CODEWITHSUNDEEP
scala
jOasis
jOasis

Reputation: 394

Restructring the textfile based on pattern in the file

I would like to reformat the content of the text file using Scala such as for the given sample file:

"good service"
Tom Martin (USA) 17th October 2015    
4    
Hi my name is
Tom.
I love boardgames.
Aircraft    TXT-102   

"not bad"
M Muller (Canada) 22nd September 2015
6
Hi
I
like
boardgames.
Aircraft    TXT-101
Type Of Customer    Couple Leisure
Cabin Flown FirstClass
Route   IND to CHI
Date Flown  September 2015
Seat Comfort    12345
Cabin Staff Service 12345

.
.

Gets reformated to this:

"good service"
Tom Martin (USA) 17th October 2015    
4    
Hi my name is Tom. I love boardgames.
Aircraft    TXT-102    

"not bad"
M Muller (Canada) 22nd September 2015
6
Hi I like boardgames.
Aircraft    TXT-101
Type Of Customer    Couple Leisure
Cabin Flown FirstClass
Route   IND to CHI
Date Flown  September 2015
Seat Comfort    12345
Cabin Staff Service 12345

.
.

I have identified the pattern of my file, which is: This multi-line string comes between a digit and word separated by tabs. For example, first block's multi line content comes between 4 and Aircraft TXT-102. Second block's multi line content comes between 6 and Aircraft TXT-101 Also, blocks are delimited by two new lines.

I know of Pattern matching using regex can help but I do not know how to handle this on file.

Upvotes: 0

Views: 15

Answers (1)

9000
9000

Reputation: 40894

What I'd do, in pseudocode:

while more lines available { 
    lines_so_far = read input until a number is seen
    output(lines_so_far)
    lines_to_join = read input until "Aircraft" is seen
    output(joined lines_to_join)
}

A regexp for a line consisting of only a number is ^\d+$; for a line starting with "Airline", ^Airline .*. The convenience method to look at is takeWhile.

Upvotes: 1

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