Find duplicate content and consolidate in groovy - groovy

Question

I want to edit a file automatically with groovy.
For example, i have the following textfile:
(First line is only for your understanding)
branch ID item ID - - weight piece --- --- ---
178568305 108350 0 0 0 -1 215 215 012
178568305 102190 0 0 0 -1 74 74 012
178568305 102120 0 0 0 -8 35 35 012
178568305 102190 0 0 0 -6 74 74 012
178568305 102190 0 0 0 -6 74 74 012
178587626 108280 0 0 0 -3 189 189 012
178587626 159550 0 0 0 -1 499 499 012
178587626 107740 0 0 0 -4 229 229 012
178587626 105330 0 0 -10 0 626 626 012
178587626 102190 0 0 0 -6 74 74 012
In column 1 i have a brach ID
In column 2 i have a item ID
In column 5 i have a weight, for example in gram
In column 6 i have a number of pieces
Column 3, 4, 7, 8 and 9 are not important
In branch ID:
From line 1 to 5 and 6 and from 6 to 10 i have two different branchs IDs
In item ID:
In line 2, 4 and 5 i have the same item ID always to the same branche ID.
Now, what i want is to consolidate the the item ID 102190 with branch ID 178568305 to one line.
But the piece or weight have to count in sum in these one line.
But attention: In Line 10 i have the same item ID like in Line 2 or 4, but i have a another branch ID. It is not allowed to consolidate the weight/piece from line 10 with 2, 4 and 5!
For Example:
branch ID item ID - - weight piece --- --- ---
178568305 108350 0 0 0 -1 215 215 012
178568305 102120 0 0 0 -8 35 35 012
178568305 102190 0 0 0 -13 74 74 012
178587626 108280 0 0 0 -3 189 189 012
178587626 159550 0 0 0 -1 499 499 012
178587626 107740 0 0 0 -4 229 229 012
178587626 105330 0 0 -10 0 626 626 012
178587626 102190 0 0 0 -6 74 74 012
My input text file is only separated with spaces. My output textfile must be exact the same.
Unfortunately, I have no idea how to create this in a groovy script.
Can anyone help? Tutorials are helpful too. I have no idea for the logical script expiration.

Answer 1

You just need to group the data by branchId and itemId, here is a working code for you:
def input = new File("input.txt")
def output = new File("output.txt")
PrintWriter printWriter = new PrintWriter(output)
Map<String, String[]> result = [:]
input.eachLine { currentLine, lineNumber ->
def array = currentLine.split(" +");
String rowId = array[0] + "_" + array[1];
if(lineNumber == 1 ){
result.put(rowId, array)
}else {
String[] rowValues = array;
if(null != result.get(rowId)){
String[] existingValues = result.get(rowId);
for(int i = 0; i < existingValues.length; ++i){
try{
existingValues[i] = String.valueOf( rowValues[i].toInteger() + existingValues[i].toInteger())
}catch (NumberFormatException ex){
print(ex)
}
}
}else{
result.put(rowId, rowValues)
}
println(array)
}
}
int maxColumnWidth = 14;
result.each { key, value ->
for(int i = 0; i < value.length; ++i){
if(i == 0){
printWriter.print(value[i])
}else{
String v = value[i];
while(v.length() < maxColumnWidth){
v = " " + v;
}
printWriter.print(v)
}
}
printWriter.println()
}
printWriter.close()
Sample Input:
branch ID item ID - - weight piece --- --- ---
178568305 108350 0 0 0 -1 215 215 012
178568305 102190 0 0 0 -1 74 74 012
178568305 102120 0 0 0 -8 35 35 012
178568305 102190 0 0 0 -6 74 74 012
178568305 102190 0 0 0 -6 74 74 012
178587626 108280 0 0 0 -3 189 189 012
178587626 159550 0 0 0 -1 499 499 012
178587626 107740 0 0 0 -4 229 229 012
178587626 105330 0 0 -10 0 626 626 012
178587626 102190 0 0 0 -6 74 74 012
Output:
branch ID item ID - - weight piece --- --- ---
178568305 108350 0 0 0 -1 215 215 012
535704915 306570 0 0 0 -13 222 222 36
178568305 102120 0 0 0 -8 35 35 012
178587626 108280 0 0 0 -3 189 189 012
178587626 159550 0 0 0 -1 499 499 012
178587626 107740 0 0 0 -4 229 229 012
178587626 105330 0 0 -10 0 626 626 012
178587626 102190 0 0 0 -6 74 74 012