public void initialiseMerge(
String folderPath,
String filename,
String finalfile,
String tableName,
TOrderByItemList tOrderByItemList,
HashMap<String, Integer> hmp) {
int i, j;
String[] dataLines = new String[fragments];
// Integer[] hash = new Integer[fragments];
String min, temp;
int result;
int minIndex = 0;
Iterator<Integer> itr;
Set<Integer> set = new LinkedHashSet<Integer>();
FileReader[] file = new FileReader[fragments];
File[] del = new File[fragments];
// System.out.println("-------------"+fragments);
try {
FileWriter fd = new FileWriter(folderPath + "/" + finalfile);
BufferedWriter bd = new BufferedWriter(fd);
BufferedReader[] reader = new BufferedReader[totalFiles];
for (i = 0; i < fragments; i++) {
set.add(i);
file[i] = new FileReader(folderPath + "/" + filename + Integer.toString(i));
del[i] = new File(folderPath + "/" + filename + Integer.toString(i));
reader[i] = new BufferedReader(file[i]);
dataLines[i] = reader[i].readLine();
}
// find minimum among all of them
while (!set.isEmpty()) {
itr = set.iterator();
i = itr.next();
j = 0;
while (dataLines[i].charAt(j) != ',') j++;
// System.out.println("below 1while");
min = dataLines[i];
minIndex = i;
// System.out.println("above while");
while (itr.hasNext()) {
i = itr.next();
temp = dataLines[i];
result = Main.compareRecords(tableName, min, temp, tOrderByItemList, hmp);
if (result > 0) {
minIndex = i;
min = dataLines[i];
}
}
// System.out.println("min:"+dataLines[minIndex]);
bd.write(dataLines[minIndex] + "\n");
// System.out.println("Gonna Write:"+dataLines[minIndex]+"\n");
dataLines[minIndex] = reader[minIndex].readLine();
if (dataLines[minIndex] == null) {
set.remove(minIndex);
del[minIndex].delete();
}
}
bd.close();
fd.close();
// for(i = 0; i < fragments;i++)
// reader[minIndex].close();
} catch (Exception e) {
System.out.println("Except" + e);
}
}
