Compares two Calendars for equality down to a given precision. - Android java.util

Android examples for java.util:Date Compare

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Description

Compares two Calendars for equality down to a given precision.

Demo Code


import android.util.Log;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main{
    private static final String TAG = TimeUtils.class.getName();
    /**Hours elapsed in current day (24 hour format)**/
    public static final int HOUR_OF_DAY = 4;
    /**Days elapsed in current year**/
    public static final int DAY_OF_YEAR = 8;
    /** Second precision **/
    public static final int SECOND = 16;
    /** Minute precision **/
    public static final int MINUTE = 32;
    /** Hour precision **/
    public static final int HOUR = 64;
    /** Day precision **/
    public static final int DAY = 128;
    /** Week precision **/
    public static final int WEEK = 256;
    /** Month precision **/
    public static final int MONTH = 512;
    /** Year precision **/
    public static final int YEAR = 1024;
    private static final String ERR_MESSAGE_INVALID_FIELD = "Invalid time field requested";
    /**/*from   w w w.  java 2s  .  c  o  m*/
     * Compares two Calendars for equality down to a given precision. To specify precision use one of the following
     * class constants
     *
     * @param cal1 first Calendar to compare
     * @param cal2 second Calendar to compare
     * @param field precision required for equality
     * @return true if Calendars are equal down to specified precision
     */
    public static boolean compareCalendarsToPrecision(Calendar cal1,
            Calendar cal2, int field) {
        switch (field) {
        case SECOND:
            if (cal1.get(Calendar.SECOND) != cal2.get(Calendar.SECOND)) {
                return false;
            }
        case MINUTE:
            if (cal1.get(Calendar.MINUTE) != cal2.get(Calendar.MINUTE)) {
                return false;
            }
        case HOUR:
            if (cal1.get(Calendar.HOUR_OF_DAY) != cal2
                    .get(Calendar.HOUR_OF_DAY)) {
                return false;
            }
        case DAY:
            if (cal1.get(Calendar.DAY_OF_YEAR) != cal2
                    .get(Calendar.DAY_OF_YEAR)) {
                return false;
            }
        case WEEK:
            if (cal1.get(Calendar.WEEK_OF_YEAR) != cal2
                    .get(Calendar.WEEK_OF_YEAR)) {
                return false;
            }
        case MONTH:
            if (cal1.get(Calendar.MONTH) != cal2.get(Calendar.MONTH)) {
                return false;
            }
        case YEAR:
            if (cal1.get(Calendar.YEAR) != cal2.get(Calendar.YEAR)) {
                return false;
            }
        default:
            Log.e(TAG, ERR_MESSAGE_INVALID_FIELD
                    + "(in compareCalendarsToPrecision)");

        }
        //Everything matched up to desired precision
        return true;
    }
}

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