com.hs.mail.imap.schedule.ScheduleUtils.java Source code

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Here is the source code for com.hs.mail.imap.schedule.ScheduleUtils.java

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/*
 * Copyright 2010 the original author or authors.
 * 
 *  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 com.hs.mail.imap.schedule;

import java.util.Date;

import org.apache.commons.lang.time.DateUtils;

/**
 * 
 * @author Won Chul Doh
 * @since Oct 2, 2010
 *
 */
public class ScheduleUtils {

    public static Date getDateBefore(String str) {
        if (str != null) {
            int sz = str.length();
            for (int i = 0; i < sz; i++) {
                char ch = str.charAt(i);
                if (!Character.isDigit(ch)) {
                    try {
                        int amount = Integer.parseInt(str.substring(0, i));
                        switch (Character.toUpperCase(ch)) {
                        case 'D':
                            return DateUtils.addDays(new Date(), -amount);
                        case 'M':
                            return DateUtils.addMonths(new Date(), -amount);
                        case 'Y':
                            return DateUtils.addYears(new Date(), -amount);
                        }
                    } catch (NumberFormatException e) {
                        break;
                    }
                }
            }
        }
        return null;
    }

    public static Date getTimeAfter(String str, Date defaultTime) {
        if (str != null) {
            int sz = str.length();
            for (int i = 0; i < sz; i++) {
                char ch = str.charAt(i);
                if (!Character.isDigit(ch)) {
                    try {
                        int amount = Integer.parseInt(str.substring(0, i));
                        switch (Character.toUpperCase(ch)) {
                        case 'H':
                            return DateUtils.addHours(new Date(), amount);
                        case 'M':
                            return DateUtils.addMinutes(new Date(), amount);
                        }
                    } catch (NumberFormatException e) {
                        break;
                    }
                }
            }
        }
        return defaultTime;
    }

}