Cannot read a fixed-length without line-ending. [BATCH-2538]

[spring-projects-issues]

Kiichi Kuramoto opened BATCH-2538 and commented

FlatFileItemReader can not read a fixed-length file without line-ending, because it call BufferedReader#readline() at reading a record.
In general, a fixed-length file is often a line-ending not exist.
I would like to add new BufferedReader implementation for reading fixed-length file without line-ending (by specifying fixed-length size).

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Affects: 3.0.7

2 votes, 10 watchers

[spring-projects-issues]

Aaron Patula commented

I'm a new contributor and would like to work on this issue.

[spring-projects-issues]

Mahmoud Ben Hassine commented

In general, a fixed-length file is often a line-ending not exist.

I'm not sure I understand this, do you mean the whole file is on a single line? Can you attach an example please?

[spring-projects-issues]

Mahmoud Ben Hassine commented

Any update on this?

[spring-projects-issues]

Hironobu Takahashi commented

do you mean the whole file is on a single line?

Yes. Examples are shown below.
(1 character = 1 byte)

Fixed-length file (Delimiter between records is number of bytes. 32 bytes = 1 record)

Sale012016 1   00000011000000000Sale022017 2   00000022000000000Sale032018 3   00000033000000000

[fmbenhassine]

Thanks for your update. Indeed, this type of files can be read using a custom BufferedReader. You are welcome to contribute if you want. You can get inspiration from the BinaryBufferedReader provided by Spring Batch or the FixedLengthBufferedReader from this example repo.

[parikshitdutta]

Hi @benas, can I look into this?

[fmbenhassine]

@parikshitdutta Sure! Anything without a PR is open for contribution, no need to ask. Thank you for all your contributions!