGregorianCalendar toXmlDate(DateTime cal) {
        return datatypeFactory.newXMLGregorianCalendarDate(cal.getYear(), cal.getMonthOfYear(), cal.getDayOfMonth(),
                DatatypeConstants.FIELD_UNDEFINED);
    }

    /**
     * Converts a {@link LocalDate} to {@link XMLGregorianCalendar}. The
     * converted calendar is a date, which means only the year, month and day of
     * month fields are set.
     * 
     * @param cal The calendar to convert from.
     * @return The converted calendar.
     */
    public static XMLGregorianCalendar toXmlDate(LocalDate cal) {
        return datatypeFactory.newXMLGregorianCalendarDate(cal.getYear(), cal.getMonthOfYear(), cal.getDayOfMonth(),
                DatatypeConstants.FIELD_UNDEFINED);
    }

    /**
     * Converts a {@code GregorianCalendar} to a {@code XMLGregorianCalendar} date
     * time.
     * 
     * @param cal The calendar to convert from.
     * @return A converted calendar.
     */
    public static XMLGregorianCalendar toXmlDateTime(GregorianCalendar cal) {
        return datatypeFactory.newXMLGregorianCalendar(cal);
    }
}