Create a date list with "change of conditions"

[Roberto Tucci]

Hi guys!
I've a complex (maybe) problem with my java application. Pratically, I've a date list (days of month) from a query and a date list (CoC) with a random number of dates.
I'm developing a java application to scan the days of month and write in output all the days of month and the relative date of other list when it changes.
I know, I'm uncleary but I've writed a simple code to make it clear to you. (I'm using JodaTime libs)

This is my (wrong) code:

 import java.util.ArrayList;
     
    import org.joda.time.MutableDateTime;
    import org.joda.time.format.DateTimeFormat;
    import org.joda.time.format.DateTimeFormatter;
     
    public class Test
    {
        public static void main(String[] args)
        {
            int count_coc = 0;
     
            String[] month = {"2014-04-28", "2014-04-29", "2014-04-30", "2014-05-01",
                            "2014-05-02", "2014-05-03", "2014-05-04", "2014-05-05", "2014-05-06",
                            "2014-05-07", "2014-05-08", "2014-05-09", "2014-05-10", "2014-05-11",
                            "2014-05-12", "2014-05-13", "2014-05-14", "2014-05-15", "2014-05-16",
                            "2014-05-17", "2014-05-18", "2014-05-19", "2014-05-20", "2014-05-21",
                            "2014-05-22", "2014-05-23", "2014-05-24", "2014-05-25", "2014-05-26",
                            "2014-05-27", "2014-05-28", "2014-05-29", "2014-05-30", "2014-05-31", "2014-06-01"};
     
            String[] CoC = {"2014-04-30", "2014-05-15", "2014-05-24"};
     
            DateTimeFormatter dtf = DateTimeFormat.forPattern("yyyy-MM-dd");
            MutableDateTime dateElab = new MutableDateTime(dtf.parseDateTime(month[0]));
            MutableDateTime dateLast = new MutableDateTime(dtf.parseDateTime(month[month.length-1]));
            ArrayList<MutableDateTime> dtJs = new ArrayList<MutableDateTime>();
     
            for (int i = 0; i<CoC.length;i++)
            {
             dtJs.add(new MutableDateTime(dtf.parseDateTime(CoC[i])));
            }
     
            do
            {
             if (dtJs.size() > 1)
             {
            	 if ((count_coc) < (dtJs.size()-1))
                 {
                     if (dateElab.isBefore(dtJs.get(count_coc+1)) || dateElab.isEqual(dtJs.get(count_coc+1)))
                     {
                         System.out.println("Date month: " + dtf.print(dateElab) + "      Date CoC: " + dtf.print(dtJs.get(count_coc)));
    
                         if ((count_coc) > dtJs.size())
                         {
                                 System.out.println("Date month: " + dtf.print(dateElab) + "      Date CoC: " + dtf.print(dtJs.get(count_coc)));
                         }
                         else
                         {
                                 count_coc++;
                         }
                             
                     }
                 }
            	 else
            	 {
            		 System.out.println("Date month: " + dtf.print(dateElab) + "      Date CoC: " + dtf.print(dtJs.get(count_coc)));
            	 }
                    
             }
             else
             {
                     System.out.println("Date month: " + dtf.print(dateElab) + "      Date CoC: " + dtf.print(dtJs.get(count_coc)));
             }
     
             dateElab.addDays(1);
            }
            while(dateElab.isBefore(dateLast) || dateElab.isEqual(dateLast));
        }
    }

This is the result:

    Date month: 2014-04-28      Date CoC: 2014-04-30
    Date month: 2014-04-29      Date CoC: 2014-05-15
    Date month: 2014-04-30      Date CoC: 2014-05-24
    Date month: 2014-05-01      Date CoC: 2014-05-24
    Date month: 2014-05-02      Date CoC: 2014-05-24
    Date month: 2014-05-03      Date CoC: 2014-05-24
    Date month: 2014-05-04      Date CoC: 2014-05-24
    Date month: 2014-05-05      Date CoC: 2014-05-24
    Date month: 2014-05-06      Date CoC: 2014-05-24
    Date month: 2014-05-07      Date CoC: 2014-05-24
    Date month: 2014-05-08      Date CoC: 2014-05-24
    Date month: 2014-05-09      Date CoC: 2014-05-24
    Date month: 2014-05-10      Date CoC: 2014-05-24
    Date month: 2014-05-11      Date CoC: 2014-05-24
    Date month: 2014-05-12      Date CoC: 2014-05-24
    Date month: 2014-05-13      Date CoC: 2014-05-24
    Date month: 2014-05-14      Date CoC: 2014-05-24
    Date month: 2014-05-15      Date CoC: 2014-05-24
    Date month: 2014-05-16      Date CoC: 2014-05-24
    Date month: 2014-05-17      Date CoC: 2014-05-24
    Date month: 2014-05-18      Date CoC: 2014-05-24
    Date month: 2014-05-19      Date CoC: 2014-05-24
    Date month: 2014-05-20      Date CoC: 2014-05-24
    Date month: 2014-05-21      Date CoC: 2014-05-24
    Date month: 2014-05-22      Date CoC: 2014-05-24
    Date month: 2014-05-23      Date CoC: 2014-05-24
    Date month: 2014-05-24      Date CoC: 2014-05-24
    Date month: 2014-05-25      Date CoC: 2014-05-24
    Date month: 2014-05-26      Date CoC: 2014-05-24
    Date month: 2014-05-27      Date CoC: 2014-05-24
    Date month: 2014-05-28      Date CoC: 2014-05-24
    Date month: 2014-05-29      Date CoC: 2014-05-24
    Date month: 2014-05-30      Date CoC: 2014-05-24
    Date month: 2014-05-31      Date CoC: 2014-05-24
    Date month: 2014-06-01      Date CoC: 2014-05-24

This is my expected result:

    Date month: 2014-04-28      Date CoC: 2014-04-30
    Date month: 2014-04-29      Date CoC: 2014-04-30
    Date month: 2014-04-30      Date CoC: 2014-04-30
    Date month: 2014-05-01      Date CoC: 2014-04-30
    Date month: 2014-05-02      Date CoC: 2014-04-30
    Date month: 2014-05-03      Date CoC: 2014-04-30
    Date month: 2014-05-04      Date CoC: 2014-04-30
    Date month: 2014-05-05      Date CoC: 2014-04-30
    Date month: 2014-05-06      Date CoC: 2014-04-30
    Date month: 2014-05-07      Date CoC: 2014-04-30
    Date month: 2014-05-08      Date CoC: 2014-04-30
    Date month: 2014-05-09      Date CoC: 2014-04-30
    Date month: 2014-05-10      Date CoC: 2014-04-30
    Date month: 2014-05-11      Date CoC: 2014-04-30
    Date month: 2014-05-12      Date CoC: 2014-04-30
    Date month: 2014-05-13      Date CoC: 2014-04-30
    (change date CoC)
    Date month: 2014-05-14      Date CoC: 2014-05-14
    Date month: 2014-05-16      Date CoC: 2014-05-14
    Date month: 2014-05-17      Date CoC: 2014-05-14
    Date month: 2014-05-18      Date CoC: 2014-05-14
    Date month: 2014-05-19      Date CoC: 2014-05-14
    Date month: 2014-05-20      Date CoC: 2014-05-14
    Date month: 2014-05-21      Date CoC: 2014-05-14
    Date month: 2014-05-22      Date CoC: 2014-05-14
    Date month: 2014-05-23      Date CoC: 2014-05-14
    (change date CoC)
    Date month: 2014-05-24      Date CoC: 2014-05-24
    Date month: 2014-05-25      Date CoC: 2014-05-24
    Date month: 2014-05-26      Date CoC: 2014-05-24
    Date month: 2014-05-27      Date CoC: 2014-05-24
    Date month: 2014-05-28      Date CoC: 2014-05-24
    Date month: 2014-05-29      Date CoC: 2014-05-24
    Date month: 2014-05-30      Date CoC: 2014-05-24
    Date month: 2014-05-31      Date CoC: 2014-05-24

Thanks so much!!

[Carey Brown]

On line 39 you are using count_coc to get dtJs element. You need an independent index into dtJs.

[Roberto Tucci]

Carey Brown wrote:On line 39 you are using count_coc to get dtJs element. You need an independent index into dtJs.

Thanks man for reply!
Yes, you're right...Anyway, there is something wrong in the logic of my code. I'm trying other solutions but it's very complex case...I'm losing all hopes...

[Campbell Ritchie]

Roberto Tucci wrote: . . . but it's very complex case. . .

I suspect it isn't. I suspect you have not worked out what the conditions are and not written them down simply and clearly in ordinary English/French/Welsh/Whatever.