collections - Groovy GroupBy field with and without white spaces

Question

I have invoices list as below

def invoices = [
'LEDES98BI V2',
'LINE|INVOICE_DATE|INVOICE_NUMBER|INVOICE_TOTAL',
'1|20150301|INV-Error_Test1|22',
'2|20150301|INV-Error_Test1|24',
'3|20150301|INV-Error_Test2|26',
'4|20150301|INV-Error_Test2|28,']

I am trying to do groupBy on the above collection with INVOICE_NUMBER and trying to achieve map with INVOICE_NUMBER and lines as values, below code does it

def lines = invoices*.split('\|').findAll{ it.size()>1 }
def heads = lines.first()
def invoiceMap =  lines.tail().collect{ [heads, it].transpose().collectEntries() }.groupBy{ it.INVOICE_NUMBER }

If I print invoiceMap I get what I intended as below map

 [INV-Error_Test1:[[LINE:1, INVOICE_DATE:20150301, INVOICE_NUMBER:INV-Error_Test1, INVOICE_TOTAL:22], 
                   [LINE:2, INVOICE_DATE:20150301, INVOICE_NUMBER:INV-Error_Test1, INVOICE_TOTAL:24]], 
  INV-Error_Test2:[[LINE:3, INVOICE_DATE:20150301, INVOICE_NUMBER:INV-Error_Test2, INVOICE_TOTAL:26], 
                   [LINE:4, INVOICE_DATE:20150301, INVOICE_NUMBER:INV-Error_Test2, INVOICE_TOTAL:28,]]
  ]

But but if the INVOICE_NUMBER has any white spaces with it in the invoices map my code doesnt work. Can someone help me to make my code work with white spaces on INVOICE_NUMBER?

Answer 1

Use a proper CSV parser, rather than rolling your own.

@Grab('com.xlson.groovycsv:groovycsv:1.0')
import static com.xlson.groovycsv.CsvParser.parseCsv

def invoices = [
'LEDES98BI V2',
'LINE|INVOICE_DATE|INVOICE_NUMBER|INVOICE_TOTAL',
'1|20150301|INV-Error_Test1|22',
'2|20150301|INV-Error_Test1|24',
'3|20150301|INV-Error_Test2|26',
'4|20150301|INV-Error_Test2|28,']

def data = parseCsv(invoices.drop(1).join('
'), separator:'|')
def invoiceMap = data.collect().groupBy { it.INVOICE_NUMBER }

Or with a space in the column title:

def invoices = [
'LEDES98BI V2',
'LINE|INVOICE_DATE|INVOICE NUMBER|INVOICE_TOTAL',
'1|20150301|INV-Error_Test1|22',
'2|20150301|INV-Error_Test1|24',
'3|20150301|INV-Error_Test2|26',
'4|20150301|INV-Error_Test2|28,']

def data = parseCsv(invoices.drop(1).join('
'), separator:'|')
def invoiceMap = data.collect().groupBy { it.'INVOICE NUMBER' }