com.day.cq.analytics.sitecatalyst.util.RelativeDateFormat Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of aem-sdk-api Show documentation

The Adobe Experience Manager SDK

There is a newer version: 2024.11.18751.20241128T090041Z-241100

/*************************************************************************
 *
 * ADOBE CONFIDENTIAL
 * __________________
 *
 *  Copyright 2012 Adobe Systems Incorporated
 *  All Rights Reserved.
 *
 * NOTICE:  All information contained herein is, and remains
 * the property of Adobe Systems Incorporated and its suppliers,
 * if any.  The intellectual and technical concepts contained
 * herein are proprietary to Adobe Systems Incorporated and its
 * suppliers and may be covered by U.S. and Foreign Patents,
 * patents in process, and are protected by trade secret or copyright law.
 * Dissemination of this information or reproduction of this material
 * is strictly forbidden unless prior written permission is obtained
 * from Adobe Systems Incorporated.
 **************************************************************************/
package com.day.cq.analytics.sitecatalyst.util;

import java.text.DateFormatSymbols;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

@SuppressWarnings("serial")
public class RelativeDateFormat extends SimpleDateFormat {
    
    protected Date base;
    
    protected static final String RELATIVE_DATE_REGEX = "([+-]\\d+)([dDmMyY])";
    
    protected Pattern pattern;
    
    public RelativeDateFormat() {
        super();
        this.pattern = Pattern.compile(RELATIVE_DATE_REGEX);
        base = new Date();
    }

    public RelativeDateFormat(String pattern) {
        super(pattern);
        this.pattern = Pattern.compile(RELATIVE_DATE_REGEX);
        base = new Date();
    }

    public RelativeDateFormat(String pattern, DateFormatSymbols formatSymbols) {
        super(pattern, formatSymbols);
        this.pattern = Pattern.compile(RELATIVE_DATE_REGEX);
        base = new Date();
    }

    public RelativeDateFormat(String pattern, Locale locale) {
        super(pattern, locale);
        this.pattern = Pattern.compile(RELATIVE_DATE_REGEX);
        base = new Date();
    }
    
    public Date parseRelative(String text) throws ParseException {
        Matcher matcher = pattern.matcher(text);
        if(matcher.matches()) {
            // integer parsing does not work with leading +
            int amount = Integer.parseInt(matcher.group(1).replace("+", "")); 
            String unit = matcher.group(2).toLowerCase();
            
            GregorianCalendar cal = new GregorianCalendar();
            cal.setTime(this.base);
            
            int field = 0;
            if(unit.equals("d"))
                field = GregorianCalendar.DAY_OF_MONTH;
            else if(unit.equals("m"))
                field = GregorianCalendar.MONTH;
            else if(unit.equals("y"))
                field = GregorianCalendar.YEAR;
            cal.add(field, amount);

            return cal.getTime();
        }else return this.parse(text);
    }
    
    public void setBaseDate(Date base) {
        if(base != null)
            this.base = base;
    }
}