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org.apache.jcs.auxiliary.disk.jdbc.mysql.util.ScheduleParser |
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1 | package org.apache.jcs.auxiliary.disk.jdbc.mysql.util; |
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2 | ||
3 | /* |
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4 | * Licensed to the Apache Software Foundation (ASF) under one |
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5 | * or more contributor license agreements. See the NOTICE file |
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6 | * distributed with this work for additional information |
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7 | * regarding copyright ownership. The ASF licenses this file |
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8 | * to you under the Apache License, Version 2.0 (the |
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9 | * "License"); you may not use this file except in compliance |
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10 | * with the License. You may obtain a copy of the License at |
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11 | * |
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12 | * http://www.apache.org/licenses/LICENSE-2.0 |
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13 | * |
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14 | * Unless required by applicable law or agreed to in writing, |
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15 | * software distributed under the License is distributed on an |
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16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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17 | * KIND, either express or implied. See the License for the |
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18 | * specific language governing permissions and limitations |
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19 | * under the License. |
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20 | */ |
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21 | ||
22 | import java.util.Calendar; |
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23 | import java.util.Date; |
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24 | import java.util.StringTokenizer; |
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25 | ||
26 | /** |
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27 | * Parses the very simple schedule format. |
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28 | * <p> |
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29 | * @author Aaron Smuts |
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30 | */ |
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31 | 0 | public class ScheduleParser |
32 | { |
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33 | /** |
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34 | * For each date time that is separated by a comma in the |
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35 | * OptimizationSchedule, create a date and add it to an array of dates. |
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36 | * <p> |
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37 | * @param schedule |
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38 | * @return Date[] |
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39 | * @throws ScheduleFormatException |
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40 | */ |
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41 | public static Date[] createDatesForSchedule( String schedule ) |
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42 | throws ScheduleFormatException |
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43 | { |
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44 | 42 | if ( schedule == null ) |
45 | { |
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46 | 7 | throw new ScheduleFormatException( "Cannot create schedules for a null String." ); |
47 | } |
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48 | ||
49 | 35 | StringTokenizer toker = new StringTokenizer( schedule, "," ); |
50 | 35 | Date[] dates = new Date[toker.countTokens()]; |
51 | 35 | int cnt = 0; |
52 | 105 | while ( toker.hasMoreTokens() ) |
53 | { |
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54 | 84 | String time = toker.nextToken(); |
55 | 84 | dates[cnt] = getDateForSchedule( time ); |
56 | 70 | cnt++; |
57 | 70 | } |
58 | 21 | return dates; |
59 | } |
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60 | ||
61 | /** |
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62 | * For a single string it creates a date that is the next time this hh:mm:ss |
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63 | * combo will be seen. |
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64 | * <p> |
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65 | * @param startTime |
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66 | * @return |
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67 | * @throws ScheduleFormatException |
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68 | */ |
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69 | public static Date getDateForSchedule( String startTime ) |
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70 | throws ScheduleFormatException |
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71 | { |
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72 | 91 | if ( startTime == null ) |
73 | { |
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74 | 7 | throw new ScheduleFormatException( "Cannot create date for a null String." ); |
75 | } |
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76 | ||
77 | 84 | int firstColon = startTime.indexOf( ":" ); |
78 | 84 | int lastColon = startTime.lastIndexOf( ":" ); |
79 | 84 | int len = startTime.length(); |
80 | 84 | if ( firstColon == -1 || lastColon == -1 || firstColon == lastColon || lastColon == len ) |
81 | { |
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82 | 7 | String message = "StartTime [" + startTime + "] is deformed. Unable to schedule optimizaiton."; |
83 | 7 | throw new ScheduleFormatException( message ); |
84 | } |
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85 | ||
86 | 77 | Calendar cal = Calendar.getInstance(); |
87 | try |
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88 | { |
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89 | 77 | int hour = Integer.parseInt( startTime.substring( 0, firstColon ) ); |
90 | 70 | cal.set( Calendar.HOUR_OF_DAY, hour ); |
91 | 70 | int minute = Integer.parseInt( startTime.substring( firstColon + 1, lastColon ) ); |
92 | 70 | cal.set( Calendar.MINUTE, minute ); |
93 | 70 | int second = Integer.parseInt( startTime.substring( lastColon + 1, len ) ); |
94 | 70 | cal.set( Calendar.SECOND, second ); |
95 | } |
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96 | 7 | catch ( NumberFormatException e ) |
97 | { |
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98 | 7 | String message = "Problem parsing start time [" + startTime + "]. It should be in HH:MM:SS format."; |
99 | 7 | throw new ScheduleFormatException( message ); |
100 | 70 | } |
101 | ||
102 | // if the date is less than now, add a day. |
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103 | 70 | Date now = new Date(); |
104 | 70 | if ( cal.getTime().before( now ) ) |
105 | { |
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106 | 46 | cal.add( Calendar.DAY_OF_MONTH, 1 ); |
107 | } |
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108 | ||
109 | 70 | return cal.getTime(); |
110 | } |
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111 | } |
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