IntervalSchedule


1   package org.oddjob.schedules.schedules;
2   
3   import java.io.Serializable  ;
4   import java.text.ParseException  ;
5   import java.util.Date  ;
6   
7   import org.oddjob.schedules.RegularSchedule;
8   import org.oddjob.util.DateHelper;
9   
10  /**
11   * @oddjob.description This schedule returns an interval 
12   * from the given time to the interval time later.
13   * Commonly used within a {@link TimeSchedule} schedule.
14   * 
15   * @oddjob.example
16   * 
17   * <pre>
18   * &lt;interval interval="00:20" /&gt;
19   * </pre>
20   *
21   * @author Rob Gordon
22   */
23  
24  final public class IntervalSchedule extends RegularSchedule implements Serializable   {
25  
26      private static final long serialVersionUID = 20050226;
27      
28      /**
29       * Milliseconds for the interval.
30       */
31      private Long   intervalMillis;
32  
33      /**
34       * @oddjob.property interval
35       * @oddjob.description The interval time. 
36       * @oddjob.required No but defaults to forever.
37       * 
38       * @param interval The interval.
39       * @throws ParseException If the interval is not a valid date.
40       */
41      public void setInterval(String   interval) throws ParseException   {                        
42          intervalMillis = new Long  (DateHelper.parseTime(interval));
43      }
44  
45      /*
46       *  (non-Javadoc)
47       * @see org.treesched.RegularSchedule#next(java.util.Date)
48       */
49      public Date   next(Date   from) {
50          if (intervalMillis == null) {
51              return new Date  (Long.MAX_VALUE);
52          }
53          return new Date  (from.getTime() + intervalMillis.longValue());
54      }
55  }
56

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