package com.luv2code.springdemo;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.ListIterator;

class DateRange {

private Date startDate;
private Date endDate;

public void setEndDate(Date endDate) {
this.endDate = endDate;
}

public void setStartDate(Date startDate) {
this.startDate = startDate;
}

public Date getEndDate() {
return endDate;
}

public Date getStartDate() {
return startDate;
}

public DateRange(Date startDate, Date endDate) {
super();
this.startDate = startDate;
this.endDate = endDate;
}

}

public class DateMerger {

public List<DateRange> mergeDates(List<DateRange> dateRanges) {

List<DateRange> returnList = new ArrayList<DateRange>();
for (int i = 0; i < dateRanges.size(); i++) {
DateRange temp = dateRanges.get(i);
for (int k = i + 1; k < dateRanges.size(); k++) {
DateRange temp1 = dateRanges.get(k);
if (temp.getEndDate().compareTo(temp1.getStartDate()) >= 0) {
System.out.println("Success: Condition Satisfied Hence Merging the Dates");
temp.setEndDate(temp1.getEndDate());
returnList.add(new DateRange(temp.getStartDate(), temp.getEndDate()));
} else {
System.out.println("Failed : Condition Failed Hence not Merging the Dates");
}

}
System.out.println("****************************************");

}

return returnList;
}

public static void main(String[] args) throws ParseException {

try {
DateMerger d = new DateMerger();

List<DateRange> l = new ArrayList<DateRange>();
SimpleDateFormat sdf = new SimpleDateFormat("dd MMM yyyy");

// Case1

l.add(new DateRange(sdf.parse("01 Jan 2014"), sdf.parse("30 Jan 2014")));
l.add(new DateRange(sdf.parse("15 Jan 2014"), sdf.parse("15 Feb 2014")));
l.add(new DateRange(sdf.parse("10 Mar 2014"), sdf.parse("15 Apr 2014")));
l.add(new DateRange(sdf.parse("10 Apr 2014"), sdf.parse("15 May 2014")));

// Case2
/*
* l.add(new DateRange(sdf.parse("01 Jan 2014"), sdf.parse("15 Jan 2014")));
* l.add(new DateRange(sdf.parse("16 Jan 2014"), sdf.parse("30 Jan 2014")));
*/

// Case3
/*
* l.add(new DateRange(sdf.parse("01 Jan 2014"), sdf.parse("15 Jan 2014")));
* l.add(new DateRange(sdf.parse("15 Jan 2014"), sdf.parse("30 Jan 2014")));
*/

List<DateRange> resultList = new ArrayList<DateRange>();
resultList = d.mergeDates(l);

System.out.println("*****Final Result*****");

for (DateRange temp : resultList) {
System.out.println("Start Date : " + temp.getStartDate() + "\tEnd Date : " + temp.getEndDate());
}

} catch (Exception e) {
System.out.println(e.getMessage());
}

}
}